SWITCHMODE™ Power Supply Reference Manual

SMPSRM/DRev. 2, Apr-2000SWITCHMODE PowerSupply Reference ManualON Semiconductor

SWITCHMODE Power SuppliesReference Manual and Design GuideSMPSRM/DRev. 2, Apr–2000© SCILLC, 2000Previous Edition © 1999“All Rights Reserved’’

What Everyone Should Know About SwitchingPower SuppliesBy: Marty BrownIntroductionEfficient conversion of electrical power is becominga primary concern to companies and to society as a whole.Switching power supplies offer not only higherefficiencies but also offer greater flexibility to thedesigner. Recent advances in semiconductor, magneticand passive technologies make the switching powersupply an ever more popular choice in the powerconversion arena today.This Guide is designed to give the prospective designeran overview of all the issues involved in designingswitchmode power supplies. It describes the basicoperation of the more popular topologies of switchingpower supplies, their relevant parameters, provides circuitdesign tips, and information on how to select the mostappropriate semiconductor and passive components. ThisGuide lists the ON Semiconductor components expresslybuilt for use in switching power supplies.Linear versus SwitchingPower SuppliesHistorically, the linear regulator was the primarymethod of creating a regulated output voltage. It operatesby reducing a higher input voltage down to the loweroutput voltage by linearly controlling the conductivity ofa series pass power device in response to changes in itsload. This results in a large voltage being placed acrossthe pass unit with the load current flowing through it.This headroom loss (Vdrop ⋅ Iload) causes the linearregulator to only be 30 to 50 percent efficient. That meansthat for each watt delivered to the load, at least a watt hasto be dissipated in heat. The cost of the heatsink actuallymakes the linear regulator uneconomical above 10 wattsfor small applications. Below that point, however, theyare cost effective in step-down applications.The switching regulator operates the power devices inthe full-on and cutoff states. This then results in eitherlarge currents being passed through the power deviceswith a low “on” voltage or no current flowing with highvoltage across the device. This results in a much lowerpower being dissipated within the supply. The averageswitching power supply exhibits efficiencies of between70 to 90 percent, regardless of the input voltage.SMPSRMHigher levels of integration have driven the cost ofswitching power supplies downward which makes it anattractive choice for output powers greater than 10 wattsor where multiple outputs are desired.Basic ConvertersForward-Mode Converter FundamentalsThe most elementary forward-mode converter is theBuck or Step-down Converter which can be seen inFigure 1. Its operation can be seen as having two distincttime periods which occur when the series power switchis on and off. When the power switch is on, the inputvoltage is connected to the input of the inductor. Theoutput of the inductor is the output voltage, and therectifier is back-biased. During this period, since there isa constant voltage source connected across the inductor,the inductor current begins to linearly ramp upwardwhich is described by:. Vin V out. toni L . on.LDuring the “on” period, energy is being stored withinthe core material of the inductor in the form of flux. Thereis sufficient energy stored to carry the requirements of theload during the next off period.The next period is the “off” period of the powerswitch. When the power switch turns off, the inputvoltage of the inductor flies below ground and is clampedat one diode drop below ground by the catch diode.Current now begins to flow through the catch diode thusmaintaining the load current loop. This removes thestored energy from the inductor. The inductor currentduring this time is:. Vout V D. toffi L .off.LThis period ends when the power switch is once againturned on.Regulation is accomplished by varying the on-to-offduty cycle of the power switch. The relationship whichapproximately describes its operation is:V out∂ ·V inwhere ∂ is the duty cycle (∂ = ton/(ton + toff))http://onsemi.com5

SMPSRMBasic Converters (continued)The buck converter is capable of kilowatts of outputpower, but suffers from one serious shortcoming whichwould occur if the power switch were to failshort-circuited, the input power source is connecteddirectly to the load circuitry with usually producescatastrophic results. To avoid this situation, a crowbar isplaced across the output. A crowbar is a latching SCRwhich is fired when the output is sensed as entering anovervoltage condition. The buck converter should onlybe used for board-level regulation.SWLOVinDCoutRLOADLOILOA Basic Forward-Mode Converter(Buck Converter Shown)ILOVinCoutVoutRLOADVD(FWD)(DIODE)CoutVoutRLOADPower Switch ONVon(SW)Power Switch OFFDIODE VOLTAGE (VOLTS)Vin0POWER SWITCHOFFVD(FWD)POWER SWITCHONPOWER SWITCHOFFPOWER SWITCHONTIMEINDUCTOR CURRENT(AMPS)DIODEIPKPOWER SWITCHILOAD(AV)IMINDIODE POWER SWITCHTIMEFigure 1. Forward-Mode Converter Operation(Buck Converter Shown)http://onsemi.com6

SMPSRMBasic Converters (continued)Flyback or Boost-mode ConverterFundamentalsThe most elementary flyback-mode converter is theBoost or Step-up Converter. Its schematic can be seen inFigure 2. Its operation can also be broken into twodistinct periods where the power switch is on and off.When the power switch turns on, the input voltage sourceis placed directly across the inductor. This causes thecurrent to begin linearly ramping upwards from zero andis described by:i L . on. . Vin . tonOnce again, energy is being stored within the corematerial.LThe amount of energy stored during each cycle timesthe frequency of operation must be higher than the powerdemands of the load or,Psto = 0.5 ⋅ L ⋅ I2 pk ⋅ fop > PoutThe power switch then turns off and the inductorvoltage flys back above the input voltage and is clampedby the rectifier at the output voltage. The current thenbegins to linearly ramp downward until the energy withinthe core is completely depleted. Its waveform which isshown in Figure 3 is determined by:.V out V in. t offi L .off.LThe boost converter should also be only used forboard-level regulation.LDVinSWCoutRLOADA Basic Flyback-Mode Converter(Boost Converter Shown)ILIonILOADIOffILOADVinLVoutCoutRLOADVinVoutCoutRLOADPower Switch ONPower Switch OFFFigure 2. Schematic of a Boost Converterhttp://onsemi.com7

SMPSRMVFLBKSWITCH VOLTAGE(VOLTS)POWERSWITCHONVon(SW)DIODEONVinPOWERSWITCHONDIODEONPOWERSWITCHONTIMEINDUCTOR CURRENT(AMPS)IPKILOAD(AV)Figure 3. Waveforms for a Boost ConverterTIMECommon TopologiesA topology is the arrangement of the power devicesand their magnetic elements. Each topology has its ownmerits within certain applications. Some of the factorswhich determine the suitability of a particular topologyto a certain application are:1) Is the topology electrically isolated from theinput to the output or not.2) How much of the input voltage is placed acrossthe inductor or transformer.3) What is the peak current flowing through thepower semiconductors.4) Are multiple outputs required.5) How much voltage appears across the powersemiconductors.The first choice that faces the designer is whether tohave input to output transformer isolation. Non-isolatedswitching power supplies are typically used forboard-level regulation where a dielectric barrier isprovided elsewhere within the system. Non-isolatedtopologies should also be used where the possibility of afailure does not connect the input power source to thefragile load circuitry. Transformer isolation should beused in all other situations. Associated with that is theneed for multiple output voltages. Transformers providean easy method for adding additional output voltages tothe switching power supply. The companies buildingtheir own power systems are leaning toward transformerisolation in as many power supplies as possible since itprevents a domino effect during failure conditions.The remainder of the factors involve how much stressthe power semiconductors are being subjected to. Table 1shows the differences between the various topologiesused within switching power supplies. Figure 4illustrates where the transformer-isolated topologies aretypically used within the power industry at various powerand voltage levels. At reduced DC input voltages and athigher powers, the peak currents that must be sustainedby the power switch grow higher which then affects thestress they must endure. The various areas show whichtopology best fits within that range of input voltage andoutput power that exhibits the least amount of stress onthe power semiconductors.http://onsemi.com8

ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇSMPSRMCommon Topologies (continued)Table 1. Comparison of the PWM Switching Regulator TopologiesTopologyPwr Range(Watts)Vin(DC)RangeIn/OutIsolationTypicalEffic. (%)RelativeCostFigureNo.Buck 0 – 1000 5.0 – 1000* No 75 1.0 Figure 5Boost 0 – 150 5.0 – 600* No 78 1.0 Figure 6Buck-Boost 0 – 150 5.0 – 600* No 78 1.0 Figure 7Half-Forward 0 – 250 5.0 – 500 Yes 75 1.4 Figure 8Flyback 0 – 150 5.0 – 600 Yes 78 1.2 Figure 9Push-Pull 100 – 1000 50 – 1000 Yes 72 2.0 Figure 10Half-Bridge 100 – 500 50 – 1000 Yes 72 2.2 Figure 11Full-Bridge 400 – 2000+ 50 – 1000 Yes 69 2.5 Figure 12* No human access – otherwise < 42.5 V and 8.0 Amp limit (UL, CSA, VDE)1000DC INPUT VOLTAGE (V)ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ100ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÉÉÉÉÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ10HIGH PEAK CURRENTS,RELIABILITY ISIN JEOPARDYÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇFLYBACKHALF BRIDGEFULL BRIDGE101001000ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇOUTPUT POWER (W)Figure 4. Where Various Transformer-IsolatedTopologies are Commonly Usedhttp://onsemi.com9

SMPSRMPOWERSWITCHLVDVFWDVinCinCONTROLDFEEDBACKVoutCoutIL0VinIPKTIME0ILOADIMINTIMEFigure 5. The Buck Regulator TopologyVFLBKVinCinCONTROLQLDCoutVoutVSWIL0VinVSATIPKDONSW ONDONTIMEFEEDBACK0ISWIDTIMEFigure 6. The Boost Regulator TopologyVinCinCONTROLQDVL0Vin–VoutTIMELCoutVoutGNDIL0ISWIDIPKTIMEFigure 7. The Buck/Boost Regulator Topologyhttp://onsemi.com10

SMPSRMVinCinN1TN2DLCoutVSWVout 0VSAT2VinSWONTIMECONTROLQIPRIFEEDBACK0TIMEIMINIPKFigure 8. The Half-Forward Regulator TopologyVFLBKTDVSW0VinVSATSWONTIMEVinCinCONTROLN1QN2CoutVoutIPRI0IPKTIMEFEEDBACKISEC0TIMEFigure 9. The Flyback Regulator Topology2VinQ1TDLVinSW2VinCinCONTROLQ2DCoutVOVSW0IPRIVSATIPKSW1TIME0TIMEIMINFigure 10. The Push-Pull Regulator Topologyhttp://onsemi.com11

SMPSRMLVinVinCinCONTROLXFQ1Q2B CoutN2TCN1CFEEDBACKVoutV in2VSW2IPRI00IMINVSATIPKSW2SW1TIMETIMEFigure 11. The Half-Bridge Regulator TopologyLVinVinCinCONTROLXFQ1Q2TCoutXFQ3Q4VoutV in2VSW2 0ISW20VSATIPKIMINSW2-3SW1-4TIMETIMEFEEDBACKFigure 12. The Full-Bridge Regulator Topologyhttp://onsemi.com12

Power Factor CorrectionThe present day power supplies use a capacitive inputfilter when powered from the AC power line. A resultingshortcoming is that the AC line is rectified which resultsin high peak currents at the crests of the AC voltage asshown in Figure 13. These peak currents are typicallythree to five times higher than the average current drawnby the power supply. This causes excessive voltage dropin the wiring and imbalance problems in the three phasedelivery system. Also the full energy potential of the ACline is not utilized.SMPSRMvoltages down to 30 volts can be boosted to 370 volts onits output (higher than the highest expected peakoperating AC crest voltage). The boost power factorcorrection circuit can be seen in Figure 36 on page 36.The bulk input filter capacitor is now placed on the outputof the boost converter. The input capacitor, just followingthe 50/60 Hz rectifier bridge is now less than 1 uF. Thisproduces an input voltage waveform to the PFC circuitthat has a high level of ripple voltage and the boostconverter draws its power directly from the line.110/220VOLTS INFROM WALLSOCKETICLARGETO POWERSUPPLYDCOUTPUTVOLTAGEICSMALLCONTROLCLARGEPOWERNOTUSEDPOWERNOT USEDVOLTAGEPOWERUSEDVOLTAGEPOWERUSEDCURRENTIAVCURRENTIAVFigure 13. The Waveforms of a CapacitiveInput FilterThe task is to increase the conduction angle of the ACrectifiers and to make the resulting current waveformlook as sinusoidal and in phase with the voltagewaveform as possible. In this way, the power drawn bythe power supply from the line is maximized for realpower as shown in Figure 14.A popular method of accomplishing this is by using aboost converter prior to the actual power supply.Boost-mode supplies exhibit the largest input dynamicrange of all the switching power supply topologies. InputFigure 14. Power Factor Corrected InputThe semiconductors within a power factor correctionstage have some special requirements. First, the 50/60 Hzrectifiers now have to be ultrafast rectifiers, since fastcurrent pulses are being drawn through them. The boostoutput rectifier will have to be ultrafast if the boostconverter is operating in the continuous-mode. Thepower switch has to clear the diode’s reverse recoverycharge. In the discontinuous-mode (Pin < 200 watts), theoutput rectifier need not be ultrafast since there is nocurrent flowing through the diode prior to the powerswitch turning on.http://onsemi.com13

SMPSRMPower Factor Correction (continued)Input current waveshaping is required by theregulatory agencies. The MC33262 has a internalmultiplier to make the input current waveform mimic theinput voltage waveform. All the circuitry needed toaccomplish this task is included in the MC33262 with theminimum of external components.Figure 36 on page 36 is an 80 watt power factorcorrection stage for the 110 VAC line. This design meetsall the specifications of IEC1000–3–2. The results areshown in Table 2.Table 2. Power Factor Controller Test DataAC Line InputDC OutputCurrent Harmonic Distortion (% Ifund)Vrms Pin PF Ifund THD 2 3 5 7 VO(pp) VO IO PO η(%)90 85.9 0.999 0.93 2.6 0.08 1.6 0.84 0.95 4.0 230.7 0.350 80.8 94.0100 85.3 0.999 0.85 2.3 0.13 1.0 1.2 0.73 4.0 230.7 0.350 80.8 94.7110 85.1 0.998 0.77 2.2 0.10 0.58 1.5 0.59 4.0 230.7 0.350 80.8 94.9120 84.7 0.998 0.71 3.0 0.09 0.73 1.9 0.58 4.1 230.7 0.350 80.8 95.3130 84.4 0.997 0.65 3.9 0.12 1.7 2.2 0.61 4.1 230.7 0.350 80.8 95.7138 84.1 0.996 0.62 4.6 0.16 2.4 2.3 0.60 4.1 230.7 0.350 80.8 96.0T = Coilcraft N2881–APrimary: 62 turns of # 22 AWGSecondary: 5 turns of # 22 AWGCore: Coilcraft PT2510, EE 25Gap: 0.072″ total for a primary inductance (L P ) of 320 µHHeatsink = AAVID Engineering Inc. 590302B03600, or 593002B03400http://onsemi.com14

Quasi-Resonant ConvertersQuasi-resonant technology is a field within switchingpower supplies where the design goal is to eliminate thefrequency dependent switching losses within the powerswitch and rectifiers. Eliminating the switching lossesallows the designer to increase the operating frequencyof the switching power supply with the goal of reducingsize and weight. Acceptance of quasi-resonanttechnology has been slow because of some other issuespresented by operating at high frequencies.Schematically, quasi-resonant topologies are minormodifications of the PWM topologies. A resonant tankcircuit has been added to the power switch section toSMPSRMmake either the current or the voltage “ring” through ahalf a sinusoid waveform. Since a sinusoid starts at zeroand ends at zero, the product of the voltage and currentat the starting and ending points is zero, thus has noswitching loss.There are two quasi-resonant methods: zero currentswitching (ZCS) or zero voltage switching (ZVS). ZCSis a fixed on-time, variable off-time method of control.ZCS starts from an initial condition where the powerswitch is off and there is no current flowing through theresonant inductor. The ZCS, quasi-resonant buckconverter is shown in Figure 15.ILRLRLOVinCinCONTROLVSWCRDFEEDBACKCoutVoutA ZCS Quasi–Resonant Buck ConverterSWITCHTURN-OFFV SWVinPOWER SWITCHONIPKV DI LRFigure 15. Schematic and Waveforms for aZCS Quasi-Resonant Buck Converterhttp://onsemi.com15

SMPSRMQuasi-Resonant Converters (continued)In this design, both the power switch and the catchdiode operate in a zero current switching mode. Power ispassed to the output during the resonant periods. So toincrease the power delivered to the load, the frequencywould increase, and vise versa for decreasing loads. Intypical designs the frequency can change 10:1 over theZCS supply’s operating range.The ZVS is a fixed off-time, variable on-time methodof control. Here the initial condition is when the powerswitch is on, and the familiar current ramp is flowingthrough the filter inductor. The ZVS, quasi-resonantbuck converter is shown in Figure 16. Here, to control thepower delivered to the load, the amount of “resonant offtimes” are varied. For light loads, the frequency is high.When the load is heavy, the frequency drops. In a typicalZVS power supply, the frequency typically varies 4:1over the entire operating range of the supply.There are variations in the resonant field that promotezero switching losses such as full resonant PWM, full andhalf-bridge topologies for the higher powers andresonant transition topologies.LRLOVinCinCONTROLVI/PCRDFEEDBACKCoutVoutA ZCS Quasi–Resonant Buck ConverterVinV I/P0POWER SWITCHTURNS ONV in V outIPKL R L OI SWV in0ILOADI DL RFigure 16. Schematic and Waveforms for aZVS Quasi-Resonant Buck Converterhttp://onsemi.com16

Losses and Stresses withinSwitching Power SuppliesMuch of the designer’s effort during a switchingpower supply design is spent in identifying andminimizing the losses within the supply. Some of theselosses can also present stresses to the semiconductorpower components which may affect the long termreliability of the power supply. Knowing where the lossesarise and how to control them is important.Most of the losses occur in the power componentswithin the switching power supply. The most fragilecomponents are the power semiconductors. Identifyingthe major sources for loss can be as easy as placing afinger on each of the components, or measuring thecurrents and voltages associated with each powercomponent using an oscilloscope AC current probe andvoltage probe. Whenever there is a simultaneous voltagedrop across a component with a current flowing throughit, there is a loss. Some of these losses are controllable bySMPSRMmodifying the circuitry, and some are controlled bysimply selecting a different part.The semiconductor losses fall into two categories:conduction losses and switching losses. Examples ofconduction losses are the saturation voltage of a bipolarpower transistor, the “on” loss of a power MOSFETshown in Figure 17 and Figure 18 and the forwardvoltage drop of a rectifier shown in Figure 19. Switchinglosses occur during the small period when a powercomponent switches between the on and off state. Here,voltages are transitional between full-on and cutoff stateswhile simultaneously the current is transitional betweenfull-on and cuttoff states. This creates a very large V-Iproduct which is as significant as the conduction losses.Switching losses are also the major frequency dependentloss within every PWM switching power supply.COLLECTOR-TO-EMITTER(VOLTS)COLLECTOR CURRENT(AMPS)INSTANTANEOUS ENERGYLOSS (JOULES)RISETIMEPINCHING OFF INDUCTIVECHARACTERISTICS OF THETRANSFORMERTURN-ONCURRENTTURN-ONLOSSDYNAMICSATURATIONCLEARINGRECTIFIERSSATURATIONVOLTAGESATURATIONCURRENTSECONDBREAKDOWNPERIODV PEAKSTORAGETIMETURN-OFFCURRENTI PEAKSATURATIONLOSSTURN-OFF LOSSSWITCHING LOSSFigure 17. Stresses and Losseswithin a Bipolar Power TransistorFALLTIMECURRENTTAILCURRENTCROWDINGPERIODDRAIN-TO-SOURCE VOLTAGE(VOLTS)DRAIN CURRENT(AMPS)INSTANTANEOUS ENERGYLOSS (JOULES)RISETIMETURN-ONCURRENTTURN-ONLOSSCLEARINGRECTIFIERSON VOLTAGEON CURRENTV PEAKFALLTIMEPINCHING OFF INDUCTIVECHARACTERISTICS OF THETRANSFORMERON LOSSTURN-OFFCURRENTFigure 18. Stresses and Losseswithin a Power MOSFETI PEAKTURN-OFF LOSSSWITCHING LOSShttp://onsemi.com17

SMPSRMLosses and Stresses withinSwitching Power Supplies(continued)The losses do provide stress in the form of heatgeneration within the component. This is not a problemif a reasonable thermal design is used. For bipolar powertransistors, however, excessive switching losses can alsoprovide a lethal stress to the transistor in the form ofsecond breakdown and current crowding failures. Careshould be taken in the careful analysis of each transistor’sFBSOA and RBSOA operation.DIODE VOLTAGE(VOLTS)DIODE CURRENT(AMPS)INSTANTANEOUS ENERGYLOSS (JOULES)FORWARDRECOVERYTIME (T fr )FORWARD VOLTAGEREVERSE VOLTAGEFORWARD CONDUCTION CURRENTDEGREE OF DIODERECOVERYABRUPTNESSFORWARD CONDUCTION LOSSREVERSERECOVERYTIME (T rr )Figure 19. Stresses and Losseswithin RectifiersI PKSWITCHINGLOSSBipolar PowerTransistorsBipolar power transistors are used in about 50 percentof the switching power supplies built today. They offerseveral advantages over power MOSFETs in that theyhave higher breakdown voltages, and are somewhat lessexpensive for devices greater than 500 volts.Bipolar power transistors are current driven devices.That is, in order to have a current flowing from thecollector to the emitter, one must drive current into thebase. Within switching power supplies, the objective is tohave as small a collector-to-emitter voltage as possiblewhen the transistor is “on”. To do this the designer strivesto have the transistor operate in, or close to a saturatedstate.Saturation is defined as:I B I Ch FEThere are two types of base drive: fixed base drive andproportional base drive. In most switching powersupplies using bipolar transistors whose output power isless than 500 watts, fixed base drive is typically used.Fixed base drive is where the transistor is driven with afixed amount of “on” drive current sufficiently high toguarantee that the transistor remains saturated at thehighest expected peak collector currents. At collectorcurrents less than the maximum, the transistor exhibits acondition known as storage time which is a time delayduring the turning off of the transistor and a slower falltime. For better performance, proportional base drive isused. This drives the transistor to a state just undersaturation at all peak currents. Very short storage time isexperienced and its switching speed is substantiallyimproved. Proportional base drive is more expensive toimplement, so usually it is only used for high powerswitching power supplies. For the transistor to switchfast, the drive current should enter and exit the transistorfast. To accomplish this special attention should be givento the drive circuitry. Some common base drive circuitsare shown in Figure 20.http://onsemi.com18

SMPSRMBipolar Power Transistors (continued)VCVCACTIVE TURN-ON, PASSIVE TURN-OFFTOTEM-POLE DRIVEVCVCTRANSFORMER COUPLED DRIVEPROPORTIONAL BASE DRIVEVCBAKER CLAMPFigure 20. Common Transistor Base Drive CircuitsOne other consideration is from where one draws thecurrent to drive the base of the transistor. If a voltage ofgreater than 5 volts is used, then the loss associated withdriving the base is large. Usually a low voltage auxiliarywinding is used to develop this voltage.For more information, refer to Application NoteAN875 (“Power Transistor Safe Operating Area: SpecialConsiderations for Switching Power Supplies”).http://onsemi.com19

SMPSRMPower MOSFETsPower MOSFETs are becoming increasingly morepopular for use as power switches within switchingpower supplies. MOSFETs have some advantages overthe bipolar transistor such as switching five to ten timesfaster than bipolar transistors and being easier to driveand use. To the novice designer, it is as close to a logicswitching device as one can get.Power MOSFETs are voltage driven devices. That isits conductivity is determined by a voltage provided onits gate. MOSFETs can be driven directly from controllerICs that have totem pole output drivers with less than100 nS switching times. The drive source, however, mustbe a well bypassed voltage source. This is because thegate of a MOSFET resembles a capacitor which must becharged and discharged in that 100 nS. So it must becapable of sourcing and sinking at least 1.5 ampere peakcurrents. Bipolar totem pole drives fill this need. TheMC34151 (inverting) and the MC34152 (non-inverting)MOSFET driver ICs provide the drive that MOSFETsneed to switch fast with an input from a logic-levelsource. The MC33153 and MC33154 are speciallydesigned gate drivers for IGBTs. See Figure 21 for someof the common gate drives for MOSFETS.+10 V+5 VMC34151Figure 21. Power MOSFET Drive Circuitshttp://onsemi.com20

RectifiersChoosing the best rectifiers for any switching powersupply design is an important process. The rectifiers arethe largest source of loss within switching powersupplies. To choose the the best rectifier, one mustunderstand the parameters that affect their efficiency.The most important rectifier parameters are theforward voltage drop (Vf) and the reverse recovery time(trr). The forward voltage drop creates a loss just byhaving a voltage across the device while high currents areflowing through it.Its conduction loss is described by:P fwdloss f op ·t ont 0V dtfwdThe typical method of measuring this loss is toSMPSRMgraphically multiply the current and voltage waveformsfrom the oscilloscope times the frequency of operation.The reverse recovery loss is where the rectifierbecomes reverse biased, and current appears to actuallyflow backwards through the rectifier. It is actually theminority carriers being swept from the P-N junction.Nonetheless, it is a significant loss. This loss isminimized by selecting the rectifier with the shortestreverse recovery time (trr).Table 3 shows a summary of the various rectifiertechnologies that are appropriate in switching powersupplies. For low voltage outputs, Schottky rectifiers arerecommended because of their low forward voltage dropand their negligible reverse recovery time. For higheroutput voltages, the ultrafast recovery rectifiers arerecommended because of their very fast reverse recoverytimes.Table 3. Comparative Information on RectifiersRectifierTechnologyForwardVoltage(Volts)Reverse RecoveryTime(nS)Forward RecoveryTime(nS)RelativeCostFast Recovery 1.0 150 1050 1.0UltraFast Recovery 0.9 75 50 1.5Megahertz 1.6 28 — 2.0Schottky 0.5

SMPSRMMethods of Control (continued)Another voltage-mode control method used inquasi-resonant switching power supplies is variablefrequency control as shown in Figure 23. This is avoltage-mode control since only the output voltage issensed and the output duty cycle (on or off times persecond) is controlled. This includes either fixed on-time,variable off-time (ZCS) or fixed off-time, variableon-time (ZVS). Examples of control ICs for this type ofcontrol are the MC34066P(ZCS) and MC34067P(ZVS).OSCREFSQRCURRENTFEEDBACKOUTPUTVinOUTPUTVOLTAGE FEEDBACKFigure 24. Current-Mode ControlREFVCOONESHOTVOLTAGE FEEDBACKLRFAULTCRFigure 23. Variable Frequency,Voltage-Mode ControlVoltage-mode control is the traditional method.Although it provides good output regulation (goodresponse to changes in the output load), it is somewhatsluggish to changes in the input voltage, and has troublesensing a core saturation condition.Current-Mode ControlCurrent-mode control is somewhat new. It senses notonly the output voltage, but the amount of current thatflows through the inductor or transformer. When theoutput demands more power, the controller allows morecurrent to enter the inductor or transformer. Conversely,if the input voltage suddenly changes, it is immediatelydetected by the controller and responds, keeping theoutput voltage at its required level. The common methodof current-mode control is called turn-on with clockcurrent-mode control. This means that the frequency ofoperation is determined by an oscillator whose onlypurpose is to start each “on” cycle.Current-mode controllers can be identified by theoutput of the error amplifier being placed into acomparator where the level of the current ramp is sensed(Is) as shown in Figure 24.This method of control is very fast and provides a verygood transient response time; that is, the time it takes torespond to changes on either the supply input or output.It tends to be a very robust control method, respondingquickly to short-circuit and overload conditions withoutfailures to the supply. Examples of these parts are theUC3842/3/4/5, MC34023, MC34025 and the MC34129.Gated Oscillator ControlGated oscillator control is a unique, but effectivemethod of control which is used on several of theON Semiconductor control ICs. The typical controlcircuit of this type is shown in Figure 25. It is a form ofvariable frequency control with pulse-by-pulseovercurrent limiting. The IC has a fixed frequencyoscillator, but its output is gated on or off depending uponwhether the output is below the needed output or abovethe needed output. It exhibits the robustness ofcurrent-mode control since each pulse is current limited.Examples of these types of parts are the UA78S40,MC34063A and MC34163.VinOVERCURRENTSENSEOSCCT onREFS QRVOLTAGE FEEDBACKFigure 25. Gated Oscillator ControlOUTPUThttp://onsemi.com22

Optoisolated Voltage FeedbackOptoisolators are utilized within switching powersupplies for passing signals over isolated boundaries.The areas of common usage are analog voltage feedbackacross isolated power circuits, drive signals to floatingdevices, and passing control signals between isolatedcircuits. Optoisolators are made up of a light emittingdiode (LED) and a transistor exposed to the LED’s lightvia a light path medium. Its primary parameter is thecurrent transfer ratio (CTR). This specifies how muchcurrent one can expect from the output given a currentbeing passed through the LED. Its unit is percent.The inclusion of isolated outputs and voltagefeedback circuits in high input voltages and off-lineswitching power supplies is required by the safetyregulatory agencies. Optoisolators are used mostfrequently for the isolated voltage feedback circuits.SMPSRMUnfortunately, because of the physical limitations of thetechnology, the optoisolator’s CTR can drift withtemperature and age. To compensate for this, an erroramplifier should be placed on the output prior to theoptoisolator. This will place the optoisolator inside thefeedback loop and compensate for any drift that occurswithin the optoisolator. A popular circuit whichaccomplishes this is shown in Figure 26.One issue that faces the designer with this method ofvoltage feedback is how much gain is used and where toplace the feedback loop compensation in the circuit sincethere are two error amplifiers within the loop. Since theTL431 is difficult to compensate, it is recommended thatthe TL431 be limited to half the needed high frequencygain and then place the compensation on the second erroramplifier within the controller IC.DIELECTRICBARRIERPRIMARY SIDECONTROL ICVREFSECONDARYSIDEVout (+)ERRORAMPMOC8101RLIM0.0110KR1CoutCOMPENSATIONTL431R2VoutRETURNFigure 26. Opto Isolated Voltage Feedback for Off-line Switching Power Supplieshttp://onsemi.com23

SMPSRMFirst-Pass Selection of SemiconductorsBy using Table 4, it is possible to make reasonablechoices for the power semiconductors prior to theswitching power supply being designed. Each topologypresents its own unique set of voltage and currentconditions which can be predicted with reasonablecertainty. This allows the designer to select the mostappropriate power semiconductors very early in thedesign cycle with a high degree of confidence. Earlyprocurement of these samples will avoid delivery delayswithin the design period.The results of each of the defined parameters outlinedin Table 4 should be considered as minimum parametervalues. Parameters such as breakdown voltage ratingsshould have a margin for any voltage spikes generated bythe supply.Table 4. Estimating the Significant Parameters of the Power SemiconductorsBipolar Power Switch MOSFET Power Switch Rectifier(s)Topology VCEO IC VDSS ID VR IFBuck Vin Iout Vin Iout Vin IoutBoostVout2.0P outV in(min)Vout2.0P outV in(min)VoutIoutBuck/BoostVin – Vout2.0P outV in(min)Vin – Vout2.0P outV in(min)Vin – VoutIoutFlyback1.7 Vin(max)2.0P outV in(min)1.5 Vin(max)2.0P outV in(min)10 Vout Iout1 Transistor Forward 2.0 Vin1.5 P outV in(min)2.0 Vin1.5 P outV in(min)3.0 Vout IoutPush-Pull2.0 Vin1.2 P outV in(min)2.0 Vin1.2 P outV in(min)2.0 Vout IoutHalf-BridgeVin2.0P outV in(min)Vin2.0P outV in(min)2.0 Vout IoutFull-BridgeVin1.2 P outV in(min)Vin1.2 P outV in(min)2.0 Vout Iouthttp://onsemi.com24

Other Design ConsiderationsSMPSRMTransformers and InductorsThe magnetic elements are the cornerstone of allswitching power supply designs but are also the leastunderstood. There are three types of magneticcomponents inside switching power supplies: aforward-mode transformer or a flyback-modetransformer, an AC filter inductor, and a DC filterinductor. Each has its own design approach. Although thedesign of each of these magnetic components can beapproached in an organized step-by-step fashion, it isbeyond the intent of this guide. For further informationregarding their design, refer to the “Practical SwitchingPower Supply Design” reference book.The design and the winding technique used in themagnetic component’s design has a great bearing on thereliability of the overall power supply. Two situationsarise from a poor transformer design; high voltage spikesare generated by the rate of transitions in current withinthe switching supply, and the possibility of coresaturation can arise during an abnormal operationalmode. Voltage spikes are caused by a physically “loose”winding construction of a transformer. The power supplydepends upon the quick transmission of transitions incurrent and voltage between the transformer windings.When the windings are physically wound distant fromone another, the leakage inductances store and release aportion of the energy inputted into a winding in the formof voltage spikes. It also delays the other windings fromseeing the transition in the drive winding. Spikes cancause the semiconductors to enter avalanche breakdownand the part can instantly fail if enough energy is applied.It can also cause significant Radio FrequencyInterference (RFI) problems. A snubber is usually thesolution, but this lowers the efficiency of the powersupply. Core saturation occurs when there are too fewturns on a transformer or inductor. This causes the fluxdensity to be too high and at high input voltages or longpulsewidths, the core can enter saturation. Saturation iswhen the core’s cross sectional area can no longer supportadditional lines of flux. This causes the permeability ofthe core to drop, and the inductance value to dropdrastically. This makes the inductor or winding stopbeing an AC current limiting device and it turns into ashort circuit. Hence, within microseconds, a nice linearcurrent ramp can go from a few amps to tens or hundredsof amps thus causing the semiconductor switch to fail.Indications of this condition can be determined byplacing an oscilloscope current probe on the winding andif the linear current waveform begins to exponentiallyrise upwards, then the saturation condition is beingentered. One then needs to revisit the design and in mostcases add more turns to the windings.http://onsemi.com25

SMPSRMOther Design Considerations (continued)CoresCores come in many shapes and sizes. The three mostcommon core types are shown in Figure 27. There aremany more types, but they are all based upon these basicstyles. Some of the important considerations whenselecting a core type are core material, cost, the outputpower of the power supply, the physical volume thetransformer or inductor must fit within, and the amountof RFI shielding the core must provide.For modern switching power supplies the commonlyused core materials are F, K, & N materials fromMagnetics, Inc., 3C8, & 3C85 from FerroxCube, Inc. orH7C4 & H7C40 materials from TDK. These ferritematerials offer the lowest core losses at the operatingfrequencies between 80 KHz to 1.0 MHz.When selecting the style of the core, the designershould not only consider the initial cost of the core itself,but the labor costs associated with manufacturing thetransformer or inductor. Bobbin style cores are generallymore expensive to buy, but generally require less labor tomanufacture. Torroid cores are less expensive initially,but require special equipment to manufacture thetransformer or inductor and more labor.Torroid cores radiate less RFI energy than many ofbobbin cores, and thus may aid in the physical RFI designlater in the design. For transformers that require airgaps,some ferrite, bobbin cores offer better RFI shielding thanothers, such as the pot core and those cores derived frompot cores. The pot core offers less wire winding area thanthe E-E core families. So tradeoffs abound at this stage ofthe design.One thing to keep in mind during this phase of aswitching power supply design is that it is next toimpossible to make a wrong choice since all of the corescan be made to work in the applications. Even thedeterminations of the number of turns should beconsidered a calculated guess. Only the turns on thesecondary of a transformer need to be somewhat precisein order to get the output voltages needed by the powersupply.Note: Finished inductive devices are easy to order inlarge volume from several winding suppliers.A. TORROID B. E-E COREC. POT COREFigure 27. Common Core Typeshttp://onsemi.com26

SMPSRMOther Design Considerations (continued)Snubbers and ClampsSnubbers and clamps are used for two very differentpurposes. When misapplied, the reliability of thesemiconductors within the power supply is greatlyjeopardized.A snubber is used for reducing the level of a voltagespike and decreasing the rate of change of a voltagewaveform. This has its benefits in the Safe OperatingArea (SOA) of the semiconductors, and it lowers thespectral content of any radiated RFI thus radiating lessRF energy.A clamp is used only for reducing the level of a voltagespike. It has no affect on the dV/dt of the transition.Therefore it is not very useful for reducing RFI. It is usefulfor preventing components such as semiconductors andcapacitors from entering avalanche breakdown.Bipolar power transistors suffer from currentcrowding which is an instantaneous failure mode. If avoltage spike occurs during the turn-off voltagetransition of greater than 75 percent of its VCEO rating, itmay have too much current crowding stress. Here boththe rate of change of the voltage and the peak voltage ofthe spike must be controlled. A snubber is needed to bringthe transistor within its RBSOA rating.Typical snubber and clamp circuits are shown inFigure 28. The effects that these have on a representativeswitching waveform are shown in Figure 29.ZENERCLAMPSOFTCLAMPSNUBBERSNUBBERSOFTCLAMPZENERCLAMPFigure 28. Common Methods for Controlling Voltage Spikes and/or RFIVOLTAGE (VOLTS)CLAMPORIGINALWAVEFORMSNUBBERt, TIME (µsec)Figure 29. The Effects of a Snubber versus a Clamphttp://onsemi.com27

SMPSRMOther Design Considerations (continued)The Printed Circuit Board LayoutThe printed circuit board (PCB) layout is the thirdmost sensitive portion of every switching power supplydesign following the basic design and the magneticsdesign. The lack of quality in its layout can adverselyaffect RFI radiation, component reliability, efficiencyand stability.First, all PCB traces exhibit inductance and resistance.These can cause high voltage transitions whenever thereis a high rate of change in current flowing through thetrace. For operational amplifiers sharing a trace withpower signals, it means that the supply would beimpossible to stabilize. For traces that are too narrow forthe current flowing through them, it means a voltage dropfrom one end of the trace to the other which potentiallycan be an antenna for RFI.There are two rules of thumb for PCB layouts: “shortand fat” for all power carrying traces and “one pointgrounding” for the three different types of grounds withina switching power supply. Traces that are short and fatminimize the inductive and resistive aspects of the trace,thus reducing noise within the circuits and RFI. One pointgrounding keeps the noise sources separated from thesensitive control circuits. The three types of grounds arethe input power return ground, the output power returnground and the low-level control ground.Attention should be paid to the layout around the filtercapacitors. If paralleled capacitors are in a line, thecapacitor closest to the source of the ripple current willget hot, the other won’t see this level of AC current andthus won’t evenly share the ripple current. Any paralleledcapacitors should be laid out radially symmetric aboutthe ripple current source which is typically a rectifier orpower switch.Off-line Switching Power Supply Designand Safety TipsAny power supply that operates from an input voltageof greater than 30 VAC or 42.5 VDC is considered ahazard to its operator and must be inspected, qualified,and approved by the relevant safety regulatory body forthe anticipated market. In the U.S. it is UL, in Canada itis the CSA, and in Europe VDE is the common agency.Designing for safety has definite affects on the physicaldesign of the switching power supply. One should pursueknowledgeable consultants or acquire the relevant safetyspecifications.Safety factors affect the design and construction of thepower supplies. The key factors are the physicalseparation of the input power source to the outputs andany component that allows the passing of 50/60 Hz ACcurrent from the input to the output. The construction anddesign of the transformer, PCB and the enclosure areaffected. Schematically it is the input filter design and thefeedback and signaling design.The important terms used by the regulatory agenciesare, creepage, clearance, dielectric strength or Hipot.Creepage is the distance between two isolated pointsalong a surface. Clearance is the separation distancebetween two isolated points in air. Dielectric strength isthe voltage breakdown testing of all components that areconnected between isolated circuits. The test consists ofapplying a high AC or DC voltage between the input andthe output and earth ground and checking that the currentconducted is less than the specified amount. It isrecommended that a DC HIPOT test be used when testingall switching power supplies due to possible ACavalanche problems.When the designer is debugging an off-line powersupply on the bench, several personal safety precautionsmust be followed.• Use an isolation transformer between the wall socketand the power supply.• Float the earth ground leads on the power cords ofALL test equipments.• Do not hook the scope or test equipments betweengrounds. Disconnect all signal wires and relocatethem.http://onsemi.com28

SWITCHMODE Power Supply ExamplesSMPSRMThis section provides both initial and detailed information to simplify the selection and design of a variety ofSWITCHMODE power supplies. The ICs for Switching Power Supplies figure identifies control, reference voltage,output protection and switching regulator ICs for various topologies.ICs for Switching Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Integrated circuits identified for various sections of a switching power supply.Suggested Components for Specific Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31A list of suggested control ICs, power transistors and rectifiers for SWITCHMODE power supplies by application.• CRT Display System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32• AC/DC Power Supply for CRT Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33• AC/DC Power Supply for Storage, Imaging & Entertainment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33• DC–DC Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34• Typical PC Forward–Mode SMPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Real SMPS Applications80 W Power Factor Correction Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Compact Power Factor Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Monitor Pulsed–Mode SMPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3870 W Wide Mains TV SMPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40100 W Wide Mains TV SMPS with 1.3 W Stand–by . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42Low–Cost Off–line IGBT Battery Charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44110 W Output Flyback SMPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Efficient Safety Circuit for Electronic Ballast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47Lamp Ballast with Power Factor Correction (Evaluation Board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49AC–DC Battery Charger – Constant Current with Voltage Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51Some of these circuits may have a more complete application note, spice model information or even an evaluation boardavailable. Consult ON Semiconductor’s website (http://onsemi.com) or local sales office for more information.Pagehttp://onsemi.com29

SMPSRMFigure 30. Intergrated Ciruits forSwitching Power SuppliesOUTPUT FILTERSDC–DC CONVERSIONOUTPUTPROTECTIONMC34063AMC34163MC34166MC34167LM2574/5/6MC33463MC33466MC3423MC3425MC33064MC33164MC33161MC33464MC33465MBRS240LMBRS360MBR360MBRD360MURS360MUR360MBR1100MURHB860CT/T4MURHF860CTPOWER SWITCHESSNUBBER/CLAMP1.5KExxxAMUR160MURS160P6SMB1x0AP6KE1x0AMMG05N60DMTB3N60ET4MTD1N60EMTP1N60EMTB2N60EMTP2N60EMTP3N60EMTP6N60EPOWER FACTORCORRECTIONMC33262MC33368MC332601N400xMUR1100MRA400xPOWER FACTOR POWER SNUBBER/ TRANS– OUTPUTOUTPUTVOLTAGECORRECTIONSWITCH CLAMP FORMERS FILTERS PROTECTION REGULATIONV refDC–DCCONVERSIONPWMMC78TXXADJUSTABLELM317LLM2931CLP2951LM317MLM337MMC33269LM317LM337LM350MC33160MC33263MC33275MC33375MC78MxxMC79MxxMC33267MC33268MC33269MC78xxMC79xxFIXEDMC78FCxxMC78LCxxMC78BCxxMC78PCxxMC33264LM2931LP2950LP2951MC78LxxMC79LxxREFOSCVOLTAGEFEEDBACKCONTROLSTARTUPTL431/A/BMC33202MC3341MC33065MC33023MC33025MC33066MC44603AMC44604MC33362MC33363A/BMC33365VOLTAGEFEEDBACKMC44605MC44608MC33364 MC33067UC3842B – UC3845BMMBZ52xxMMSZ52xxMMSZ46xxSWITCHING REGULATORSSCG’s Integrated SolutionsVOLTAGE REGULATIONCONTROLSTARTUPFigure 30. Integrated Circuits for Switching Power Supplieshttp://onsemi.com30

SMPSRMMonitorMCURWM1010110010112C BUSOn Screen DisplayGeneratorV_SyncH_SyncSYNC PROCESSORPWMor 12COverlayedRGBRGBRGGeometry CorrectionIRF630 / 640 / 730 /740 / 830 / 840Timebase Processor1280x1024V_SyncH_SyncMEMORYDOWNUSB HUBUPUSB & Auxiliary StandbyLineA.C.MTP8N60EH_SyncPFC DevicesBHC05CPUCORERGBMC33363A/BAC/DCPower SupplyV_SyncMC34262MC33368S.M.P.SControllerUC3842MC44603/5MC44608SyncSignalMUR420MUR440MUR460RVideoDriverGRGBBVerticalDriverH–DriverFigure 31. 15” Monitor Power SuppliesH–Driver TRIRF510/11MTD6N10/15Line DriverDC TO DCCONTROLLERH–Output TRMFW16212MJL16218UC3842/3IRF630/740MTP6P20ECRTDamper DiodeMUR10150EMUR5150EMUR8100EMUR4100EMUR460Figure 31.15”MonitorPowerSuppliesMC33260http://onsemi.com31

SMPSRMACLineRectifier+Start–upSwitchBulkStorageCapacitorPWMControlICPWM SwitcherUltrafastRectifierMOSFETFigure 32. AC/DC Power Supply for CRT Displays+Prog.Prec.RefLoadn–outputsTable 5.Part # Description Key Parameters Samples/Prod.MC33262 PFC Control IC Critical Conduction PFC Controller Now/NowMC33368 PFC Control IC Critical Conduction PFC Controller + Internal Start–up Now/NowMC33260 PFC Control IC Low System Cost, PFC with SynchronizationCapability, Follower Boost Mode, or Normal ModeNow/NowMC33365 PWM Control IC Fixed Frequency Controller + 700 V Start–up, 1 APower SwitchNow/NowMC33364 PWM Control IC Variable Frequency Controller + 700 V Start–up Switch Now/NowMC44603A/604 PWM Control IC GreenLine, Sync. Facility with Low Standby Mode Now/NowMC44605 PWM Control IC GreenLine, Sync. Facility, Current–mode Now/NowMC44608 PWM Control IC GreenLine, Fixed Frequency (40 kHz, 75 kHz and 100kHz options), Controller + Internal Start–up, 8–pinNow/2Q99MTP6N60E MOSFET 600 V, 6 A, Rds (on) = 1.2 V Now/NowMTW14N50E MOSFET 500 V, 14 A, Rds (on) = 0.4 V Now/NowMSR860 Ultrasoft Rectifier 600 V, 8 A, trr = 55 ns, Ir max = 1 uA Now/NowMUR440 Ultrafast Rectifier 400 V, 4 A, trr = 50 ns, Ir max = 10 uA Now/NowMRA4006T3 Fast Recovery Rectifier 800 V, 1 A, Vf = 1.1 V @ 1.0 A Now/NowMR856 Fast Recovery Rectifier 600 V, 3 A, Vf = 1.25 V @ 3.0 A Now/Nowhttp://onsemi.com32

SMPSRMACLineRectifier+Start–upSwitchBulkStorageCapacitorPWMControlICPWM SwitcherUltrafastRectifierMOSFETFigure 33. AC/DC Power Supply for Storage,Imaging & Entertainment+Prog.Prec.RefLoadn–outputsTable 6.Part # Description Key Parameters Samples/Prod.MC33363A/B/65 PWM Control IC Controller + 700 V Start–up & Power Switch, < 15 W Now/NowMC33364 PWM Control IC Critical Conduction Mode, SMPS Controller Now/NowTL431B Program Precision Reference 0.4% Tolerance, Prog. Output up to 36 V, TemperatureCompensatedNow/NowMTP6N60E MOSFET 600 V, 6 A Rds (on) = 1.2 Now/NowMSRD620CT Ultrasoft Rectifier 200 V, 6 A, trr = 55 ns, Ir max = 1 uA Now/NowMR856 Fast Recovery Rectifier 600 V, 3 A, Vf = 1.25 V @ 3.0 A Now/Nowhttp://onsemi.com33

SMPSRM+V in–Control ICLoCoVoltageRegulation+V out–LoadLo++V in Co VControl ICout––LoadBuck RegulatorSynchronous Buck RegulatorFigure 34. DC – DC ConversionTable 7.Part # Description Key Parameters Samples/Prod.MC33263Low Noise, Low DropoutRegulator IC150 mA; 8 Outputs 2.8 V – 5 V; SOT 23L 6 LeadPackageNow/NowMC33269 Medium Dropout Regulator IC 0.8 A; 3.3; 5, 12 V out; 1 V diff; 1% Tolerance Now/NowMC33275/375 Low Dropout Regulator 300 mA; 2.5, 3, 3.3, 5 V out Now/2Q99LP2950/51 Low Dropout, Fixed Voltage IC 0.1 A; 3, 3.3, 5 V out; 0.38 V diff; 0.5% Tolerance Now/NowMC78PCCMOS LDO Linear VoltageRegulatorIout = 150 mA, Available in 2.8 V, 3 V, 3.3 V, 5 V; SOT23 – 5 LeadsNow/NowLM2574/75/76 Control IC w/integrated FET 0.5 – 3 A; 7 – 40 V in; 3.3, 5, 12, 15 & adj out Now/NowMC33470 Synchronous Buck Regulator IC Digital Controlled; Vcc = 7 V; Fast Response Now/NowMMDFS2P102R2 P–Ch FET w/Schottky in SO–8 20 V, 2 A, 160 m FET/1 A, Vf = 0.46 V Schottky Now/NowMMDFS6N303R2 N–Ch FET w/Schottky in SO–8 30 V, 6 A, 35 m FET/3 A, Vf = 0.42 V Schottky Now/NowMMDFS3P303R2 P–Ch FET w/Schottky in SO–8 30 V, 3 A, 100 m FET/3 A, Vf = 0.42 V Schottky Now/NowMBRM140T31A Schottky in PowermitePackage40 V, 1 A, Vf = 0.43 @ 1 A; Ir = 0.4 mA @ 40 V Now/NowMBRA130LT3 1A Schottky in SMA Package 40 V, 1 A, Vf = 0.395 @ 1 A; Ir = 1 mA @ 40 V Now/NowMBRS2040LT3 2A Schottky in SMB Package 40 V, 2 A, Vf = 0.43 @ 2 A; Ir = 0.8 mA @ 40 V Now/NowMMSF3300 Single N–Ch MOSFET in SO–8 30 V, 11.5 A(1), 12.5 m @ 10 V Now/NowMMSF3302 Single N–Ch MOSFET in DPAK 30 V, 18.3 A(1), 10 m @ 10 V Now/NowMTSF2P03HDMGSF3454X/VMGSF3441X/VSingle P–Ch MOSFET inMicro 8 PackageSingle N–Ch MOSFET inTSOP–6Single P–Ch MOSFET inTSOP–630 V, 2.7 A, 90 m @ 10 V Now/Now30 V, 4.2 A, 65 m @ 10 V Now/Now20 V, 3.3 A, 100 m @ 4.5 V Now/Now(1) Continuous at T A = 25° C, Mounted on 1” square FR–4 or G10, V GS = 10 V t 10 secondshttp://onsemi.com34

SMPSRMPackagePackageTO–220Part No. V RRM(V)Io(A)MBR2535CTL 35 25AxialPart No. VRRM(V) Io(A)MBR160 60 1+3.3 V 14 APackageTO–220TO–220TO–220TO–220TO–218TO–247Package+Part No. V RRM(V)I (A)o AxialMBR2535CTL 35 2525Part No. VRRM(V) Io(A)IN540x Series 400 1000 330253030MBR2545CT 45MBR3045ST 45MBRF2545CT 45MBR3045PT 45MBR3045WT 45+5 V 22 A++Mains230 VacPackageTO–220TO–220TO–220TO–220TO–220TO–220Part No. V RRM(V) I (A)oMBR2060CT 60 20MBR20100CT 100 20MBR20200CT 200 20MUR1620CT 200 16MUR1620CTR 200 16MURF1620CT 200 165 V 0.1 AVoltageStand–by+12 V 6 A+–5 V 0.5 APart No. PackagePackageSMCDPAKAxialAxialAxialPart No. V RRM(V) I (A)oMBRS340T3 MBRD340 40 40 331N5821 30 31N5822 40 3MBR340 40 3+PWMIC–12 V 0.8 A+DIP8/SO–8/SO–14DIP14/SO–14DIP16/SO–16DIP16/SO–16DIP16/SO–16DIP8U384X SeriesMC34060TL494TL594MC34023PackageDIP16/SO–16DIP16/SO–16MC44608MC44603MC44603AAxialPart No. V Io(A)RRM(V)MBR3100 100 3MATRIXMOSFETPackageIp(A)PackagePart No.D2PAK/TO–220TO–220TO–220647Part No. VDSS(V)MTB/P6N60E 600MTP4N80E MTW7N80E 800800TO–92TL431Figure 35. Typical 200 WATX Forward Mode SMPSPart No. VRRM(V) Io(A) PackageMUR1xxxE Series 600 1000 1 AxialMUR4xxxE Series 600 1000 4 AxialMR7xxx Series 600 1000 6 Axial1N4937 600 1 AxialFigure 35. Typical 200 W ATX Forward Mode SMPShttp://onsemi.com35

SMPSRMApplication: 80 W Power Factor Controller92 to138 VacRFIFILTERD2D11D4D3C5ZERO CURRENTDETECTOR+2.5 VREFERENCE+1.2 V1.6 V/1.4 VUVLO36 V6.7 V+ 13 V/8.0 V100 kR685+1N4934D6100C422 kR4TMUR130D5VODELAYTIMERR 16 V230 V/10MTP70.35 ADRIVE8N50E+OUTPUT Q110RSLATCH220C30.01C22.2 MR57.5 kR33CURRENTSENSECOMPARATOR1.5 VMULTIPLIEROVERVOLTAGECOMPARATOR20 k10 pF+ 1.08 V refERROR AMP10 A +V refQUICKSTART410.1R71.0 MR211 kR16 20.68C1Figure 36. 80 W Power Factor ControllerFeatures:Reduced part count, low–cost solution.ON Semiconductor Advantages:Complete semiconductor solution based around highly integrated MC33262.Devices:Part NumberDescriptionMC33262Power Factor ControllerMTP8N50ETMOS Power MOSFETMUR130 Axial Lead Ultrafast Recovery Rectifier (300 V)TransformerCoilcraft N2881–APrimary: 62 turns of #22 AWGSecondary: 5 turns of #22 AWGCore: Coilcraft PT2510Gap: 0.072” total for a primary inductance (Lp) of 320 Hhttp://onsemi.com36

SMPSRMApplication: Compact Power Factor CorrectionVccFUSE 0.33 µFAC LINE100 nFMAINSFILTER1N540410 µF/16 V+L1MUR460Vout+100 µF/450 V18100 nF23MC332607610 MTP8N50E12 k451 M0.5 /3 W120 pF45 k 1 MFigure 37. Compact Power Factor CorrectionFeatures :Low–cost system solution for boost mode follower.Meets IEC1000–3–2 standard.Critical conduction, voltage mode.Follower boost mode for system cost reduction – smaller inductor and MOSFET can be used.Inrush current detection.Protection against overcurrent, overvoltage and undervoltage.ON Semiconductor advantages:Very low component count.No Auxiliary winding required.High reliability.Complete semiconductor solution.Significant system cost reduction.Devices:Part NumberDescriptionMC33260Power Factor ControllerMTP8N50ETMOS Power Field Effect Transistor (N–Channel)MUR460 Ultrafast Recovery Rectifier (600 V)1N5404 General Purpose Rectifier (400 V)http://onsemi.com37

SMPSRMApplication: Monitor Pulsed–Mode SMPS90 Vac to270 VacRFIFILTER1 nF/500 V1 nF/1 kV4.7 MMR85647 µF22 µH90 V/0.1 A+ +47 µF1 D1 – D41N5404 150 µF400 VVin3.9 k/6 W120 pF4.7 k1N414822nF56 k1 nF/500 VSYNC3.3 k1.2 k92.2 nF104.7 µF 2.2 k+118.2 k124701N4148k1356 k2.2 nF14151610 k2W22 k47 µF25 VMC44605P8765560 k4321+10 pF470 pF10 270 47 k4.7 µF+10 V1N49341 µH4.7 µF+10 V150 kMTP8N50E1 k470 1N4934100 nFMR8560.1 SMT31Lp470 pF1N4934 MCR22–6MR856+1000 µFMR852+1000 µFMR852+220 µFMBR360+4700 µF45 V/1 A15 V/0.8 A–10 V/0.3 A8 V/1.5 A1.8 MMOC8107100 10 k96.8 kVin2.7 k12 VTL431100 nF2.7 k1 kBC237B100 nFV PFROM P0: STAND–BY1: NORMAL MODEFigure 38. Monitor Pulsed–Mode SMPShttp://onsemi.com38

SMPSRMFeatures:Off power consumption: 40 mA drawn from the 8 V output in Burst mode.Vac (110 V) about 1 wattVac (240 V) about 3 wattsEfficiency (pout = 85 watts)Around 77% @ Vac (110 V)Around 80% @ Vac (240 V)Maximum Power limitation.Over–temperature detection.Winding short circuit detection.ON Semiconductor Advantages:Designed around high performance current mode controller.Built–in latched disabling mode.Complete semiconductor solution.Devices:Part NumberDescriptionMC44605PHigh Safety Latched Mode GreenLine ControllerFor (Multi) Synchronized ApplicationsMTP8N50ETMOS E–FET Power Field Effect Transistor (N–Channel)TL431Programmable Precision ReferenceMR856 Fast Recovery Rectifier (600 V)MR852 Fast Recovery Rectifier (200 V)MBR360 Axial Lead Schottky Rectifier (60 V)BC237BNPN Bipolar Transistor1N5404 General–Purpose Rectifier (400 V)TransformerG6351–00 (SMT31M) from Thomson OregaPrimary Inductance: 207 HArea: 190 nH/turns2Primary Turns: 33Turns (90 V): 31http://onsemi.com39

SMPSRMApplication: 70 W Wide Mains TV SMPS95 Vac to265 VacC30100 nF250 VacLF1RFIFILTERF1FUSE 1.6 AC191 nF/1 kVR322 kC4–C51 nF/1 kVC9100 nFR151 MR43.9 kR52.2 kR1447 kD151N4148D1–D41N40079C8 560 pF10C10 1 µF11R185.6 kC710 nF1213141516R1310 kR768 k/1 WMC44603AP3.8 M87654321C121 nFC16100 µFR1927 kC11100 pF R2215 k180 kR20 47R9 1501 kC1220 FD131N4148L11 µHR1668 k/2 W C15 220 pF L322 µH 115 V/0.45 AR81 kR330.31 C264.7 nFD7IN4937Q1MTA4N60ER214.7 MC14220 pFD12MR856 C2047 µFD5MR854D8MR854D2347 µF15 V/1.5 AC211000 µF11 V/0.5 AC221000 µFOREGA TRANSFORMERG6191–00THOMSON TV COMPONENTSFigure 39. 70 W Wide Mains TV SMPShttp://onsemi.com40

SMPSRMFeatures:70 W output power from 95 to 265 Vac.Efficiency@ 230 Vac = 86%@ 110 Vac = 84%Load regulation (115 Vac) = 0.8 V.Cross regulation (115 Vac) = 0.2 V.Frequency 20 kHz fully stable.ON Semiconductor Advantages:DIP16 or SO16 packaging options for controller.Meets IEC emi radiation standards.A narrow supply voltage design (80 W) is also available.Devices:Part NumberDescriptionMC44603APEnhanced Mixed Frequency ModeGreenLine PWM ControllerMTA4N60ETMOS E–FET Power Field Effect Transistor (N–Channel)MR856 Fast Recovery Rectifier (600 V)MR854 Fast Recovery Rectifier (400 V)1N4007 General Purpose Rectifier (1000 V)1N4937 General Purpose Rectifier (600 V)TransformerThomson Orega SMT18http://onsemi.com41

SMPSRMApplication: Wide Mains 100 W TV SMPS with 1.3 W TV Stand–byC31100 nF47283900 R F6RFIFILTERF1C192N2F–YC31 nFR16 4.7 M/4 kVIsense1234C41 nFD51N4007R5 100 kMC44608P75R4 3.9 kD1–D41N54048765C8100 nFVccR210 +C5220 F400 VD6MR856D71N4148+ C722 F16 VR122 k5WC647 nF630 V67C9470 pF630 VD14MR856R172.2 k5 W121412111089C11220 pF/500 VD18 MR856C1247 µF/250 V+R7 47 kΩ C17 120 pFD9 MR852C14 +1000 µF/35 VC16100 pFD121N4934D10+MR852C151000 µF/16 VR1918 kC13100 nFDZ1MCR22–6R121 k112 V/0.45 A16 V/1.5 A8 V/1 AD131N4148C18100 nF123123J3J4R30.27 R21 47 R9100 kONOFFR1147 kOPT1DZ310 V DZ2TL431CLPC1933 nFR1010 kR82.4 kON = Normal modeOFF = Pulsed modeFigure 40. Wide Mains 100 W TV SMPS with SecondaryReconfiguration for 1.3 W TV Stand–byhttp://onsemi.com42

SMPSRMFeatures:Off power consumption: 300mW drawn from the 8V output in pulsed mode.Pin = 1.3W independent of the mains.Efficiency: 83%Maximum power limitation.Over–temperature detection.Demagnetization detection.Protection against open loop.ON Semiconductor Advantages:Very low component count controller.Fail safe open feedback loop.Programmable pulsed–mode power transfer for efficient system stand–by mode.Stand–by losses independent of the mains value.Complete semiconductor solution.Devices:Part NumberDescriptionMC44608P75GreenLine Very High Voltage PWM ControllerMTP6N60ETMOS Power Field Effect Transistor (N–Channel)TL431Programmable Precision ReferenceMR856 Fast Recovery Rectifier (600 V)MR852 Fast Recovery Rectifier (200 V)1N5404 General Purpose Rectifier (400 V)TransformerSMT19 40346–29 (9 slots coil former)Primary inductance: 181 mHNprimary: 40 turnsN 112 V: 40 turnsN 16 V: 6 turnsN 8 V: 3 turnshttp://onsemi.com43

SMPSRMApplication: Low–Cost Offline IGBT Battery Charger130 to 350 V DC+R3220 kR1150R13100 kD11N4148C101 nFD4C3220 F/10 VD3MBRS240LT3D5 R2++C2220 F/10 V8 V at 400 mA–+C310 F/350 VR1120 kM1MMG05N60DR51 kMC14093R51N49371N4148IC1MOC8103150R11113 k0 VC710 FD212 V+C51 nF1.2 kQ1MBT3946DWR9470C91 nFR23.98 7 6 5MC33341R9100 Q5R10+C81 F1 2 3 4 D4C412 V47 nFR1220 kFigure 41. Low–Cost Offline IGBT Battery ChargerFeatures:Universal ac input.3 Watt capability for charging portable equipment.Light weight.Space saving surface mount design.ON Semiconductor Advantages:Special–process IGBT (Normal IGBTs will not function properly in this application).Off the shelf components.SPICE model available for MC33341.Devices:Part NumberDescriptionMMG05N60DInsulated Gate Bipolar Transistor in SOT–223 PackageMC33341Power Supply Battery Charger Regulator Control CircuitMBT3946DWDual General Purpose (Bipolar) TransistorsMBRS240LT3Surface Mount Schottky Power RectifierMC14093Quad 2–Input “NAND” Schmitt Trigger1N4937 General–Purpose Rectifier (600 V)http://onsemi.com44

SMPSRMApplication: 110 W Output Flyback SMPS180 VAC TO 280 VAC C31 nF / 1 KVRFIFILTERR11 / 5 WC4–C71 nF / 1000 VR34.7 kC32220 pFD1–D41N4007C2220 FC1100 FD51N4934C1747 nFR2022 k5 WD8MR856C30100 F120 V / 0.5 AC310.1 FC9C10R1510 kC111 nFR1610 k820 pF1 FR268 k / 2 W9101112131415MC44603P8765432C151 nFR427 kC16100 pFR7180 kR815 kR1010 R91 kL11 HD61N4148C144.7 nFMTP6N60ED7MR856R51.2 kR6180 R261 kLauxLPC29220 pFD9MR852C271000 FC26220 pFD10MR852C251000 F28 V / 1 AC280.1 F15 V / 1 AC240.1 F161C23220 pFR1827 kR1910 kC13100 nFR142 X 0.56 //D11MR852C211000 F8 V / 1 AC220.1 FR1710 kMOC8101R24270 R23117.5 kR2110 kC19100 nFD141N4733R251 kC126.8 nFTL431C2033 nFR222.5 kFigure 42. 110 W Output Flyback SMPShttp://onsemi.com45

SMPSRMFeatures:Off–line operation from 180 V to 280 Vac mains.Fixed frquency and stand–by mode.Automatically changes operating mode based on load requirements.Precise limiting of maximum power in fixed frequency mode.ON Semiconductor Advantages:Built–in protection circuitry for current limitation, overvoltage detection, foldback, demagnetization and softstart.Reduced frequency in stand–by mode.Devices:Part NumberDescriptionMC44603PMTP6N60EEnhanced Mixed Frequency Mode GreenLine PWM ControllerTMOS E–FET Power Field Effect Transistor (N–Channel)MR856 Fast Recovery Rectifier (600 V)MR852 Fast Recovery Rectifier (200 V)TL431Programmable Precision Reference1N4733A Zener Voltage Regulator Diode (5.1 V)1N4007 General Purpose Rectifier (1000 V)http://onsemi.com46

SMPSRMApplication: Efficient Safety Circuit for Electronic BallastC13 100 nF250 V R18 PTCC12 22 nFC14 100 nF250 VAGNDC11 4.7 nF1200 VPTUBE =55 WQ2BUL44D2L1 1.6 mHT1AFT063Q3BUL44D2R132.2 RR142.2 RC92.2 nFR114.7 RC82.2 nFR124.7 RC6 10 nFT1BD3 1N4007DIACD4R1010 RC7 10 nFT1CNOTES: * All resistors are ± 5%, 0.25 Wunless otherwise noted* All capacitors are Polycarbonate, 63 V,± 10%, unless otherwise notedR9330 kC4 47 F+C5 0.22 FR7 1.8 M450 VP1 20 kC15 100 nFD2 MUR180ET2D1MUR120R4 22 k+R38100 k/1.0 WR2 1.2 MQ1MTP4N50E3 12AGNDC2330 F25 V5 7U1MC3426234261C1 10 nFR6 1.0 RR5 1.0 RC3 1.0 FR1 12 kD8D7FUSEC1647 nFC17 47 nF630 VLINE220 VD9630 VD6FILTERFigure 43. Efficient Safety Circuit for Electronic Ballasthttp://onsemi.com47

SMPSRMFeatures:Easy to implement circuit to avoid thermal runaway when fluorescent lamp does not strike.ON Semiconductor Advantages:Power devices do not have to be oversized – lower cost solution.Includes power factor correction.Devices:Part NumberDescriptionMC34262Power Factor ControllerMTP4N50E TMOS E–FET Power Field Effect Transistor (N–Channel)MUR120 Ultrafast Rectifier (200 V)BUL44D2 Bipolar Transistor* for Electronic Lamp Ballast (400 V)1N4007 General Purpose Diode (1000 V)1N5240B Zener Voltage Regulator Diode (10 V)*Other Lamp Ballast Options:1, 2 Lamps 3, 4 Lamps825 V BUL642D2BUB642D2BUL642D2BUB642D2100 V MJD18002D2 MJB18004D2MJE18004D21200 V MJD18202D2 MJB18204D2MJE18204D2ON Semiconductor’s H2BIP process integrates a diode and bipolar transistor for a single package solution.http://onsemi.com48

SMPSRMApplication: Lamp Ballast with Power Factor Correction(Evaluation Board)D191N4148C11R35C15 10 RD647 nFC1322 nF100 nF220 nFC16 100 nFR10 330 kR11C14R13R14C17R1215 V GND D8 MUR160100 nFC121C202345678VddVrefCPHRPHCSWPCOPIOPDTAVHOVOUTN/CVLOGNDRESETSTD161514131211109GND22 RC18100 nFGNDC2710 nF22 kD181N4148TL1FLUO TUBETL2FLUO TUBEC25C1915 k100 nF434310 nFR25C26U2MC33157DWD12D141N4148R23R1922 R1N4148R20100 R1N4148GNDGNDGNDQ4MTP8N50EC221500 pF/500 VGNDQ3MTP8N50EL31.5 mHR21 R261N4148GNDD16 1N4148R2933 kR34GND1N4148R24R17100 nF/450 VR31O R470 k+C28C29100 k100 kC26Q2MTP6N50ED4MUR160GNDD17R331 M1 M1212R28R3033 kGNDR162.2 MR18R32R81 MR220 RD13D130 R6800 pF/1000 V/5%10 kR4R710 RD51N4148GNDGNDR361 kC5+100 k100 nFVdd Vsync3 Osc Gdrive7U2MC332602Vctrl S 4GND V S85GNDR610 kT1100 k820 k100 kVbootC761C8220 nF270 pFF12A – TD FUSEGNDIC2100 nF/630 VC3C4LINE/PLINE/ND10Vz 15 VC3022 F/25 VGNDFILTERSEMAP27 mH/1 ABRIDGE 2A/800 VD1+470 pF/5%82 k6800 pF/1000 V/5%R50 RGNDL2R150 R22 F/25 VR1820 kR91 MGND+R27470 k2.2 ML41.5 mHC31680 nF/ 630 V22 F/450VR268 k/0.5 WD21N4007C24100 nF/450 VR321 R/2 W100 nF/630 VD31N400725 F/35 VGNDFigure 44. Lamp Ballast with Power Factor Correction(Evaluation Board)http://onsemi.com49

SMPSRMFeatures :Evaluation board includes all functions for an electronic ballastIncludes power factor correctionON Semiconductor advantages:Very low component countBuilt–in 2% voltage reference eliminates the need for external compensation over the temperature rangeComplete semiconductor solutionDevices:Part NumberDescriptionMC33157DWElectronic Ballast ControllerMC33260Power Factor ControllerMTP8N50ETMOS Power Field Effect Transistor (N–Channel)MTP6N50ETMOS Power Field Effect Transistor (N–Channel)MUR160 Axial Lead Ultrafast Recovery Rectifier (600 V)MUR460 Ultrafast Recovery Rectifier (600 V)1N4007General Purpose Rectifier (1000 V), 2 A/800 V Bridgehttp://onsemi.com50

SMPSRMApplication: AC–DC Battery Charger – Constant Current withVoltage LimitJ11T0.2xF1D1250R5U1C3100 nF2+LINE10 F/350 VC110 V R12201N4140D3+R2D2 C2 20 F 4 kD4BZX84/18V1N4140R38Line7VCCMC33364GNDC3Vref FL4 31ICD6222 k1N4140R4330D5R647 kD6R547 kC41 nFMURS160T3R72.7MOC01025432R8100T16Q1MTD1N60E1SO1542171N4140D8 C5 + 4 kD91 FBZX84/5 V100 F +D7MURS320T3C5U2R10100 RR48 7 6 5MC333411 2 3 4C733 nFR110.255 VDOV CCCSIVSICSICTACMPGNDR1422 kR1312 kR1210 kJ212Figure 45. AC–DC Battery Charger – Constant Current with Voltage LimitFeatures:Universal ac input.9.5 Watt capability for charging portable equipment.Light weight.Space saving surface mount design.ON Semiconductor Advantages:Off the shelf componentsSPICE model available for MC33341Devices:Part NumberDescriptionMC33341Power Supply Battery Charger Regulator Control CircuitMC33364Critical Conduction SMPS ControllerMURS160T3 Surface Mount Ultrafast Rectifier (600 V)MURS320T3 Surface Mount Ultrafast Rectifier (200 V)MTD1N60E TMOS Power MOSFET DPAK N–Channel (600 V)BZX84C5V1LT1 Zener Voltage Regulator Diode (5.1 V)BZX84/18VZener Voltage Regulator Diode (MMSZ18T1)TransformerFor details consult AN1600http://onsemi.com51

SMPSRMLiterature Available from ON SemiconductorApplication NotesThese older Application Notes may contain part numbers that are no longer available, but the applications informationmay still be helpful in designing an SMPS. They are available through the Literature Distribution Center for ONSemiconductor at 800–344–3860 or 303–675–2175 or by email at ONlit@hibbertco.com. For international literatureordering information, see the second page or back cover of this book.AN873 – Understanding Power Transistor Dynamic Behavior: dv/dt Effects on Switching RBSOAAN875 – Power Transistor Safe Operating Area: Special Consideration for Switching Power SuppliesAN913 – Designing with TMOS Power MOSFETsAN915 – Characterizing Collector–to–Emitter and Drain–to–Source Diodes for Switchmode ApplicationsAN918 – Paralleling Power MOSFETs in Switching ApplicationsAN920 – Theory and Applications of the MC34063 and A78S40 Switching Regulator Control CircuitsAN929 – Insuring Reliable Performance from Power MOSFETsAN952 – Ultrafast Recovery Rectifiers Extend Power Transistor SOAAN1040 – Mounting Considerations for Power SemiconductorsAN1043 – SPICE Model for TMOS Power MOSFETsAN1080 – External–Sync Power Supply with Universal Input Voltage Range for MonitorsAN1083 – Basic Thermal Management of Power SemiconductorsAN1090 – Understanding and Predicting Power MOSFET Switching BehaviorAN1320 – 300 Watt, 100 kHz Converter Utilizes Economical Bipolar Planar Power TransistorsThe following Application Notes are available directly from the ON Semiconductor website(http://onsemi.com).AN1327 – Very Wide Input Voltage Range, Off–line Flyback Switching Power SupplyAN1520 – HDTMOS Power MOSFETs Excel in Synchronous Rectifier ApplicationsAN1541 – Introduction to Insulated Gate Bipolar TransistorAN1542 – Active Inrush Current Limiting Using MOSFETsAN1543 – Electronic Lamp Ballast DesignAN1547 – A DC to DC Converter for Notebook Computers Using HDTMOS and Synchronous RectificationAN1570 – Basic Semiconductor Thermal MeasurementAN1576 – Reduce Compact Fluorescent Cost with Motorola’s (ON Semiconductor) IGBTs for LightingAN1577 – Motorola’s (ON Semiconductor) D2 Series Transistors for Fluorescent ConvertersAN1593 – Low Cost 1.0 A Current Source for Battery ChargersAN1594 – Critical Conduction Mode, Flyback Switching Power Supply Using the MC33364AN1600 – AC–DC Battery Charger – Constant Current with Voltage Limithttp://onsemi.com52

SMPSRMLiterature Available from ON Semiconductor (continued)AN1601 – Efficient Safety Circuit for Electronic BallastAN1628 – Understanding Power Transistors Breakdown ParametersAN1631 – Using PSPICE to Analyze Performance of Power MOSFETs in Step–Down, Switching RegulatorsEmploying Synchronous RectificationAN1669 – MC44603 in a 110 W Output SMPS ApplicationAN1679 – How to Deal with Leakage Elements in Flyback ConvertersAN1680 – Design Considerations for Clamping Networks for Very High Voltage Monolithic Off–Line PWMControllersAN1681 – How to Keep a Flyback Switch Mode Supply stable with a Critical–Mode ControllerBrochures and Data BooksThermal Modeling & Management of Discrete Surface Mount PackagesAnalog/Interface ICs DeviceBipolar Device DataIGBT Device DataThyristor Device DataTMOS Power MOSFET Device DataTVS/Zener Device DataRectifier Device DataMaster Components Selector GuideBR1487/DDL128/DDL111/DDL202/DDL137/DDL135/DDL150/DDL151/DSG388/DDevice ModelsDevice models for SMPS circuits (MC33363 and MC33365), power transistors, rectifiers and other discrete productsare available through ON Semiconductor’s website or by contacting your local sales office.http://onsemi.com53

SMPSRMReference Books Relating to Switching Power Supply DesignBaliga, B. Jayant,Power Semiconductor Devices, PWS Publishing Co., Boston, 1996. 624 pages.Brown, Marty,Practical Switching Power Supply Design, Academic Press, Harcourt Brace Jovanovich, 1990. 240 pages.Brown, MartyPower Supply Cookbook, EDN Series for Design Engineers, ON Semiconductor Series in Solid State Electronics,Butterworth–Heinmann, MA, 1994. 238 pagesChrysiss, G. C.,High Frequency Switching Power Supplies: Theory and Design, Second Edition, McGraw–Hill, 1989. 287 pagesGottlieb, Irving M.,Power Supplies, Switching Regulators, Inverters, and Converters, 2nd Edition, TAB Books, 1994. 479 pages.Kassakian, John G., Martin F. Schlect, and George C. Verghese,Principles of Power Electronics, Addison–Wesley, 1991. 738 pages.Lee, Yim–Shu,Computer–Aided Analysis and Design of Switch–Mode Power Supplies, Marcel Dekker, Inc., NY, 1993Lenk, John D.,Simplified Design of Switching Power Supplies, EDN Series for Design Engineers, Butterworth–Heinmann, MA,1994. 221 pages.McLyman, C. W. T.,Designing Magnetic Components for High Frequency DC–DC Converters, KG Magnetics, San Marino, CA, 1993.433 pages, 146 figures, 32 tablesMitchell, Daniel,Small–Signal MathCAD Design Aids, e/j Bloom Associates, 115 Duran Drive, San Rafael, Ca 94903–2317,415–492–8443, 1992. Computer disk included.Mohan, Ned, Tore M. Undeland, William P. Robbins,Power Electronics: Converter, Applications and Design, 2nd Edition, Wiley, 1995. 802 pagesPaice, Derek A.,Power Electronic Converter Harmonics, Multipulse Methods for Clean Power, IEEE Press, 1995. 224 pages.Whittington, H. W.,Switched Mode Power Supplies: Design and Construction, 2nd Edition, Wiley, 1996 224 pages.http://onsemi.com54

SMPSRMWeb Locations for Switching–Mode Power Supply InformationArdem Associates (Dr. R. David Middlebrook)http://www.ardem.com/Applied Power Electronics Conference (APEC)The power electronics conference for the practical aspects of power supplies.http://www.apec–conf.org/Dr. Vincent G. Bello’s Home PageSPICE simulation for switching–mode power supplies.http://www.SpiceSim.com/e/j BLOOM Associates(Ed Bloom) Educational Materials & Services for Power Electronics.http://www.ejbloom.com/The Darnell Group(Jeff Shepard) Contains an excellent list of power electronics websites, an extensive list of manufacturer’s contactinformation and more.http://www.darnell.com/Switching–Mode Power Supply Design by Jerrold FoutzAn excellent location for switching mode power supply information and links to other sources.http://www.smpstech.com/Institute of Electrical and Electronics Engineers (IEEE)http://www.ieee.org/IEEE Power Electronics Societyhttp://www.pels.org/pels.htmlPower Control and Intelligent Motion (PCIM)Articles from present and past issues.http://www.pcim.com/Power CornerFrank Greenhalgh’s Power Corner in EDTNhttp://fgl.com/power1.htmPower Designershttp://www.powerdesigners.com/Power Quality Assurance MagazineArticles from present and past issues.http://powerquality.com/Power Sources Manufacturers AssociationA trade organization for the power sources industry.http://www.psma.com/Quantum Power LabsAn excellent hypertext–linked glossary of power electronics terms.http://www.quantumpower.com/Ridley Engineering, Inc.Dr. Ray Ridleyhttp://www.ridleyengineering.com/http://onsemi.com55

SMPSRMWeb Locations for Switching–Mode Power Supply Information(continued)Springtime Enterprises – Rudy SevernsRudy Severns has over 40 years of experience in switching–mode power supply design and static power conversionfor design engineers.http://www.rudyseverns.com/TESLAcoDr. Slobodan Cuk is both chairman of TESLAco and head of the Caltech Power Electronics Group.http://www.teslaco.com/Venable Industrieshttp://www.venableind.com/Virginia Power Electronics Center (VPEC)http://www.vpec.vt.eduhttp://onsemi.com56

Analog ICs for SWITCHMODE Power SuppliesSMPSRMA number of different analog circuits that can be used for designing switchmode power supplies are shown on thefollowing pages. These circuits are the same as those in the Power Management and System Management sections ofthe ON Semiconductor Components Selector Guide. Circuits used specifically for the off–line controllers and powerfactor controllers are in the Power Management section. Additional circuits that are frequently used with a SMPS design(dc–dc converters, voltage references, voltage regulators, MOSFET/IGBT drivers and dedicated power managementcontrollers) are included for reference purposes. Undervoltage and overvoltage supervisory circuits are in the SystemManagement section.Information about the discrete semiconductors that are shown in this brochure and other discrete products that maybe required for a switching power supply can be found in the ON Semiconductor Components Selector Guide(SG388/D).http://onsemi.com57

SMPSRMPower Management CircuitsIn Brief . . .In most electronic systems, some form of voltage regulationis required. In the past, the task of voltage regulatordesign was tediously accomplished with discretedevices, and the results were quite often complex andcostly. Today, with bipolar monolithic regulators, thistask has been significantly simplified. The designer nowhas a wide choice of fixed, low dropout and adjustabletype voltage regulators. These devices incorporate manybuilt–in protection features, making them virtuallyimmune to the catastrophic failures encountered in olderdiscrete designs.The switching power supply continues to increase inpopularity and is one of the fastest growing markets in theworld of power conversion. They offer the designer severalimportant advantages over linear series–pass regulators.These advantages include significant advancementsin the areas of size and weight reduction, improvedPageDC–DC Converters with Inductor . . . . . . . . . . . . . . . . 59Inductorless Charge Pump Voltage Converters . . . . 67Off–Line SMPS Controllers . . . . . . . . . . . . . . . . . . . . . 72High Voltage Off–Line Switching Regulators . . . . . . . 82Power Factor Controllers . . . . . . . . . . . . . . . . . . . . . . . 88Voltage References . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93Linear Voltage Regulators . . . . . . . . . . . . . . . . . . . . . . 95LDO Linear Voltage Regulators . . . . . . . . . . . . . . 103Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115Dedicated Power Management Controllers . . . . . . . 121Supervisory ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125efficiency, and the ability to perform voltage step–up,step–down, and voltage–inverting functions.ON Semiconductor offers a diverse portfolio of full featuredswitching regulator control circuits which meet theneeds of today’s modern compact electronic equipment.ANALOG INTEGRATED CIRCUITSSIGNALCONDITIONINGBATTERYMANAGEMENTPOWERMANAGEMENTINTERFACETHERMALMANAGEMENTSPECIALFUNCTIONS/OTHERSAPPLICATIONSPECIFICSTANDARDPRODUCTSOp–AmpsComparatorsLithiumBatteryProtectionICsChargeControllersDC–DCConverterswith InductorInductorlessVoltageConvertersOff–Line SMPSControllersHigh Voltage Off–LineSwitching RegulatorsPower Factor ControllersVoltage ReferencesDataTransmissionDisplayDriversTemperatureSensorsLogicOutputSerialOutputFanControllersTimersLinear Four–QuadrantMultiplierAutomotive/MotorControl/IndustrialWireless &PortableApplicationsComputing&NetworkingSmartCardsLinear VoltageRegulatorsLDO Linear VoltageRegulatorsDriversDedicated PowerManagement ControllersSupervisory ICshttp://onsemi.com58

DC–DC Converters with InductorSMPSRMIn Brief . . .Available in multiple DIP and surface mount packages,DC–DC converters from ON Semiconductor covera very wide range of output current levels from 50 mA upto 5 A and can be used in any topology, step–up, step–down, inverting and step–up and down.These products are ideally suited to provide on–boardconversion in systems where the power is distributed tovarious elements or electronic boards.Recent developments have used synchronous rectificationand CMOS technology for better efficiency andlower current consumption.PageSingle–Ended Controllers with On–ChipPower Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61Easy Switcher Single–Ended Controllerswith On–Chip Power Switch . . . . . . . . . . . . . . . . . . . . 61CMOS Micropower DC–to–DC Converters . . . . . . . . 63ANALOG INTEGRATED CIRCUITSSIGNALCONDITIONINGBATTERYMANAGEMENTPOWERMANAGEMENTINTERFACETHERMALMANAGEMENTSPECIALFUNCTIONS/OTHERSAPPLICATIONSPECIFICSTANDARDPRODUCTSOp–AmpsComparatorsLithiumBatteryProtectionICsChargeControllersDC–DCConverterswith InductorInductorlessVoltageConvertersOff–Line SMPSControllersHigh Voltage Off–LineSwitching RegulatorsPower Factor ControllersVoltage ReferencesDataTransmissionDisplayDriversTemperatureSensorsLogicOutputSerialOutputFanControllersTimersLinear Four–QuadrantMultiplierAutomotive/MotorControl/IndustrialWireless &PortableApplicationsComputing&NetworkingSmartCardsLinear VoltageRegulatorsLDO Linear VoltageRegulatorsDriversDedicated PowerManagement ControllersSupervisory ICshttp://onsemi.com59

SMPSRMDeviceInputVoltageRange(V)OutputVoltage(V)OutputSwitchCurrent(A)ControlScheme Topology PackageµA78S40 2.5 to 40 Adjustable 1.5 PFM Step–Up/Down& InvertingMC34063A 3.0 to 40 Adjustable 1.5 PFM Step–Up/Down& InvertingMC34163 2.5 to 40 Adjustable 3.0 PFM Step–Up/Down& InvertingMC34166 7.5 to 40 Adjustable 3.0 PWM Step–Up/Down& InvertingMC34167 7.5 to 40 Adjustable 5.0 PWM Step–Up/Down& InvertingLM2574 4.75 to 45 3.3, 5,12, 15 &Adjust.Temp.Range(°C)DIP–16 0 to 70,–40 to +85DIP–8/SO–8 0 to 70,–40 to +85DIP–16/SO–16 0 to 70,–40 to +855 Pin TO–220,5 Pin D2PAK5 Pin TO–220,5 Pin D2PAK0.5 PWM Step–Down DIP–8,SO–16WB0 to 70,–40 to +850 to 70,–40 to +85–40 to+125FeaturesInternalSwitchTransistorInternalSwitchTransistorInternalSwitchTransistorInternalSwitchTransistorInternalSwitchTransistorInternalSwitchTransistor,On/OffControlLM2575 4.75 to 45 3.3, 5,12, 15 &Adjust.LM2576 4.75 to 45 3.3, 5,12, 15 &Adjust.1.0 PWM Step–Down 5 Pin TO–220,5 Pin D2PAK3.0 PWM Step–Down 5 Pin TO–220,5 Pin D2PAK–40 to+125–40 to+125InternalSwitchTransistor,On/OffControlInternalSwitchTransistor,On/OffControlMC33463–K 0.9 to Vout 3, 3.3, 5 0.250 VFM Step–Up SOT–89 –30 to +80 InternalSwitchTransistorMC33463–L 0.9 to Vout 3, 3.3, 5 0.050 VFM Step–Up SOT–89 –30 to +80 ExternalSwitchTransistorMC33466–J 0.9 to Vout 3, 3.3, 5 0.250 PWM Step–Up SOT–89 –30 to +80 InternalSwitchTransistorMC33466–L 0.9 to Vout 3, 3.3, 5 0.050 PWM Step–Up SOT–89 –30 to +80 ExternalSwitchTransistorPWM: Pulse Width Modulation PFM: Pulse Frequency Modulation VFM: Variable Frequency Modulationhttp://onsemi.com60

SMPSRMTable 1. Single–Ended Controllers with On–Chip Power SwitchThese monolithic power switching regulators contain all the active functions required to implement standarddc–to–dc converter configurations with a minimum number of external components.IO(mA)Max1500(UncommittedPower Switch)3400(UncommittedPower Switch)MinimumOperatingVoltageRange(V)OperatingModeReference(V)MaximumUsefulOscillatorFrequency(kHz)DeviceTA(°C)Package2.5 to 40 Voltage 1.25 ± 5.2%(1) 100 µA78S40 0 to +70 DIP–16–40 to +851.25 ± 2.0% MC34063A 0 to +70 DIP–8SO–8MC33063A –40 to +85 DIP–8SO–8–40 to +125 SO–82.5 to 40 Voltage 1.25 ± 2.0% 100 MC34163 0 to +70 DIP–16,andSO–16L5.05 ± 3.0% MC33163 –40 to +853400(2) 7.5 to 40 5.05 ± 2.0% 72 ± 12% MC34166 0 to +70 5–Pin(Dedicated EmitterInternallyD2PAK,Power Switch)Fixed MC33166 –40 to +85 5–PinTO–2205500(3)MC34167 0 to +70(Dedicated EmitterPower Switch) MC33167 –40 to +85(1) Tolerance applies over the specified operating temperature range.(2) Guaranteed minimum, typically 4300 mA.(3) Guaranteed minimum, typically 6500 mA.Table 2. Easy Switcher Single–Ended Controllers with On–Chip Power SwitchThe Easy Switcher series is ideally suited for easy, convenient design of a step–down switching regulator (buckconverter), with a minimum number of external components.IO(mA)MaxMinimumOperatingVoltageOscillatorOutputtRange Operating Frequency Voltage(V) Mode (kHz)(V)DeviceTJ(°C)Package500 4.75 to 40Voltage52 Fixed3.3 LM2574N–3.3 –40 to +125 DIP–88.0 to 40Internal 5.0LM2574N–515 to 40 12 LM2574N–1218 to 4080t 8.0 to 40 15123t 1.23 to 37LM2574N–15LM2574N–ADJhttp://onsemi.com61

SMPSRMTable 2. Easy Switcher Single–Ended Controllers with On–Chip Power Switch(continued)The Easy Switcher series is ideally suited for easy, convenient design of a step–down switching regulator (buckconverter), with a minimum number of external components.IO(mA)MaxMinimumOperatingVoltageRange(V)OperatingModeOscillatorFrequency(kHz)OutputVoltage(V)DeviceTJ(°C)Package1000 4.75 to 40Voltage52 Fixed3.3 LM2575T–3.3 –40 to +125 5–Pin8.0 to 40Internal 5.0LM2575T–5TO–22015 to 40 12 LM2575T–1218 to 4080t 8.0 to 40 15123t 1.23 to 37LM2575T–15LM2575T–ADJ4.75 to 403.3 LM2575TV–3.3 5–Pin8.0 to 405.0 LM2575TV–5TO–22015 to 40 12 LM2575TV–1218 to 4080t 8.0 to 40 15123t 1.23 to 37LM2575TV–15LM2575TV–ADJ4.75 to 403.3 LM2575D2T–3.3 5–Pin8.0 to 405.0 LM2575D2T–5D2PAK15 to 40 12 LM2575D2T–1218 to 4080t 8.0 to 40 15123t 1.23 to 37LM2575D2T–15LM2575D2T–ADJ3000 4.75 to 40Voltage52 Fixed3.3 LM2576T–3.3 –40 to +125 5–Pin8.0 to 40Internal 5.0LM2576T–5TO–22015 to 40 12 LM2576T–1218 to 4080t 8.0 to 40 15123t 1.23 to 37LM2576T–15LM2576T–ADJ4.75 to 403.3 LM2576TV–3.3 5–Pin8.0 to 405.0 LM2576TV–5TO–22015 to 40 12 LM2576TV–1218 to 4080t 8.0 to 40 15123t 1.23 to 37LM2576TV–15LM2576TV–ADJ4.75 to 403.3 LM2576D2T–3.3 5–Pin8.0 to 405.0 LM2576D2T–5D2PAK15 to 40 12 LM2576D2T–1218 to 4080t 8.0 to 40 15123t 1.23 to 37LM2576D2T–15LM2576D2T–ADJhttp://onsemi.com62

SMPSRMSwitching Regulator Control Circuits (continued)CMOS Micropower DC–to–DC ConvertersVariable Frequency Micropower DC–to–DC ConverterMC33463HTA = –30° to +80°C, SOT–89The MC33463 series are micropower step–upswitching voltage regulators, specifically designed forhandheld and laptop applications, to provide regulatedoutput voltages using a minimum of external parts. Awide choice of output voltages are available. Thesedevices feature a very low quiescent bias current of4.0 µA typical.The MC33463H–XXKT1 series features a highlyaccurate voltage reference, an oscillator, a variable frequencymodulation (VFM) controller, a driver transistor(Lx), a comparator and feedback resistive divider.The MC33463H–XXLT1 is identical to theMC33463H–XXKT1, except that a drive pin (EXT) foran external transistor is provided.Due to the low bias current specifications, thesedevices are ideally suited for battery powered computer,consumer, and industrial equipment where an extensionof useful battery life is desirable.MC33463 Series Features:• Low Quiescent Bias Current of 4.0 µA• High Output Voltage Accuracy of ±2.5%• Low Startup Voltage of 0.9 V at 1.0 mA• Wide Output Voltage Range of 2.5 V to 7.5 VAvailable• High Efficiency of 80% Typical• Surface Mount PackageDeviceORDERING INFORMATIONOutputVoltageTypeOperatingTemperature RangePackage(Tape/Reel)MC33463H–30KT1 3.0 Int. Switch SOT–89MC33463H–33KT1 3.3 (Tape)MC33463H–50KT1 5.0TA = –30° to +80°CMC33463H–30LT1 3.0 Ext. SwitchSOT–89MC33463H–33LT1 3.3 Drive (Tape)MC33463H–50LT1 5.0Other voltages from 2.5 V to 7.5 V, in 0.1 V increments are available. Consult factory for information.MC33463H–XXKT1DVinLMC33463H–XXLT1VinLCin3LxVLx LimiterDrive2OutputVOCOQCinRb3EXTDriveD2OutputVOCOVFMControllerCbVFMController100 kHzOscillatorVref100 kHzOscillatorVref1GndXX Denotes Output Voltage1Gndhttp://onsemi.com63

SMPSRMCMOS Micropower DC–to–DC Converters (continued)Fixed Frequency PWM Micropower DC–to–DC ConverterMC33466HTA = –30° to +80°C, SOT–89The MC33466 series are micropower switchingvoltage regulators, specifically designed for handheldand laptop applications, to provide regulated outputvoltages using a minimum of external parts. A widechoice of output voltages are available. These devicesfeature a very low quiescent bias current of 15 µA typical.The MC33466H–XXJT1 series features a highlyaccurate voltage reference, an oscillator, a pulse widthmodulation (PWM) controller, a driver transistor (Lx), anerror amplifier and feedback resistive divider.The MC33466H–XXLT1 is identical to theMC33466H–XXJT1, except that a drive pin (EXT) for anexternal transistor is provided.Due to the low bias current specifications, thesedevices are ideally suited for battery powered computer,consumer, and industrial equipment where an extensionof useful battery life is desirable.MC33466 Series Features:• Low Quiescent Bias Current of 15 µA• High Output Voltage Accuracy of ±2.5%• Low Startup Voltage of 0.9 V at 1.0 mA• Soft–Start = 500 µs• Surface Mount PackageDeviceORDERING INFORMATIONOutputVoltageTypeOperatingTemperature RangePackage(Tape/Reel)MC33466H–30JT1 3.0 Int. SOT–89MC33466H–33JT1 3.3 Switch (Tape)MC33466H–50JT1 5.0TA = –30° to +80°CMC33466H–30LT1 3.0 Ext.SOT–89MC33466H–33LT1 3.3 Switch(Tape)MC33466H–50LT1 5.0 Di DriveOther voltages from 2.5 V to 7.5 V, in 0.1 V increments are available. Consult factory for information.MC33466H–XXJT1V inLMC33466H–XXLT1V inC inL3LxV Lx LimiterDrivePWMController50 kHzPhaseCompDSoft–Start2Output(VoltageFeedback)V OC OQC inRbCb3EXTDrivePWMController50 kHzPhaseCompD2Output(VoltageFeedback)V OC OOscillator V ref1Oscillator V ref1Soft–StartGndXX Denotes Output VoltageGndhttp://onsemi.com64

SMPSRMSwitching Regulator Control Circuits (continued)Easy Switcher Single–Ended Controllers with On–Chip Power SwitchStep–Down Voltage RegulatorsLM2574N–XXTJ = –40° to +125°C, DIP–8The LM2574 series of regulators are monolithicintegrated circuits ideally suited for easy and convenientdesign of a step–down switching regulator (buckconverter). All circuits of this series are capable of drivinga 0.5 A load with excellent line and load regulation. Thesedevices are available in fixed output voltages of 3.3 V, 5.0V, 12 V, 15 V, and an adjustable output version.These regulators were designed to minimize thenumber of external components to simplify the powersupply design. Standard series of inductors optimized foruse with the LM2574 are offered by several differentinductor manufacturers.Since the LM2574 converter is a switch–mode powersupply, its efficiency is significantly higher in comparisonwith popular three–terminal linear regulators, especiallywith higher input voltages. In most cases, the power dissipatedby the LM2574 regulator is so low, that the coppertraces on the printed circuit board are normally the onlyheatsink needed and no additional heatsinking is required.The LM2574 features include a guaranteed ±4%tolerance on output voltage within specified inputvoltages and output load conditions, and ±10% on theoscillator frequency (±2% over 0°C to +125°C). Externalshutdown is included, featuring 60 µA (typical) standbycurrent. The output switch includes cycle–by–cyclecurrent limiting, as well as thermal shutdown for fullprotection under fault conditions.Features• 3.3 V, 5.0 V, 12 V, 15 V, and Adjustable OutputVersions• Adjustable Version Output Voltage Range, 1.23 to37 V ±4% max over Line and Load Conditions• Guaranteed 0.5 A Output Current• Wide Input Voltage Range: 4.75 to 40 V• Requires Only 4 External Components• 52 kHz Fixed Frequency Internal Oscillator• TTL Shutdown Capability, Low Power StandbyMode• High Efficiency• Uses Readily Available Standard Inductors• Thermal Shutdown and Current Limit ProtectionApplications• Simple and High–Efficiency Step–Down (Buck)Regulators• Efficient Pre–Regulator for Linear Regulators• On–Card Switching Regulators• Positive to Negative Converters (Buck–Boost)• Negative Step–Up Converters• Power Supply for Battery ChargersXX = Voltage Option, i.e., 3.3, 5, 12, 15 V; and ADJfor Adjustable OutputRepresentative Block Diagram and Typical ApplicationUnregulatedDC InputCin+Vin51FeedbackR2Fixed GainError Amplifier3.1 V InternalRegulatorComparatorON/OFFCurrentLimitON/OFF3OutputVoltage Versions3.3 V5.0 V12 V15 VFor adjustable versionR1 = open, R2 = 0 ΩR2(Ω)1.7 k3.1 k8.84 k11.3 kSig Gnd2R11.0 k1.235 VBand–GapReferenceFreqShift18 kHz52 kHzOscillatorLatchResetDriverThermalShutdown1.0 AmpSwitchOutput7Pwr Gnd4D1L1CoutVoutLoadhttp://onsemi.com65

SMPSRMStep–Down Voltage Regulators (continued)LM2575T–XX, TV, D2T, LM2576T–XX, TV, D2TTJ = –40° to +125°C, TO–220 5 Leads, D2PAK 5 LeadsThe LM2575/6 series of regulators are monolithic integratedcircuits ideally suited for easy and convenientdesign of a step–down switching regulator (buck converter).All circuits of this series are capable of driving a1.0 A (LM2575) or 3.0 A (LM2576) load with excellentline and load regulation. These devices are available infixed output voltages of 3.3 V, 5.0 V, 12 V, 15 V, and anadjustable output version.These regulators were designed to minimize thenumber of external components to simplify the powersupply design. Standard series of inductors optimized foruse with the LM2575/6 are offered by several differentinductor manufacturers.Since the LM2575/6 converter is a switch–mode powersupply, its efficiency is significantly higher in comparisonwith popular three–terminal linear regulators, especiallywith higher input voltages. In many cases, the powerdissipated by the LM2575/6 regulator is so low, that noheatsink is required or its size could be reduceddramatically.The LM2575/6 features include a guaranteed ±4% toleranceon output voltage within specified input voltages andoutput load conditions, and ±10% on the oscillator frequency(±2% over 0°C to 125°C). External shutdown is included,featuring 80 µA typical standby current. The outputswitch includes cycle–by–cycle current limiting, as well asthermal shutdown for full protection under fault conditions.Features• 3.3 V, 5.0 V, 12 V, 15 V, and Adjustable OutputVersions• Adjustable Version Output Voltage Range of 1.23 Vto 37 V ±4% Maximum Over Line and LoadConditions• Guaranteed 1.0 A (LM2575) 3.0 A (LM2576)Output Current• Wide Input Voltage Range: 4.75 V to 40 V• Requires Only 4 External Components• 52 kHz Fixed Frequency Internal Oscillator• TTL Shutdown Capability, Low Power StandbyMode• High Efficiency• Uses Readily Available Standard Inductors• Thermal Shutdown and Current Limit ProtectionApplications• Simple and High–Efficiency Step–Down (Buck)Regulators• Efficient Pre–Regulator for Linear Regulators• On–Card Switching Regulators• Positive to Negative Converters (Buck–Boost)• Negative Step–Up Converters• Power Supply for Battery ChargersXX = Voltage Option, i.e., 3.3, 5, 12, 15 V; and ADJfor Adjustable OutputRepresentative Block Diagram and Typical ApplicationUnregulatedDC InputCin+Vin14FeedbackR2Fixed GainError Amplifier3.1 V InternalRegulatorComparatorON/OFFCurrentLimitON/OFF5OutputVoltage Versions3.3 V5.0 V12 V15 VFor adjustable versionR1 = open, R2 = 0 ΩR2(Ω)1.7 k3.1 k8.84 k11.3 kR11.0 k1.235 VBand–GapReferenceFreqShift18 kHz52 kHzOscillatorLatchResetDriverThermalShutdown1.0 AmpSwitchOutput2Gnd3D1L1CoutRegulatedOutputVoutLoadThis device contains 162 active transistors.http://onsemi.com66

Inductorless Charge PumpVoltage ConvertersSMPSRMIn Brief . . .ON Semiconductor charge pump converters do notrequire inductors, saving associated cost, size, and EMI.Using as few as two inexpensive external capacitors,these devices feature wide input voltage ranges and highoperating efficiencies.PageCharge Pump Converters . . . . . . . . . . . . . . . . . . . . . . . 68Charge Pump DC–to–DC Voltage Converters . . . . . 69Switched Capacitor Voltage Converters . . . . . . . . . . 70100mA Charge Pump Voltage Converterwith Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71ANALOG INTEGRATED CIRCUITSSIGNALCONDITIONINGBATTERYMANAGEMENTPOWERMANAGEMENTINTERFACETHERMALMANAGEMENTSPECIALFUNCTIONS/OTHERSAPPLICATIONSPECIFICSTANDARDPRODUCTSOp–AmpsComparatorsLithiumBatteryProtectionICsChargeControllersDC–DCConverterswith InductorInductorlessVoltageConvertersOff–Line SMPSControllersHigh Voltage Off–LineSwitching RegulatorsPower Factor ControllersVoltage ReferencesDataTransmissionDisplayDriversTemperatureSensorsLogicOutputSerialOutputFanControllersTimersLinear Four–QuadrantMultiplierAutomotive/MotorControl/IndustrialWireless &PortableApplicationsComputing&NetworkingSmartCardsLinear VoltageRegulatorsLDO Linear VoltageRegulatorsDriversDedicated PowerManagement ControllersSupervisory ICshttp://onsemi.com67

SMPSRMCharge Pump ConvertersPart #MC1121MC7660MAX828OutputVoltageVOUT = VIN orVOUT = 2 VINVOUT = VIN orVOUT = 2 VINVOUT = VIN orVOUT = 2 VINInputVoltageRange(V)QuiescentSupplyCurrent*(Max µA @25°C)OutputCurrent(Typ. mA)PackageOptions1.5 to 5.5 500 100 DIP–8, MSOP–8,SO–8Features100 mA Output, MSOPPackage, Low PowerShutdown Mode1.5 to 10 180 20 DIP–8, SO–8 —1.5 to 5.5 90 25 SOT–23A–5 SOT–23–5 Package,12 kHz OscillatorMAX829 VOUT = VIN orVOUT = 2 VIN1.5 to 5.5 260 25 SOT–23A–5 SOT–23–5 Package,35 kHz OscillatorNOTE: *Measured at V DD = 5.0 V at 25°C and no load.http://onsemi.com68

SMPSRMCharge Pump Converters (continued)Charge Pump DC–to–DC Voltage ConverterMC7660TA = –40° to +85°C, SO–8, DIP–8The MC7660 is a pin–compatible replacement for theIndustry standard ICL7660 charge pump voltageconverter. It converts a +1.5V to +10V input to acorresponding –1.5V to –10V output using only twolow–cost capacitors, eliminating inductors and theirassociated cost, size and EMI.The on–board oscillator operates at a nominalfrequency of 10kHz. Operation below 10kHz (for lowersupply current applications) is possible by connecting anexternal capacitor from OSC to ground (with pin 1 open).The MC7660 is available in an 8–pin SOIC and DIPpackage in extended temperature range.Features• Converts +5V Supply to –5V Supply• Wide Input Voltage Range: 1.5V to 10V• Efficient Voltage Conversion: 99.9%• Excellent Power Efficiency: 98%• Low Power Supply: 80µA @ 5VIN• Low Cost and Easy to Use– Only Two External Capacitors Required• Available in Small Outline (SO) Package• ESD Protection: ≥ 2.5kV• No Dx Diode Required for High Voltage OperationApplications• RS–232 Negative Bias• Display Bias• Data Acquisition Negative Supply GenerationDeviceORDERING INFORMATIONOperatingTemperature RangePackageMC7660DR2 TA = –40° to +85°C SO–8, DIP–8Functional Block DiagramV+ CAP+82OSC7RCOSCILLATOR2VOLTAGE–LEVELTRANSLATOR4CAP–LV6INTERNALVOLTAGEREGULATOR5V OUTMC7660LOGICNETWORK3GNDhttp://onsemi.com69

SMPSRMCharge Pump Converters (continued)Switched Capacitor Voltage ConvertersMAX828/MAX829TA = –40° to +85°C, SOT–23–5The MAX828/829 are CMOS “charge–pump”voltage converters in ultra–small SOT–23 5 leadpackages. They invert and/or double an input voltagewhich can range from +1.5V to +5.5V. Conversionefficiency is typically >95%. Switching frequency is12kHz for the MAX828 and 35kHz for the MAX829.External component requirement is only twocapacitors (3.3µF nominal) for standard voltage inverterapplications. With a few additional components apositive doubler can also be built. All other circuitry,including control, oscillator, power MOSFETs areintegrated on–chip. Supply current is 50 µA (MAX828)and 115 µA (MAX829).The MAX828 and MAX829 are available in aSOT–23 5 lead surface mount package.Features• Charge Pump in SOT–23 5 Lead Package• >95% Voltage Conversion Efficiency• Voltage Inversion and/or Doubling• Low 50 µA (MAX828) Quiescent Current• Operates from +1.5V to +5.5V• Up to 25 mA Output Current• Only Two External Capacitors Required• Tested Operating Temperature Range: –40°C to+85°CApplications• LCD Panel Bias• Cellular Phones• Pagers• PDAs, Portable Dataloggers• Battery–Powered DevicesDeviceMAX828SNTRMAX829SNTRORDERING INFORMATIONOperatingTemperature RangeTA = –40° to +85°CPackageSOT–23–5http://onsemi.com70

SMPSRMCharge Pump Converters (continued)100mA Charge Pump Voltage Converter with ShutdownMC1121TA = –40° to +85°C, Micro8The MC1121 is a charge pump converter with 100mAoutput current capability. It converts a 2.4V to 5.5V inputto a corresponding negative output voltage. As with allcharge pump converters, the MC1121 uses no inductorssaving cost, size, and reducing EMI.An on–board oscillator operates at a typical frequencyof 10kHz (at VDD = 5V) when the frequency control input(FC) is connected to ground. The oscillator frequencyincreases to 200kHz when FC is connected to VDD,allowing the use of smaller capacitors. Operation atsub–10kHz frequencies results in lower quiescent currentand is accomplished with the addition of an externalcapacitor from OSC (pin 7) to ground. The MC1121 canbe driven from an external clock connected OSC. Typicalsupply current at 10kHz is 50µA, and falls to less than 1µAwhen the shutdown input is brought low, whether theinternal or an external clock is used. The MC1121 isavailable in a Micro–8 package.Features• Converts a 2.4V to 5.5V Input Voltage to aCorresponding Negative Output Voltage(Inverter Mode)• Uses Only 2 Capacitors; No Inductors Required!• High Output Current: 100mA• Selectable Oscillator Frequency: 10kHz to 200kHz• Power–Saving Shutdown Input• Optional High–Frequency Operation Allows Use ofSmall Capacitors• Low Operating Current (FC = GND): 50µA• Tested Operating Temperature Range: –40°C to+85°CApplications• Laptop Computers• Medical Instruments• Disk Drives• µP–Based Controllers• Process InstrumentationDeviceORDERING INFORMATIONOperatingTemperature RangePackageMC1121DMR2 TA = –40° to +85°C Micro8Functional Block DiagramCAP++C1–CAP–SHDNFCOSCOSCCONTROLRCOSCILLATORSWITCHMATRIXVout+ C2VDDGNDMC1121LOGICCIRCUITShttp://onsemi.com71

SMPSRMOff–line SMPS ControllersIn Brief . . .These high performance controllers are optimized foroff–line, ac–to–dc power supplies and dc–to–dcconverters in the flyback topology. They also haveundervoltage lockout voltages which are optimized foroff–line and lower voltage dc–to–dc converters,respectively. Applications include desktop computers,peripherals, televisions, games, and various consumerappliances.PageOff–line SMPS Controllers . . . . . . . . . . . . . . . . . . . . . . 73Special Switching Regulator Controllers . . . . . . . . . . 76ANALOG INTEGRATED CIRCUITSSIGNALCONDITIONINGBATTERYMANAGEMENTPOWERMANAGEMENTINTERFACETHERMALMANAGEMENTSPECIALFUNCTIONS/OTHERSAPPLICATIONSPECIFICSTANDARDPRODUCTSOp–AmpsComparatorsLithiumBatteryProtectionICsChargeControllersDC–DCConverterswith InductorInductorlessVoltageConvertersOff–Line SMPSControllersHigh Voltage Off–LineSwitching RegulatorsPower Factor ControllersVoltage ReferencesDataTransmissionDisplayDriversTemperatureSensorsLogicOutputSerialOutputFanControllersTimersLinear Four–QuadrantMultiplierAutomotive/MotorControl/IndustrialWireless &PortableApplicationsComputing&NetworkingSmartCardsLinear VoltageRegulatorsLDO Linear VoltageRegulatorsDriversDedicated PowerManagement ControllersSupervisory ICshttp://onsemi.com72

Off–line SMPS ControllersThese devices contain the primary building blockswhich are required to implement a variety of switchingpower supplies. The product offerings fall into threemajor categories consisting of single–ended anddouble–ended controllers, plus single–ended ICs withon–chip power switch transistors. These circuits operateSMPSRMin voltage, current or resonant modes and are designed todrive many of the standard switching topologies. Thesingle–ended configurations include buck, boost,flyback and forward converters. The double–endeddevices control push–pull, half bridge and full bridgeconfigurations.Table 1. Single–Ended ControllersThese single–ended voltage and current mode controllers are designed for use in buck, boost, flyback, and forwardconverters. They are cost effective in applications that range from 0.1 to 200 W power output.IO(mA)MaxMinimumOperatingVoltageRange(V)OperatingModeReference(V)MaximumUsefulOscillatorFrequency(kHz)DeviceTA(°C)Package500 7.0 to 40 Voltage 5.0 ± 1.5% 200 MC34060A 0 to +70 SO–14(UncommittedDIP–14Drive Output)MC33060A –40 to +85 SO–141000 Current(Totem PoleMOSFETDrive Output) ut)DIP–1411.5 to 30 5.0 ± 2.0% 500 UC3842A 0 to +70 SO–14DIP–811 to 30 5.0 ± 1.0% UC2842A –25 to +85 SO–14DIP–88.2 to 30 5.0 ± 2.0% UC3843A 0 to +70 SO–14DIP–85.0 ± 1.0% UC2843A –25 to +85 SO–14DIP–811.5 to 30 5.0 ± 2.0% 500 UC3844 0 to +70 SO–14(50% DutyDIP–8Cycle Limit)11 to 30 5.0 ± 1.0%UC2844 –25 to +85 SO–14DIP–88.2 to 30 5.0 ± 2.0% UC3845 0 to +70 SO–14DIP–85.0 ± 1.0% UC2845 –25 to +85 SO–14DIP–811.5 to 30 5.0 ± 2.0% 500 UC3842B 0 to +70 SO–14(ImprovedOscillatorSO–8SpecificationsDIP–8withFrequencyUC3842BV –40 to +105 SO–14GuaranteedSO–8at 250 kHz)DIP–8http://onsemi.com73

SMPSRMTable 1. Single–Ended Controllers (continued)These single–ended voltage and current mode controllers are designed for use in buck, boost, flyback, and forwardconverters. They are cost effective in applications that range from 0.1 to 200 W power output.MinimumOperatingMaximumUsefulIOVoltageOscillator(mA)RangeOperatingReferenceFrequencyTAMax(V)Mode(V)(kHz)Device(°C)Package1000 11 to 30 Current 5.0 ± 1.0% 500 UC2842B –25 to +85 SO–14(Totem Pole(ImprovedSO–8MOSFETOscillatorDrive Output) ut)SpecificationsDIP–88.2 to 30 5.0 ± 2.0% with UC3843B 0 to +70 SO–14FrequencySO–8Guaranteedat 250 kHz)DIP–8UC3843BV –40 to +105 SO–142000(Totem PoleMOSFETDrive Output)SO–8DIP–85.0 ± 1.0% UC2843B –25 to +85 SO–14SO–8DIP–811.5 to 30 5.0 ± 2.0% 500 UC3844B 0 to +70 SO–14(50% DutySO–8Cycle Limit)DIP–8UC3844BV –40 to +105 SO–14SO–8DIP–811 to 30 5.0 ± 1.0% UC2844B –25 to +85 SO–14SO–8DIP–88.2 to 30 5.0 ± 2.0% UC3845B 0 to +70 SO–14SO–8DIP–8UC3845BV –40 to +105 SO–14SO–8DIP–85.0 ± 1.0% UC2845B –25 to +85 SO–14SO–8DIP–89.2 to 30 Current 5.1 ± 1.0% 1000 MC34023P 0 to +70 DIP–16orVoltageMC33023DW –40 to +105 SO–16Lhttp://onsemi.com74

SMPSRMTable 2. Double–Ended ControllersThese double–ended voltage, current and resonant mode controllers are designed for use in push–pull, half–bridge,and full–bridge converters. They are cost effective in applications that range from 100 to 2000 watts power output.IO(mA)Max500(UncommittedDrive Outputs)uts)± 500(Totem PoleMOSFETDrive Outputs)± 200(Totem PoleMOSFETDrive Outputs)±1500(Totem PoleMOSFETDrive Outputs)MinimumOperatingVoltageRange(V)OperatingModeReference(V)MaximumUsefulOscillatorFrequency(kHz)DeviceTA(°C)Package7.0 to 40 Voltage 5.0 ± 5.0%(1) 200 TL494 0 to +70 DIP–16–25 to +85 DIP–165.0 ± 1.5% 300 TL594 0 to +70 DIP–16–25 to +85 DIP–168.0 to 40 5.1 ± 2.0% 400 SG3525A 0 to +70 DIP–169.6 to 20 Resonant(ZeroCurrent)5.0 ± 2.0% SG3526 0 to +125(2) DIP–185.1 ± 2.0% 1000 MC34066 0 to +70 DIP–16MC33066 –40 to +85 SO–16LDIP–162000(Totem PoleMOSFETDrive Outputs)Resonant2000 MC34067 0 to +70 SO–16L(ZeroVoltage)DIP–16MC33067 –40 to +85 SO–16LDIP–169.2 to 30 Current 5.1 ± 1.0% 1000 MC34025 0 to +70 SO–16LorVoltageDIP–16MC33025 –40 to +105 SO–16L(1) Tolerance applies over the specified operating temperature range.(2) Junction Temperature Range.http://onsemi.com75

SMPSRMSpecial Switching Regulator ControllersThese high performance dual channel controllers areoptimized for off–line, ac–to–dc power supplies anddc–to–dc converters in the flyback topology. They alsohave undervoltage lockout voltages which are optimizedTable 3. Dual Channel ControllersIO(mA)MaxMinimumOperatingVoltageRange(V)OperatingModeReference(V)for off–line and lower voltage dc–to–dc converters,respectively. Applications include desktop computers,peripherals, televisions, games, and various consumerappliances.MaximumUsefulOscillatorFrequency(kHz)DeviceTA(°C)Package±1000 11 to 20 Current 5.0 ± 2.6% 500 MC33065 –40 to +85 SO–16L(Totem PoleMOSFETDIP–16Drive 8.4 to 20 MC33065 –40 to +85 SO–16LOutputs)DIP–16http://onsemi.com76

SMPSRMSwitching Regulator Control Circuits (continued)Single–Ended GreenLine ControllersEnhanced Mixed Frequency Mode GreenLine PWM Controller:Fixed Frequency, Variable Frequency, Standby ModeMC44603AP, DWTA = –25° to +85°C, DIP–16, SO–16LThe MC44603A is an enhanced high performancecontroller that is specifically designed for off–line anddc–to–dc converter applications. This device has theunique ability of automatically changing operatingmodes if the converter output is overloaded, unloaded, orshorted, offering the designer additional protection forincreased system reliability. The MC44603A has severaldistinguishing features when compared to conventionalSMPS controllers. These features consist of a foldbackfacility for overload protection, a standby mode when theconverter output is slightly loaded, a demagnetizationdetection for reduced switching stresses on transistor anddiodes, and a high current totem pole output ideallysuited for driving a power MOSFET. It can also be usedfor driving a bipolar transistor in low power converters(< 150 W). It is optimized to operate in discontinuousmode but can also operate in continuous mode. Itsadvanced design allows use in current mode or voltagemode control applications.Current or Voltage Mode Controller• Operation up to 250 kHz Output Switching Frequency• Inherent Feed Forward Compensation• Latching PWM for Cycle–by–Cycle Current Limiting• Oscillator with Precise Frequency ControlHigh Flexibility• Externally Programmable Reference Current• Secondary or Primary Sensing• Synchronization Facility• High Current Totem Pole Output• Undervoltage Lockout with HysteresisSafety/Protection Features• Overvoltage Protection Against Open Current andOpen Voltage Loop• Protection Against Short Circuit on Oscillator Pin• Fully Programmable Foldback• Soft–Start Feature• Accurate Maximum Duty Cycle Setting• Demagnetization (Zero Current Detection)Protection• Internally Trimmed Reference• Enhanced Output DriveGreenLine Controller: Low Power Consumption inStandby Mode• Low Startup and Operating Current• Fully Programmable Standby Mode• Controlled Frequency Reduction in Standby Mode• Low dV/dT for Low EMI RadiationsHigh Safety Standby Ladder Mode GreenLine PWM ControllerMC44604PTA = –25° to +85°C, DIP–16The MC44604 is an enhanced high performancecontroller that is specifically designed for off–line anddc–to–dc converter applications.The MC44604 is a modification of the MC44603. TheMC44604 offers enhanced safety and reliable powermanagement in its protection features (foldback, overvoltagedetection, soft–start, accurate demagnetizationdetection). Its high current totem pole output is alsoideally suited for driving a power MOSFET but can alsobe used for driving a bipolar transistor in low power converters(< 150 W).In addition, the MC44604 offers a new efficient wayto reduce the standby operating power by means of apatented standby ladder mode operation of the convertersignificantly reducing the converter consumption instandby mode.Current or Voltage Mode Controller• Operation Up to 250 kHz Output Switching Frequency• Inherent Feed Forward Compensation• Latching PWM for Cycle–by–Cycle Current Limiting• Oscillator with Precise Frequency ControlHigh Flexibility• Externally Programmable Reference Current• Secondary or Primary Sensing• High Current Totem Pole Output• Undervoltage Lockout with Hysteresishttp://onsemi.com77

SMPSRMSingle–Ended GreenLine Controllers (continued)High Safety Standby Ladder Mode GreenLine PWM Controller (continued)Safety/Protection Features• Overvoltage Protection Facility Against Open Loop• Protection Against Short Circuit on Oscillator Pin• Fully Programmable Foldback• Soft–Start Feature• Accurate Maximum Duty Cycle Setting• Demagnetization (Zero Current Detection) Protection• Internally Trimmed ReferenceGreenLine Controller:• Low Startup and Operating Current• Patented Standby Ladder Mode for Low StandbyLosses• Low dV/dT for Low EMIHigh Safety Latched Mode GreenLine PWM Controllerfor (Multi)Synchronized ApplicationsMC44605PTA = –25° to +85°C, DIP–16The MC44605 is a high performance current modecontroller that is specifically designed for off–lineconverters. The MC44605 has several distinguishingfeatures that make it particularly suitable formultisynchronized monitor applications.The MC44605 synchronization arrangementenables operation from 16 kHz up to 130 kHz. Thisproduct was optimized to operate with universal acmains voltage from 80 V to 280 V, and its high currenttotem pole output makes it ideally suited for driving apower MOSFET.The MC44605 protections provide well controlled,safe power management. Safety enhancements detectfour different fault conditions and provide protectionthrough a disabling latch.Current or Voltage Mode Controller• Current Mode Operation Up to 250 kHz OutputSwitching Frequency• Inherent Feed Forward Compensation• Latching PWM for Cycle–by–Cycle CurrentLimiting• Oscillator with Precise Frequency Control• Externally Programmable Reference Current• Secondary or Primary Sensing (Availability of ErrorAmplifier Output)• Synchronization Facility• High Current Totem Pole Output• Undervoltage Lockout with Hysteresis• Low Output dV/dT for Low EMI• Low Startup and Operating CurrentSafety/Protection Features• Soft–Start Feature• Demagnetization (Zero Current Detection)Protection• Overvoltage Protection Facility Against Open Loop• EHT Overvoltage Protection (E.H.T.OVP):Protection Against Excessive AmplitudeSynchronization Pulses• Winding Short Circuit Detection (W.S.C.D.)• Limitation of the Maximum Input Power (M.P.L.):Calculation of Input Power for Overload Protection• Over Heating Detection (O.H.D.): to Prevent thePower Switch from Excessive HeatingLatched Disabling Mode• When one of the following faults is detected: EHTovervoltage, Winding Short Circuit (WSCD),excessive input power (M.P.L.), power switch overheating (O.H.D.), a counter is activated• If the counter is activated for a time that is longenough, the circuit gets definitively disabled. Thelatch can only be reset by removing and thenre–applying powerhttp://onsemi.com78

SMPSRMFew External ComponentsReliable and FlexibleGreenLine Very High VoltagePWM ControllerMC44608TA = –25° to +85°C, DIP–8The MC44608 is a high performance voltage modecontroller designed for off–line converters. This highvoltage circuit that integrates the start–up current sourceand the oscillator capacitor, requires few external componentswhile offering a high flexibility and reliability.The device also features a very high efficiencystand–by management consisting of an effective PulsedMode operation. This technique enables the reduction ofthe stand–by power consumption to approximately 1Wwhile delivering 300mW in a 150W SMPS.• Integrated Start–Up Current Source• Lossless Off–Line Start–Up• Direct Off–Line Operation• Fast Start–UpGeneral Features• Flexibility• Duty Cycle Control• Undervoltage Lockout with Hysteresis• On Chip Oscillator Switching Frequency 40, 75, or100kHz• Secondary control with Few External ComponentsProtections• Maximum Duty Cycle Limitation• Cycle by Cycle Current Limitation• Demagnetization (Zero Current Detection)Protection• “Over VCC Protection” Against Open Loop• Programmable Low Inertia Over Voltage Protectionagainst open loop• Internal Thermal ProtectionGreenLine Controller• Pulsed Mode Techniques for a Very High EfficiencyLow Power Mode• Lossless Startup• Low dV/dT for Low EMI RadiationsDeviceMC44608P40MC44608P75MC44608P100ORDERING INFORMATIONOperatingTemperature RangeTJ = –25° to +85°CPackagePlasticDIP–8SwitchingFrequency40 kHz75 kHz100 kHzhttp://onsemi.com79

SMPSRMRepresentative Block DiagramDemagViDMG+–50 mV/20 mV>24 A1 8>120 AUVLO210 mAStart–upSource2IsenseDemagLogicOutputStart–upPhase200 ASwitchingPhase1 0S1&Stand–byLeading EdgeBlankingLatchedPhaseStart–upPhaseStand–byManagementOCOutputNOC+CS–OSCEnableOSC&2 SClock+PWM–VPWM1 V 10 kHz Filter&&&Latched off PhaseStart–up PhaseSwitching PhaseOVPUVLO1UVLO2OUT DisableDMGThermalS ShutdownPWMLatchR QVCCManagementBufferLatched off PhaseStand–by&S2 S3RegulationBlockSwitching Phase6VCC5Driver4GND3ControlInputhttp://onsemi.com80

SMPSRMCritical Conduction SMPS ControllerMC33364D, D1, D2TJ = –25° to +125°C, SO–8, SO–16The MC33364 series are variable frequency SMPScontrollers that operate in the critical conduction mode.They are optimized for low power, high density powersupplies requiring minimum board area, reducedcomponent count, and low power dissipation. Eachnarrow body SOIC package provides a small footprint.Integration of the high voltage startup savesapproximately 0.7 W of power compared to resistorbootstrapped circuits.Each MC33364 features an on–board reference,UVLO function, a watchdog timer to initiate outputswitching, a zero current detector to ensure criticalconduction operation, a current sensing comparator,leading edge blanking, and a CMOS driver. Protectionfeatures include the ability to shut down switching, andcycle–by–cycle current limiting.The MC33364D1 is available in a surface mountSO–8 package. It has an internal 126 kHz frequencyclamp. For loads which have a low power operatingcondition, the frequency clamp limits the maximumoperating frequency, preventing excessive switchinglosses and EMI radiation.The MC33364D2 is available in the SO–8 packagewithout an internal frequency clamp.The MC33364D is available in the SO–16 package.It has an internal 126 kHz frequency clamp which ispinned out, so that the designer can adjust the clampfrequency by connecting appropriate values ofresistance and capacitance.• Lossless Off–Line Startup• Leading Edge Blanking for Noise Immunity• Watchdog Timer to Initiate Switching• Minimum Number of Support Components• Shutdown Capability• Over Temperature Protection• Optional Frequency ClampFBCurrentSenseZC DetLeadingEdgeBlankingZeroCurrentDetectorPWMComparatorSRRQWatchdogTimerThermalShutdownRestartDelayV refUVLOFrequencyClampV CCUVLOBandgapReferenceLineV CCV refGndGateOptionalFrequencyClamphttp://onsemi.com81

SMPSRMHigh Voltage Off–LineSwitching RegulatorsIn Brief . . .These high performance switching controllers areoptimized for low power off–line converters usingflyback topology. These switching regulators haveon–board switch transistors. Applications includeAC/DC adapters, battery chargers and various consumerappliances.PageVery High Voltage Switching Regulator . . . . . . . . . . . 84Very High Voltage Switching Regulator . . . . . . . . . . . 86ANALOG INTEGRATED CIRCUITSSIGNALCONDITIONINGBATTERYMANAGEMENTPOWERMANAGEMENTINTERFACETHERMALMANAGEMENTSPECIALFUNCTIONS/OTHERSAPPLICATIONSPECIFICSTANDARDPRODUCTSOp–AmpsComparatorsLithiumBatteryProtectionICsChargeControllersDC–DCConverterswith InductorInductorlessVoltageConvertersOff–Line SMPSControllersHigh Voltage Off–LineSwitching RegulatorsPower Factor ControllersVoltage ReferencesDataTransmissionDisplayDriversTemperatureSensorsLogicOutputSerialOutputFanControllersTimersLinear Four–QuadrantMultiplierAutomotive/MotorControl/IndustrialWireless &PortableApplicationsComputing&NetworkingSmartCardsLinear VoltageRegulatorsLDO Linear VoltageRegulatorsDriversDedicated PowerManagement ControllersSupervisory ICshttp://onsemi.com82

SMPSRMTable 1. Very High Voltage Single–Ended Controller with On–Chip Power SwitchThis monolithic high voltage switching regulator is specifically designed to operate from a rectified ac line voltagesource. Included are an on–chip high voltage power switch, active off–line startup circuitry and a full featured PWMcontroller with fault protection.DeviceRectified 85 to276 VAC LinePower SwitchMOSFET IntegratedMax DrainVoltagePeakCurrentR DS(on)(typ. @ T J= 25 °C)Max Output Power@ Vin = 92V to265 VACStart–UpControlSchemeOscillatorFrequencyPackageTemperatureRangeAdditionalFeaturesMC33362ONLY110 VOpera–tionYes 500 V 2A 4.4 Ω 20W ActiveOn–Chip250 VFET PWM,FixedFrequency VoltageModeAdjustableup to300 kHzDIP–16SO–16WB25 to+125°CMC33363A Yes Yes 700 V 1A 7.5 Ω 14W ActiveOn–Chip500 VFET PWM,FixedFrequency VoltageModeAdjustableup to300 kHzDIP–16SO–16WB25 to+125°CMC33363B Yes Yes 700 V 1A 15 Ω 8W ActiveOn–Chip450 VFET PWM,FixedFrequency VoltageModeAdjustableup to300 kHzDIP–16SO–16WB25 to+125°CMC33365 Yes Yes 700 V 1A 15 Ω 8W ActiveOn–Chip450 VFET PWM,FixedFrequency VoltageModeAdjustableup to300 kHzDIP–1625 to+125°CBulk CapacitorVoltageSensingCapability toSense anAC LineBrown–Outhttp://onsemi.com83

SMPSRMVery High Voltage Switching RegulatorMC33362DW, PTJ = –25° to +125°C, DIP–16, SOP–16LThe MC33362 is a monolithic high voltage switchingregulator that is specifically designed to operate from arectified 120 VAC line source. This integrated circuitfeatures an on–chip 500 V/2.0 A SENSEFET powerswitch, 250 V active off–line startup FET, duty cyclecontrolled oscillator, current limiting comparator with aprogrammable threshold and leading edge blanking,latching pulse width modulator for double pulsesuppression, high gain error amplifier, and a trimmedinternal bandgap reference. Protective features includecycle–by–cycle current limiting, input undervoltagelockout with hysteresis, output overvoltage protection,and thermal shutdown. This device is available in a16–lead dual–in–line and wide body surface mountpackages.• On–Chip 500 V, 2.0 A SENSEFET Power Switch• Rectified 120 VAC Line Source Operation• On–Chip 250 V Active Off–Line Startup FET• Latching PWM for Double Pulse Suppression• Cycle–By–Cycle Current Limiting• Input Undervoltage Lockout with Hysteresis• Output Overvoltage Protection Comparator• Trimmed Internal Bandgap Reference• Internal Thermal Shutdown20 W Off–Line ConverterAC InputStartup Input1RegulatorOutput86MirrorRegStartupUVLOV CC3OvervoltageProtection InputDC OutputR TOVP11C T7OscPWM LatchSQDriver16Power SwitchDrainPWMRI pkLEBThermalCompensation9Gnd 4, 5, 12, 13EA10Voltage FeedbackInputhttp://onsemi.com84

SMPSRMSwitching Regulator Control Circuits (continued)Very High Voltage Switching RegulatorMC33363ADW, APTJ = –25° to +125°C, DIP–16, SOP–16LThe MC33363A is a monolithic high voltage switchingregulator that is specifically designed to operate from a rectified240 Vac line source. This integrated circuit features anon–chip 700 V/1.5 A SENSEFET power switch, 550 Vactive off–line startup FET, duty cycle controlled oscillator,current limiting comparator with a programmable thresholdand leading edge blanking, latching pulse width modulatorfor double pulse suppression, high gain error amplifier, anda trimmed internal bandgap reference. Protective featuresinclude cycle–by–cycle current limiting, input undervoltagelockout with hysteresis, output overvoltage protection,and thermal shutdown. This device is available in a 16–leaddual–in–line and wide body surface mount packages.• On–Chip 700 V, 1.5 A SENSEFET Power Switch• Rectified 240 Vac Line Source Operation• On–Chip 500 V Active Off–Line Startup FET• Latching PWM for Double Pulse Suppression• Cycle–By–Cycle Current Limiting• Input Undervoltage Lockout with Hysteresis• Output Overvoltage Protection Comparator• Trimmed Internal Bandgap Reference• Internal Thermal ShutdownAC InputStartup Input1RegulatorOutput8MirrorRegStartupUVLOVCC3DC Output6OvervoltageProtection InputRTOVP11CT7OscPWM LatchSQDriver16Power SwitchDrainPWMRIpkLEBThermalCompensation9EA10Gnd 4, 5, 12, 13VoltageFeedbackInputhttp://onsemi.com85

SMPSRMSwitching Regulator Control Circuits (continued)High Voltage Switching RegulatorMC33363BTJ = –25° to +125°CThe MC33363B is a monolithic high voltage switchingregulator that is specifically designed to operate froma rectified 240 Vac line source. This integrated circuitfeatures an on–chip 700 V/1.0 A SENSEFET powerswitch, 450 V active off–line startup FET, duty cycle controlledoscillator, current limiting comparator with a programmablethreshold and leading edge blanking, latchingpulse width modulator for double pulse suppression,high gain error amplifier, and a trimmed internal bandgapreference. Protective features include cycle–by–cyclecurrent limiting, input undervoltage lockout with hysteresis,overvoltage protection, and thermal shutdown. Thisdevice is available in a 16–lead dual–in–line and widebody surface mount packages.• On–Chip 700 V, 1.0 A SENSEFET Power Switch• Rectified 240 Vac Line Source Operation• On–Chip 450 V Active Off–Line Startup FET• Latching PWM for Double Pulse Suppression• Cycle–By–Cycle Current Limiting• Input Undervoltage Lockout with Hysteresis• Output Overvoltage Protection• Trimmed Internal Bandgap Reference• Internal Thermal ShutdownDeviceMC33363BDWMC33363BPORDERING INFORMATIONOperatingTemperature RangeTJ = –25° to +125°CPackageSOP–16LDIP–16Simplified ApplicationAC InputStartup Input1RegulatorOutputR TC T867MirrorOscPWMRegStartupPWM LatchS DriverQRLEBI pkUVLOOVPV CC3OvervoltageProtectionInput1116Power SwitchDrainDC OutputThermalCompensation9Gnd 4, 5, 12, 13EA10VoltageFeedbackInputhttp://onsemi.com86

SMPSRMSwitching Regulator Control Circuits (continued)High Voltage Switching RegulatorMC33365TJ = –25° to +125°C, DIP–16The MC33365 is a monolithic high voltage switchingregulator that is specifically designed to operate from arectified 240 Vac line source. This integrated circuit featuresan on–chip 700 V/1.0 A SENSEFET power switch,450 V active off–line startup FET, duty cycle controlledoscillator, current limiting comparator with a programmablethreshold and leading edge blanking, latchingpulse width modulator for double pulse suppression, highgain error amplifier, and a trimmed internal bandgap reference.Protective features include cycle–by–cycle currentlimiting, input undervoltage lockout with hysteresis,bulk capacitor voltage sensing, and thermal shutdown.This device is available in a 16–lead dual–in–line package.• On–Chip 700 V, 1.0 A SENSEFET Power Switch• Rectified 240 Vac Line Source Operation• On–Chip 450 V Active Off–Line Startup FET• Latching PWM for Double Pulse Suppression• Cycle–By–Cycle Current Limiting• Input Undervoltage Lockout with Hysteresis• Bulk Capacitor Voltage Comparator• Trimmed Internal Bandgap Reference• Internal Thermal ShutdownDeviceORDERING INFORMATIONOperatingTemperature RangePackageMC33365P TJ = –25° to +125°C DIP–16Simplified ApplicationAC InputStartup Input1RegulatorOutput8MirrorRegStartupUVLO3V CCDC Output6BOKR TC T7OscPWMPWM LatchSQRI pkDriverLEBBOK1116Power SwitchDrainThermalCompensation9Gnd 4, 5, 12, 13EA10VoltageFeedbackInputhttp://onsemi.com87

SMPSRMPower Factor ControllersIn Brief . . .The new PFC’s are developed to control Power FactorCorrection pre–converters meeting IEC1000–3–2 standardrequirements in electronic ballast and off–linepower conversion applications. These devices aredesigned to work in free frequency critical conductionmode. They can be synchronized and feature very effectiveprotection to ensure a safe and reliable operation.They also optimized to offer extremely compact andcost–effective PFC solutions. Ultimately, the solutionsystem cost is significantly lowered. The portfolio offersproducts that can propose a free output voltage levelmode (follower boost technique) that enables a drasticsize reduction of both the inductor and the powerMOSFET. Also, they are able to function in a traditionalway (constant output voltage regulation level), and anyintermediary solutions can be easily implemented. Thisflexibility makes them ideal to optimally cope with awide range of applications.PagePower Factor Controllers . . . . . . . . . . . . . . . . . . . . . . . 89GreenLine Power Factor Controller . . . . . . . . . . . . . 92ANALOG INTEGRATED CIRCUITSSIGNALCONDITIONINGBATTERYMANAGEMENTPOWERMANAGEMENTINTERFACETHERMALMANAGEMENTSPECIALFUNCTIONS/OTHERSAPPLICATIONSPECIFICSTANDARDPRODUCTSOp–AmpsComparatorsLithiumBatteryProtectionICsChargeControllersDC–DCConverterswith InductorInductorlessVoltageConvertersOff–Line SMPSControllersHigh Voltage Off–LineSwitching RegulatorsPower Factor ControllersVoltage ReferencesDataTransmissionDisplayDriversTemperatureSensorsLogicOutputSerialOutputFanControllersTimersLinear Four–QuadrantMultiplierAutomotive/MotorControl/IndustrialWireless &PortableApplicationsComputing&NetworkingSmartCardsLinear VoltageRegulatorsLDO Linear VoltageRegulatorsDriversDedicated PowerManagement ControllersSupervisory ICshttp://onsemi.com88

Table 1. Power Factor ControllersIO(mA)Max± 500(Totem PoleMOSFETDrive Outputs)1500(CMOS TotemPole MOSFETDriveOutputs)MinimumOperatingVoltageRange(V)MaximumStartupVoltage(V)Reference(V) Features Device9.0 to 30 30 2.5 ± 1.4% Undervoltage Lockout,Internal lStartuptTimer9.0 to 16 500 5.0 ± 1.5% Off–Line High VoltageStartup OvervoltageComparatorarator,Undervoltage Lockout,Timer, Low Load DetectTA(°C)SMPSRMPackageMC34261 0 to +70 DIP–8MC33261 –40 to +85 SO–8DIP–8Overvoltage MC34262 0 to +85 SO–8Comparator,Undervoltage Lockout,DIP–8Internal Startup MC33262 –40 to +105 SO–8TimerDIP–8MC33368 –25 to +125 SO–16DIP–16http://onsemi.com89

SMPSRMPower Factor ControllersMC34262D, PTA = 0° to +85°C, DIP–8, SO–8MC33262D, PTA = –40° to +105°C, DIP–8, SO–8The MC34262, MC33262 series are active powerfactor controllers specifically designed for use as apreconverter in electronic ballast and in off–line powerconverter applications. These integrated circuits featurean internal startup timer for stand alone applications, aone quadrant multiplier for near unity power factor, zerocurrent detector to ensure critical conduction operation,transconductance error amplifier, quickstart circuit forenhanced startup, trimmed internal bandgap reference,current sensing comparator, and a totem pole outputideally suited for driving a power MOSFET.Also included are protective features consisting of anovervoltage comparator to eliminate runaway outputvoltage due to load removal, input undervoltage lockoutwith hysteresis, cycle–by–cycle current limiting,multiplier output clamp that limits maximum peakswitch current, an RS latch for single pulse metering, anda drive output high state clamp for MOSFET gateprotection. These devices are available in dual–in–lineand surface mount plastic packages.85 to 265VacRFIFilter1MC34262Zero CurrentDetector1.2 V1.6 V36 V6.7 V100 k1N493410022 kT2.5 VReferenceUVLO14 VMUR460VO400 V/0.44 ADelayTimer RRSLatch16 VDriveOutput1010MTP14N50E3301.3 MCurrent SenseComparator1.5 VOvervoltageComparator20 k10 pF0.11.6 M0.0112 kMultiplier1.08 VrefError Amp10 µAVrefQuickstart10 k0.68http://onsemi.com90

SMPSRMPower Factor Controllers (continued)MC33368D, PTJ = –25° to +125°C, DIP–16, SO–16The MC33368 is an active power factor controller thatfunctions as a boost preconverter in off–line power supplyapplications. MC33368 is optimized for low power, highdensity power supplies requiring minimum board area,reduced component count, and low power dissipation. Thenarrow body SOIC package provides a small footprint.Integration of the high voltage startup saves approximately0.7 W of power compared to resistor bootstrapped circuits.The MC33368 features a watchdog timer to initiateoutput switching, a one quadrant multiplier to force theline current to follow the instantaneous line voltage, azero current detector to ensure critical conduction operation,a transconductance error amplifier, a current sensingcomparator, a 5.0 V reference, an undervoltage lockout(UVLO) circuit which monitors the VCC supplyvoltage, and a CMOS driver for driving MOSFETs. TheMC33368 also includes a programmable output switchingfrequency clamp. Protection features include an outputovervoltage comparator to minimize overshoot, arestart delay timer, and cycle–by–cycle current limiting.• Lossless Off–Line Startup• Output Overvoltage Comparator• Leading Edge Blanking (LEB) for Noise Immunity• Watchdog Timer to Initiate Switching• Restart Delay TimerD21N5406D4C51.092 to270 VacEMIFilterD1D316LineVrefVrefMC33368R51.3 MR310.5 kR81.0 MC9330 µFRD2AGndC20.018Mult51.5 VMultiplierLowLoad Detect4CompC11.0QTimerRRS LatchRRSS QSSet DominantOvervoltageComparator1.08 x VrefQuickstart1VrefC60.15.0 VReference15 VUVLOZeroCurrentDetectFrequencyClampLeading EdgeBlankingVref1.2/1.0313/8.01.5 VFB1N4744VCC D8127 15 VZCDGate11PGnd1013FC9LEB6CSR422 kR1351C4100VrefC80.001R1110R1010 kD61N4934C7470 pFR910TQ1MUR460D5C3330MTW20N50ER70.1R2820 kR110 khttp://onsemi.com91

SMPSRMGreenLine Power Factor ControllerMC33260PThe MC33260 is developed to control Power FactorCorrection preconverters meeting IEC1000–3–2 standardrequirements in electronic ballast and off–linepower conversion applications. Designed to work in freefrequency critical conduction mode, it can also be synchronizedand in any case, it features very effectiveprotections to ensure a safe and reliable operation.This circuit is also optimized to offer extremelycompact and cost–effective PFC solutions. In effect,while requiring a minimum number of externalcomponents, the MC33260 also proposes a free outputvoltage level mode (follower boost technique) thatenables a drastic size reduction of both the inductor andthe power mosfet. Ultimately, the solution system cost issignificantly lowered.Also able to function in traditional way (constantoutput voltage regulation level), any intermediarysolutions can be easily implemented. This flexibilitymakes it ideal to optimally cope with a wide range ofapplications.General Features• “Free Level’’ or Traditional Constant Output LevelMode• Switch Mode Operation: Voltage Mode• Latching PWM for Cycle–by–Cycle On–TimeControl• Totem Pole Gate Drive• Undervoltage Lockout with Hysteresis• Low Start–up and Operating Current• Improved Regulation Block Dynamic Behaviour• Synchronization Facility• Internally Trimmed Reference Current SourceSafety/Protection Features• Overvoltage Protection: Output OvervoltageDetection• Undervoltage Protection: Protection Against OpenLoop• Accurate Demagnetization (Zero Current Detection)Protection• Precise and Adjustable Maximum On–TimeLimitation• Over Current ProtectionORDERING INFORMATIONDevice Temperature Range PackageMC33260P –40° to +105°C Plastic DIP–8Typical ApplicationD1 . . . D41 µFD1VcontrolRcs1234MC33260Vcc8765syncQ1+C1RoLoad(SMPS, LampBallast, . . .)RsCTGreenLine is a trademark of Semiconductor Components Industries, LLC (SCILLC)http://onsemi.com92

Voltage ReferencesSMPSRMIn Brief . . .ON Semiconductor’s line of precision voltage referencesis designed for applications requiring high initial accuracy,low temperature drift, and long term stability. Initialaccuracies of ±1.0%, and ±2.0% mean production lineadjustments can be eliminated. Temperature coefficientsof 25 ppm/°C max (typically 10 ppm/°C) provide excellentstability. Uses for the references include D/A converters,A/D converters, precision power supplies, voltmetersystems, temperature monitors, and many others.PagePrecision Low Voltage References . . . . . . . . . . . . . . . 94ANALOG INTEGRATED CIRCUITSSIGNALCONDITIONINGBATTERYMANAGEMENTPOWERMANAGEMENTINTERFACETHERMALMANAGEMENTSPECIALFUNCTIONS/OTHERSAPPLICATIONSPECIFICSTANDARDPRODUCTSOp–AmpsComparatorsLithiumBatteryProtectionICsChargeControllersDC–DCConverterswith InductorInductorlessVoltageConvertersOff–Line SMPSControllersHigh Voltage Off–LineSwitching RegulatorsPower Factor ControllersVoltage ReferencesDataTransmissionDisplayDriversTemperatureSensorsLogicOutputSerialOutputFanControllersTimersLinear Four–QuadrantMultiplierAutomotive/MotorControl/IndustrialWireless &PortableApplicationsComputing&NetworkingSmartCardsLinear VoltageRegulatorsLDO Linear VoltageRegulatorsDriversDedicated PowerManagement ControllersSupervisory ICshttp://onsemi.com93

SMPSRMPrecision Low Voltage ReferencesA family of precision low voltage bandgap reference devices designed for applications requiring low temperature drift.Table 1. Precision Low Voltage ReferencesVout(V)TypIO(mA)MaxVout/TDevice(ppm/°C)Max 0° to +70°C –40° to +85°CRegline(mV)MaxRegload(mV)MaxPackage1.235 ± 12 mV 20 80 Typ LM385BZ–1.2 LM285Z–1.2 (Note 1) 1.0 TO–92, SO–81.235 ± 25 mVLM385Z–1.2(Note 2)2.5 ± 38 mV LM385BZ–2.5 LM285Z–2.5 2.02.5 ± 75 mV LM385Z–2.5 (Note 3)2.5 ± 25 mV 10 2540MC1403BMC1403– 3.0/4.5(Note 4) 10(Note 5)2.5 to 37 100 50 Typ TL431C, AC, BC TL431I, AI, BI Shunt ReferenceDynamic Impedance(z) ≤ 0.5 ΩSO–8, DIP–8TO–92, DIP–8,SO–8, Micro–8Notes: 1. Micropower Reference Diode Dynamic Impedance (z) ≤ 1.0 Ω at I R = 100 µA.2. 10 µA ≤ I R ≤ 1.0 mA.3. 20 µA ≤ I R ≤ 1.0 mA.4. 4.5 V ≤ V in ≤ 15 V/15 V ≤ V in ≤ 40 V.5. 0 mA ≤ I L ≤ 10 mA.http://onsemi.com94

Linear Voltage RegulatorsSMPSRMIn Brief . . .ON Semiconductor’s broad portfolio of voltage regulatorscovers the whole spectrum of current levels, fromlow current levels of 80 mA to very high current levels ofup to 5 A, and in a very wide selection of voltages. Allthese products are available in multiple package versionswith a strong emphasis on surface mount packages, fromTSOP–5 or SOT23–5 leads up to D2PAK 5 leads.New developments have included low dropout, moreaccuracy, and less noise using bipolar technology orCMOS technology for a reduction of currentconsumption.PageLinear Voltage Regulators . . . . . . . . . . . . . . . . . . . . . . 96Micropower Voltage Regulatorsfor Portable Applications . . . . . . . . . . . . . . . . . . . . . . 100Special Voltage Regulators . . . . . . . . . . . . . . . . . . . . 109Special Regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . 109ANALOG INTEGRATED CIRCUITSSIGNALCONDITIONINGBATTERYMANAGEMENTPOWERMANAGEMENTINTERFACETHERMALMANAGEMENTSPECIALFUNCTIONS/OTHERSAPPLICATIONSPECIFICSTANDARDPRODUCTSOp–AmpsComparatorsLithiumBatteryProtectionICsChargeControllersDC–DCConverterswith InductorInductorlessVoltageConvertersOff–Line SMPSControllersHigh Voltage Off–LineSwitching RegulatorsPower Factor ControllersVoltage ReferencesDataTransmissionDisplayDriversTemperatureSensorsLogicOutputSerialOutputFanControllersTimersLinear Four–QuadrantMultiplierAutomotive/MotorControl/IndustrialWireless &PortableApplicationsComputing&NetworkingSmartCardsLinear VoltageRegulatorsLDO Linear VoltageRegulatorsDriversDedicated PowerManagement ControllersSupervisory ICshttp://onsemi.com95

SMPSRMLinear Voltage RegulatorsFixed OutputThese low cost monolithic circuits provide positiveand/or negative regulation at currents from 100 mA to3.0 A. They are ideal for on–card regulation employingcurrent limiting and thermal shutdown. Low VDiffTable 1. Linear Voltage RegulatorsDeviceVout25°CTol.±%VinMaxFixed Voltage, 3–Terminal Regulators, 0.1 Amperesdevices are offered for battery powered systems.Although designed primarily as fixed voltageregulators, these devices can be used with externalcomponents to obtain adjustable voltages and currents.Vin–VoutDiff.Typ.ReglineMax(% Vout)RegloadMax(% Vout)Typ. Temp.CoefficientmV (Vout)°C PackageLM2931*/A–5.0* 5.0 5.0/3.8 40 0.16 0.6 1.0 0.2 SO–8,TO–92,D2PAK,DPAK,TO–220LP2950C*/AC* 3.0 0.5 30 0.38 0.2/0.1 0.2/0.1 0.04 DPAK,TO–923.3 DPAK,TO–925.0 DPAK,TO–92MC78LXXC/AC/AB* 5.0, 8.0, 9.0 8.0/4.0 30 1.7 4.0/3.0 1.2 0.2 DIP–8,SOP–8MC78LXXC/AC/AB* 12, 15, 18 8.0/4.0 35 1.7 2.0 1.0 0.2 DIP–8,SOP–8MC78L24C/AC/AB* 24 8.0/4.0 40 1.7 2.0 1.0 0.2 DIP–8,SOP–8MC79L05C/AC/AB* –5.0 8.0/4.0 30 1.7 4.0/3.0 1.2 0.2 DIP–8,SOP–8MC79LXXC/AC/AB* –(12, 15, 18) 8.0/4.0 35 1.7 2.0 1.0 0.2 DIP–8,SOP–8MC79L24C/AC/AB* –24 8.0/4.0 40 1.7 2.0 1.0 0.2 DIP–8,SOP–8MC33160** 5.0 5.0 40 2.0 0.8 1.0 – DIP–16,SO–16LFixed Voltage, 3–Terminal Regulators, 0.5 AmperesMC78MXXB*/C 5.0, 6.0, 8.0, 12 4.0 35 2.0 1.0 2.0 ±0.04 DPAK,TO–220MC78MXXB*/C 15, 18 4.0 35 2.0 1.0 2.0 ±0.04 DPAK,TO–220MC78MXXB*/C 20, 24 4.0 40 2.0 0.25 2.0 ±0.04 DPAK,TO–220MC79MXXB*/C –(5.0, 8.0, 12, 15) 4.0 35 1.1 1.0 2.0 –0.07 to±0.04DPAK,TO–220Unless otherwise noted, T J = 0° to +125°C* T J = –40° to +125°C** T A = –40° to +85°Chttp://onsemi.com96

SMPSRMDeviceVout25°CTol.±%VinMaxVin–VoutDiff.Typ.ReglineMax(% Vout)RegloadMax(% Vout)Typ. Temp.CoefficientmV (Vout)°CPackageFixed Voltage, 3–Terminal Regulators, 0.5 AmperesMC33267* 5.05 2.0 40 0.58 1.0 1.0 – D2PAK,TO–220Fixed Voltage, 3–Terminal Medium Dropout Regulators, 0.8 AmperesMC33269–XX* 3.3, 5.0, 12 1.0 20 1.0 0.3 1.0 – SO–8,DPAK,TO–220,SOT–223MC34268 2.85 1.0 15 0.95 0.3 1.0 – SO–8,DPAKFixed Voltage, 3–Terminal Regulators, 1.0 AmperesMC78XXB*/C/AC 5.0, 6.0, 8.0, 12,184.0/2.0 35 2.0 2.0/1.0 2.0 –0.06 to–0.22D2PAK,TO–220MC7824B*/C/AC 24 4.0/2.0 40 2.0 2.0/1.0 2.0/0.4 0.125 D2PAK,TO–220MC79XXC/AC –(5.0, 6.0) 4.0/2.0 35 2.0 2.0/1.0 2.0 –0.2 D2PAK,TO–220MC79XXC/AC –(8.0, 12, 15, 18) 4.0/2.0 35 2.0 2.0/1.0 2.0/1.25 –0.12 to–0.06D2PAK,TO–220MC7924C –24 4.0 40 2.0 1.0 2.0 –0.04 D2PAK,TO–220LM340/A–XX 5.0, 12, 15 4.0/2.0 35 1.7 1.0/0.2 1.0/0.5 ±0.12 TO–220Fixed Voltage, 3–Terminal Regulators, 3.0 AmperesMC78TXXC/AC 5.0, 8.0, 12 4.0/2.0 35 2.5 0.5 0.6 0.04 TO–220MC78T15C/AC 15 4.0/2.0 40 2.5 0.5 0.6 0.04 TO–220LM323/A 5.0 4.0/2.0 20 2.3 0.5/0.3 2.0/1.0 ±0.2 TO–220Unless otherwise noted, T J = 0° to +125°C* T J = –40° to +125°C** T A = –40° to +85°Chttp://onsemi.com97

SMPSRMTable 2. Fixed Voltage Medium and Low Dropout RegulatorsDeviceVout25°CTol.±%IO(mA)MaxFixed Voltage, Medium Dropout RegulatorsVinMaxVin–VoutDiff.Typ.ReglineMax(% Vout)RegloadMax(% Vout)Typ.Temp.CoefficientmV (Vout)°C PackageMC33267* 5.05 2.0 500 40 0.58 1.0 1.0 – D2PAK,TO–220MC34268 2.85 1.0 800 15 0.95 0.3 1.0 SO–8, DPAKMC33269–XX* 3.3, 5.0, 12 20 1.0 SO–8,DPAK,TO–220,SOT–223Fixed Voltage, Low Dropout RegulatorsLM2931*/A* 5.0 5.0/3.8 100 37 0.16 1.12 1.0 ±2.5 SO–8,D2PAK,DPAK,TO–220,TO–92LP2950C*/AC* 3.0 1.0/0.5 100 30 0.38 0.2/0.1 0.2/0.1 0.2 DPAK,TO–923.3 DPAK,TO–925.0 DPAK,TO–92LP2951C*/AC* 3.0 1.0/0.5 100 28.75 0.38 0.04/0.02 0.04/0.02 ±1.0 SO–8,Micro–8,DIP–83.3 SO–8,Micro–8,DIP–85.0 SO–8,Micro–8,DIP–8LM2935* 5.0/5.0 5.0/5.0 500/10 60 0.45/0.55 1.0 1.0 – TO–220,D2PAKUnless otherwise noted, T J = 0° to +125°C* T J = –40° to +125°Chttp://onsemi.com98

SMPSRMAdjustable OutputON Semiconductor offers a broad line of adjustableoutput voltage regulators with a variety of output currentcapabilities. Adjustable voltage regulators provide usersthe capability of stocking a single integrated circuitoffering a wide range of output voltages for industrial andcommunications applications. The three–terminaldevices require only two external resistors to set theoutput voltage.Table 3. Adjustable Output RegulatorsDeviceVoutIO(mA)MaxVinMaxVin–VoutDiff.Typ.ReglineMax(% Vout)RegloadMax(% Vout)Typ. Temp.CoefficientmV (Vout)°C PackageAdjustable RegulatorsLM317L/B* 2.0–37 100 40 1.9 0.07 1.5 ±0.35 SO–8, TO–92LM2931C* 3.0–24 100 37 0.16 1.12 1.0 ±2.5 SO–8, D2PAK,TO–220, TO–92LP2951C*/AC* 1.25–29 100 28.75 0.38 0.04/0.02 0.04/0.02 ±1.0 SO–8, DIP–8,Micro–8SO–8, DIP–8,Micro–8SO–8, DIP–8,Micro–8MC1723C# 2.0–37 150 38 2.5 0.5 0.2 ±0.033 DIP–14, SO–14LM317M/B* 1.2–37 500 40 2.1 0.04 0.5 ±0.35 DPAK, TO–220LM337M/B* –(1.2–37) 500 40 1.9 0.07 1.5 ±0.3 TO–220MC33269* 1.25–19 800 18.75 1.0 0.3 0.5 ±0.4 SO–8, DPAK,TO–220, SOT–223LM317/B* 1.2–37 1500 40 2.25 0.07 1.5 ±0.35 TO–220, D2PAKLM337/B* –(1.2–37) 1500 40 2.3 0.07 1.5 ±0.3 TO–220, D2PAKLM350/B* 1.2–33 3000 35 2.7 0.07 1.5 ±0.5 TO–220Unless otherwise noted, T J = 0° to +125°C* T J = –40° to +125°C# T A = 0° to +70°Chttp://onsemi.com99

SMPSRMMicropower Voltage Regulators for PortableApplications80 mA Micropower Voltage RegulatorMC78LC00H, NTA = –30° to +80°C, SOT–89, SOT–23 5 LeadsThe MC78LC00 series voltage regulators arespecifically designed for use as a power source for videoinstruments, handheld communication equipment, andbattery powered equipment.The MC78LC00 series features an ultra–low quiescentcurrent of 1.1 µA and a high accuracy output voltage. Eachdevice contains a voltage reference, an error amplifier, adriver transistor and resistors for setting the outputvoltage. These devices are available in either SOT–89, 3pin, or SOT–23, 5 pin, surface mount packages.MC78LC00 Series Features:• Low Quiescent Current of 1.1 µA Typical• Low Dropout Voltage (220 mV at 10 mA)• Excellent Line Regulation (0.1%)• High Accuracy Output Voltage (±2.5%)• Wide Output Voltage Range (2.0 V to 6.0 V)• Output Current for Low Power (up to 80 mA)• Two Surface Mount Packages (SOT–89, 3 Pin, orSOT–23, 5 Pin)ORDERING INFORMATION23DeviceOutputVoltageOperatingTemperatureRangePackageVinVOMC78LC30HT1 3.0MC78LC33HT1 3.3MC78LC40HT1 4.0MC78LC50HT1 5.0MC78LC30NTR 3.0TA A = –30° to+80°CMC78LC33NTR 3.3MC78LC40NTR 4.0MC78LC50NTR 5.0SOT–89SOT–23Vref1Other voltages from 2.0 to 6.0 V, in 0.1 V increments, are availableupon request. Consult factory for information.Gndhttp://onsemi.com100

120 mA Micropower Voltage RegulatorMC78FC00HTA = –30° to +80°C, SOT–89The MC78FC00 series voltage regulators arespecifically designed for use as a power source for videoinstruments, handheld communication equipment, andbattery powered equipment.The MC78FC00 series voltage regulator ICs featurea high accuracy output voltage and ultra–low quiescentcurrent. Each device contains a voltage reference unit, anerror amplifier, a driver transistor, and resistors for settingoutput voltage, and a current limit circuit. Thesedevices are available in SOT–89 surface mount packages,and allow construction of an efficient, constantvoltage power supply circuit.SMPSRMMC78FC00 Series Features:• Ultra–Low Quiescent Current of 1.1 µA Typical• Ultra–Low Dropout Voltage (100 mV at 10 mA)• Large Output Current (up to 120 mA)• Excellent Line Regulation (0.1%)• Wide Operating Voltage Range (2.0 V to 10 V)• High Accuracy Output Voltage (±2.5%)• Wide Output Voltage Range (2.0 V to 6.0 V)• Surface Mount Package (SOT–89)ORDERING INFORMATION23DeviceOutputVoltageOperatingTemperatureRangePackageVinVOMC78FC30HT1 3.0MC78FC33HT1 3.3 TA = –30° toMC78FC40HT1 4.0 +80°CMC78FC50HT1 5.0SOT–89Other voltages from 2.0 to 6.0 V, in 0.1 V increments, are availableupon request. Consult factory for information.Vref1Gndhttp://onsemi.com101

SMPSRMMicropower Voltage Regulator for External Power TransistorMC78BC00NTA = –30° to +80°C, SOT–23 5 LeadsThe MC78BC00 voltage regulators are specificallydesigned to be used with an external power transistor todeliver high current with high voltage accuracy and lowquiescent current.The MC78BC00 series are devices suitable forconstructing regulators with ultra–low dropout voltageand output current in the range of several tens of mA tohundreds of mA. These devices have a chip enablefunction, which minimizes the standby mode currentdrain. Each of these devices contains a voltage referenceunit, an error amplifier, a driver transistor and feedbackresistors. These devices are available in the SOT–23, 5pin surface mount packages.These devices are ideally suited for battery poweredequipment, and power sources for hand–held audioinstruments, communication equipment and domesticappliances.MC78BC00 Series Features:• Ultra–Low Supply Current (50 µA)• Standby Mode (0.2 µA)• Ultra–Low Dropout Voltage (0.1 V with ExternalTransistor and IO = 100 mA)• Excellent Line Regulation (Typically 0.1%/V)• High Accuracy Output Voltage (±2.5%)DeviceORDERING INFORMATIONOutputVoltageOperatingTemperatureRangePackage2VinExt43VOMC78BC30NTR 3.0MC78BC33NTR 3.3 TA = –30° to SOT–23MC78BC40NTR 4.0 +80°C 5 LeadsMC78BC50NTR 5.0Other voltages from 2.0 to 6.0 V, in 0.1 V increments, are availableupon request. Consult factory for information.Vref1CE5Gndhttp://onsemi.com102

Micropower Voltage Regulators for Portable Applications (continued)Low Noise 150 mA Low Drop Out (LDO) Linear Voltage RegulatorMC78PC00TA = –40° to +85°C, SOT–23 5 Lead PackageThe MC78PC00 are a series of CMOS linear voltageregulators with high output voltage accuracy, low supplycurrent, low dropout voltage, and high Ripple Rejection.Each of these voltage regulators consists of an internalvoltage reference, an error amplifier, resistors, a currentlimiting circuit and a chip enable circuit.The dynamic Response to line and load is fast, whichmakes these products ideally suited for use in hand–heldcommunication equipment.The MC78PC00 series are housed in the SOT–23 5lead package, for maximum board space saving.MC78PC00 Series Features:• Ultra–Low Supply Current: typical 35 A in ONmode with no loadSMPSRM• Standby Mode: typical 0.1 A• Low Dropout Voltage: typical 0.2 V @ IOUT =100 mA• High Ripple Rejection: typical 70 dB @ f = 1 kHz• Low Temperature–Drift Coefficient of OutputVoltage: typical ±100 ppm/°C• Excellent Line Regulation: typical 0.05%/V• High Accuracy Output Voltage: ±2.0%• Fast Dynamic Response to Line and Load• Small Package: SOT–23 5 leads• Built–in Chip Enable circuit (CE input pin)• Similar Pinout to the LP2980/1/2 and MIC5205DeviceMC78PC18NTRMC78PC28NTRMC78PC30NTRMC78PC33NTRMC78PC50NTRORDERING INFORMATIONOperatingTemperature RangeTA = –40° to +85°COther voltages are available. Consult your ON Semiconductorrepresentative.PackageSOT–235 LeadsBlock Diagram1VINMC78PCxx5V OUTVrefCURRENT LIMITCE 32 GNDhttp://onsemi.com103

SMPSRMMicropower Voltage Regulators for Portable Applications (continued)Ultra Low Noise 150 mA Low Dropout Voltage Regulatorwith ON/OFF ControlMC33263TA = –40° to +85°C, SOT23–LHoused in a SOT23–L package, the MC33263 deliversup to 150 mA where it exhibits a typical 180 mV dropout.With an incredible noise level of 25 VRMS (over100 Hz to 100 kHz, with a 10 nF bypass capacitor), theMC33263 represents the ideal choice for sensitive circuits,especially in portable applications where noise performanceand space are premium. The MC33263 alsoexcels in response time and reacts in less than 25 s whenreceiving an OFF to ON signal (with no bypasscapacitor).Thanks to a novel concept, the MC33263 accepts outputcapacitors without any restrictions regarding theirEquivalent Series Resistance (ESR) thus offering anobvious versatility for immediate implementation.With a typical DC ripple rejection better than –90 dB(–70 dB @ 1 kHz), it naturally shields the downstreamelectronics against choppy power lines.Additionally, thermal shutdown and short–circuitprotection provide the final product with a high degree ofruggedness.MC33263 Features:• Very Low Quiescent Current 170 µA (ON, no load),100 nA (OFF, no load)• Very Low Dropout Voltage, typical value is 137 mVat an output current of 100 mA• Very Low Noise with external bypass capacitor(10 nF), typically 25 µVrms over 100 Hz to 100 kHz• Internal Thermal Shutdown• Extremely Tight Line Regulation typically –90 dB• Ripple Rejection –70 dB @ 1 kHz• Line Transient Response: 1 mV for Vin = 3 V• Extremely Tight Load Regulation, typically 20 mVat Iout = 150 mA• Multiple Output Voltages Available• Logic Level ON/OFF Control (TTL–CMOSCompatible)• ESR can vary from 0 to 3• Functionally and Pin Compatible with TK112xxA/BSeriesORDERING INFORMATIONDeviceMC33263NW–28R2MC33263NW–30R2MC33263NW–32R2MC33263NW–33R2MC33263NW–38R2MC33263NW–40R2MC33263NW–47R2MC33263NW–50R2OperatingTemperature RangeTA = –40° to +85°CPackageSOT23–LMC33263 Block DiagramON/OFFShutdown 1 ThermalShutdown6InputBypass 3 2Band GapReference4OutputGND* Current Limit* Antisaturation* Protection5GNDhttp://onsemi.com104

Micropower Voltage Regulators for Portable Applications (continued)Micropower smallCAP Voltage Regulators with On/Off ControlMC33264D, DMSMPSRMTA = –40° to +85°C, SO–8, Micro–8The MC33264 series are micropower low dropoutvoltage regulators available in SO–8 and Micro–8surface mount packages and a wide range of outputvoltages. These devices feature a very low quiescentcurrent (100 µA in the ON mode; 0.1 µA in the OFFmode), and are capable of supplying output currents upto 100 mA. Internal current and thermal limitingprotection is provided. They require only a small outputcapacitance for stability.Additionally, the MC33264 has either active HIGH oractive LOW control (Pins 2 and 3) that allows a logiclevel signal to turn–off or turn–on the regulator output.Due to the low input–to–output voltage differentialand bias current specifications, these devices are ideallysuited for battery powered computer, consumer, andindustrial equipment where an extension of usefulbattery life is desirable.MC33264 Features:• Low Quiescent Current (0.3 µA in OFF Mode;95 µA in ON Mode)• Low Input–to–Output Voltage Differential of 47 mVat 10 mA, and 131 mV at 50 mA• Multiple Output Voltages Available• Extremely Tight Line and Load Regulation• Stable with Output Capacitance of Only0.22 µF for 4.0 V, 4.75 V and 5.0 V Output Voltages0.33 µF for 2.8 V, 3.0 V, 3.3 V and 3.8 V OutputVoltages• Internal Current and Thermal Limiting• Logic Level ON/OFF Control• Functionally Equivalent to TK115XXMC andLP2980ORDERING INFORMATIONDeviceMC33264D–2.8MC33264D–3.0MC33264D–3.3MC33264D–3.8MC33264D–4.0MC33264D–4.75MC33264D–5.0MC33264DM–2.8MC33264DM–3.0MC33264DM–3.3MC33264DM–3.8MC33264DM–4.0MC33264DM–4.75MC33264DM–5.0OperatingTemperature RangeTA = –40° to +85°CPackageSO–8Micro–818Vin2On/OffThermal andAnti–SatProtectionRintVO7Base3On/Off1.23 VVrefMC3326452.5 k5Adj6Gndhttp://onsemi.com105

SMPSRMMicropower Voltage Regulators for Portable Applications (continued)Ultra Low–Noise Low Dropout Voltage Regulatorwith 1V ON/OFF ControlMC33761TA = –40° to +85°C, TSOP–5The MC33761 is a Low DropOut (LDO) regulatorfeaturing excellent noise performances. Thanks to itsinnovative concept, the circuit reaches an incredible40µVRMS noise level without an external bypasscapacitor. Housed in a small SOT–23 5 leads–likepackage, it represents the ideal designer’s choice whenspace and noise are at premium.The absence of external bandgap capacitor unleashesthe response time to a wake–up signal and makes it staywithin 40µs (in repetitive mode), pushing the MC33761as a natural candidate in portable applications.The MC33761 also hosts a novel architecture whichprevents excessive undershoots when the regulator is theseat of fast transient bursts, as in any bursting systems.Finally, with a static line regulation better than –75dB,it naturally shields the downstream electronics againstchoppy lines.MC33761 Features:• Ultra low–noise: 150nV/√Hz @ 100Hz, 40µVRMS100Hz – 100kHz typical, Iout = 60mA, Co=1µF• Fast response time from OFF to ON: 40µs typical ata 200Hz repetition rate• Ready for 1V platforms: ON with a 900mVhighlevel• Nominal output current of 80mA with a 100mApeak capability• Typical dropout of 90mV @ 30mA, 160mV @80mA• Ripple rejection: 70dB @ 1kHz• 1.5% output precision @ 25°C• Thermal shutdown• Vout available from 2.5V to 5.0VApplications:• Noise sensitive circuits: VCOs RF stages etc.• Bursting systems (TDMA phones)• All battery operated devicesDeviceORDERING INFORMATIONOperatingTemperature RangePackageMC33761SNT1–25MC33761SNT1–28 TA = –40° to +85°C TSOP–5MC33761SNT1–30Simplified Block DiagramON/OFFNC34On/OffBand GapReferenceThermalShutdown1VinGND2*Current Limit*Antisaturation Protection*Load Transient Improvement5Vouthttp://onsemi.com106

SMPSRMMicropower Voltage Regulators for Portable Applications (continued)Dual Ultra Low–Noise Low Dropout Voltage Regulatorwith 1V ON/OFF ControlMC33762TA = –40° to +85°C, Micro8The MC33762 is a dual Low DropOut (LDO)regulator featuring excellent noise performances.Thanks to its innovative concept, the circuit reaches anincredible 40µVRMS noise level without an externalbypass capacitor. Housed in a small µ8 package, itrepresents the ideal designer’s choice when space andnoise are at premium.The absence of external bandgap capacitor unleashesthe response time to a wake–up signal and makes it staywithin 40µs, pushing the MC33762 as a natural candidatein portable applications.The MC33762 also hosts a novel architecture whichprevents excessive undershoots when the regulator is theseat of fast transient bursts, as in any bursting systems.Finally, with a static line regulation better than –75dB,it naturally shields the downstream electronics againstchoppy lines.MC33762 Features:• Nominal output current of 80mA with a 100mApeak capability• Ultra low–noise: 150nV/√Hz @ 100Hz, 40µVRMS100Hz – 100kHz typical, Iout = 60mA, Co=1µF• Fast response time from OFF to ON: 40µs typical• Ready for 1V platforms: ON with a 900mVhighlevel• Typical dropout of 90mV @ 30mA, 160mV @80mA• Ripple rejection: 70dB @ 1kHz• 1.5% output precision @ 25°C• Thermal shutdown• Vout available from 2.5V to 5.0VApplications:• Noise sensitive circuits: VCOs RF stages etc.• Bursting systems (TDMA phones)• All battery operated devicesORDERING INFORMATIONDeviceOperatingTemperature RangePackageMC33762DM–2525R2MC33762DM–2828R2 TA = –40° to +85°C Micro8MC33762DM–3030R2http://onsemi.com107

SMPSRMSimplified Block DiagramEN12On/OffBand GapReferenceThermalShutdown7VCC1GND11*Current Limit*Antisaturation Protection*Load Transient Improvement8VoutEN24On/OffBand GapReferenceThermalShutdown5VCC2GND23*Current Limit*Antisaturation Protection*Load Transient Improvement6Vouthttp://onsemi.com108

Special Voltage RegulatorsSMPSRMTable 4. Voltage RegulatorsFunction Features Package DeviceMultifunction VeryLow Dropout VoltageRegulatorLow Dropout VoltageRegulatorLow Dropout VoltageRegulatorLow Dropout VoltageRegulatorLow Dropout VoltageRegulatorLow Dropout VoltageRegulatorA monolithic integrated 5.0 V voltage regulator with a very low dropoutand additional functions such as power–on reset and input voltagesense. It is designed for supplying the micro–computer controlledsystems especially in automotive applications.Fixed and adjustable positive output voltage regulators whichmaintain regulation with very low input–to–output voltage differential.Low voltage differential regulator featuring dual positive 5.0 Voutputs; switched currents in excess of 750 mA and 10 mA standbycurrent. Fixed quiescent current is less than 3.0 mA.Positive 5.0 V, 500 mA regulator with on–chip power–up–resetcircuit with externally programmable delay, current limit, and thermalshutdown.Positive 3.3 V, 5.0 V, 12 V, 800 mA regulator.DIP–8, SO–8TO–92, TO–220,DPAK, D2PAK, SO–8TO–220, D2PAKTO–220, D2PAKSO–8, DPAK,SOT–223, TO–220L4949LM2931SeriesLM2935MC33267MC33269Positive regulator with 5 outputs fixed 2.8 V and 13 V. TSSOP–16 MC33765Special RegulatorsVoltage Regulator/SupervisoryTable 5. Voltage Regulator/SupervisoryVout(V)Device Min MaxVinIO(V)(mA)Max Min MaxReglineRegloadTASuffix/(mV) Max (mV) Max (°C) PackageMC34160 4.75 5.25 100 7.0 40 40 50 0 to +70 DIP–16,MC33160 –40 to +85SO–16LMC33267 4.9 5.2 500 6.0 26 50 50 –40 to +105 TO–220,D2PAK* These ICs are intended for powering cellular phone GaAs power amplifiers and can be used for other portable applications as well.http://onsemi.com109

SMPSRMVoltage Regulator/Supervisory (continued)Microprocessor Voltage Regulator and Supervisory CircuitMC34160P, DWTA = 0° to +70°C, DIP–16, SO–16LMC33160P, DWTA = –40° to +85°C, DIP–16, SO–16LThe MC34160 series is a voltage regulator and supervisorycircuit containing many of the necessary monitoringfunctions required in microprocessor based systems. It isspecifically designed for appliance and industrial applicationsoffering the designer a cost effective solution withminimal external components. These integrated circuitsfeature a 5.0 V, 100 mA regulator with short circuit currentlimiting, pinned out 2.6 V bandgap reference, low voltagereset comparator, power warning comparator with programmablehysteresis, and an uncommitted comparatorideally suited for microprocessor line synchronization.Additional features include a chip disable input for lowstandby current, and internal thermal shutdown for overtemperature protection.These devices are contained in a 16 pin dual–in–lineheat tab plastic package for improved thermal conduction.VCC14ThermalShutdown0.913R0.01R117RegulatorOutputResetRChipDisable152.6 VReference16ReferenceOutputPowerSense98PowerWarningHysteresisAdjust10IHIH “On”/“Off”NoninvertingInput2InvertingInput16ComparatorOutputGnd 4, 5,12, 13http://onsemi.com110

SMPSRMVoltage Regulator/Supervisory (continued)Low Dropout RegulatorMC33267T, TVTJ = –40° to +105°C, TO–220 5 Leads, D2PAK 5 LeadsThe MC33267 is a positive fixed 5.0 V regulator thatis specifically designed to maintain proper voltageregulation with an extremely low input–to–output voltagedifferential. This device is capable of supplying outputcurrents in excess of 500 mA and contains internal currentlimiting and thermal shutdown protection. Also featuredis an on–chip power–up reset circuit that is ideally suitedfor use in microprocessor based systems. Whenever theregulator output voltage is below nominal, the reset outputis held low. A programmable time delay is initiated afterthe regulator has reached its nominal level and upontimeout, the reset output is released.Due to the low dropout voltage specifications, theMC33267 is ideally suited for use in battery poweredindustrial and consumer equipment where an extension ofuseful battery life is desirable. This device is contained inan economical five lead TO–220 type package.InputOutput13.015ReferenceR 20 µA1.25 VResetReset0.032R+ThermalOverCurrentDetectorGround 3R+Delay1.25 V3.8 V200Delay4http://onsemi.com111

SMPSRMVoltage Regulator/Supervisory (continued)Very Low Dropout RegulatorL4949N, DTJ = –40° to +125°C, DIP–8, SO–8The L4949 is a monolithic integrated 5.0 V voltageregulator with a very low dropout and additionalfunctions such as power–on reset and input voltage sense.It is designed for supplying the micro–computercontrolled systems especially in automotive applications.• Operating DC Supply Voltage Range 5.0 V to 28 V• Transient Supply Voltage Up to 40 V• Extremely Low Quiescent Current in Standby Mode• High Precision Standby Output Voltage 5.0 V ±1%• Output Current Capability Up to 100 mA• Very Low Dropout Voltage Less Than 0.4 V• Reset Circuit Sensing The Output Voltage• Programmable Reset Pulse Delay With ExternalCapacitor• Voltage Sense Comparator• Thermal Shutdown and Short Circuit ProtectionsSupplyVoltage (V CC )1Preregulator6.0 VV ZOutputVoltage (V out )3 8 C T 4SenseInput(S i )22.0 µA+2.0 VRegulator–ResetV s+1.23 V–1.23 V ref SenseReset6SenseOutput(S o )75Gndhttp://onsemi.com112

Voltage Regulator/Supervisory (continued)Very Low Dropout/Ultra Noise 5 Outputs Voltage RegulatorMC33765TA = 40° to +85°C, TSSOP16The MC33765 is an ultra low noise, very low dropoutvoltage regulator with five independent outputs which isavailable in TSSOP 16 surface mount package.Two versions are available: 2.8 V or 3.0 V. The voltageof all five outputs is 2.8 V or 3.0 V typical but each outputis capable of supplying different currents up to 150 mAfor output 4. The device features a very low dropout voltage(0.11 V typical for maximum output current), verylow quiescent current (5.0 mA maximum in OFF mode,130 mA typical in ON mode) and one of the output (output3) exhibits a very low noise level which allows thedriving of noise sensitive circuitry. Internal current andthermal limiting protections are provided.Additionally, the MC33765 has an independentEnable input pin for each output. It includes also a commonEnable pin to shutdown the complete circuit whennot used. The Common Enable pin has the highest priorityover the five independent Enable input pins.The voltage regulators VR1, VR2 and VR3 have acommon input voltage pin VCC1.SMPSRMThe other voltage regulators VR4 and VR5 have acommon input voltage pin VCC2.MC33765 Features:• Five Independent Outputs at 2.8 V or 3.0 V Typical• Internal Trimmed Voltage Reference• Vout Tolerance ±3.0% at 25°C• Enable Input Pin (Logic–Controlled Shutdown) forEach of the Five Outputs• Common Enable Pin to Shutdown the Whole Circuit• Very Low Dropout Voltage (0.11 V Typical forOutput 1, 2, 3 and 5; 0.17 V Typical for Output 4 atMaximum Current)• Very Low Quiescent Current (Maximum 5.0 µA inOFF Mode, 130 µA Typical in ON Mode)• Ultra Low Noise for VR3 (30 µV RMS Max,100 Hz < f < 100 kHz)• Internal Current and Thermal Limit• 100 nF for VR1, VR2, VR4 and VR5 and 1.0 µF forVR3 for Stability• Supply Voltage Rejection: 60 dB (Typical) @f = 1.0 kHzORDERING INFORMATIONDeviceVoltage VersionOperatingTemperature RangePackageMC33765DTB, R2MC33765DTB–30, R22.8 V Fixed3.0 V FixedTA = 40° to +85°CTSSOP–16http://onsemi.com113

SMPSRMSimplified Block DiagramVCC1(15) CE (2)(10)VCC2(3)ON/OFF 1EnableCommonEnableCurrentLimitVCC1330 nF–BYPASS100 nFVoltageReference1.25 V+Temp.Shut.(14)VOUT1100 nF(4)ON/OFF 2EnableCurrentLimitVCC1–+Temp.Shut.(13)VOUT2100 nF(5)ON/OFF 3EnableCurrentLimitVCC1–+Temp.Shut.(12)VOUT31.0 F(6)ON/OFF 4EnableCurrentLimitVCC2–+Temp.Shut.(11)VOUT4100 nF(7)ON/OFF 5EnableCurrentLimitVCC2–+Temp.Shut.(9)VOUT5100 nF(8)GNDhttp://onsemi.com114

DriversSMPSRMPageMOSFET/IGBT Drivers . . . . . . . . . . . . . . . . . . . . . . . . 116Dedicated Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118Power Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119ANALOG INTEGRATED CIRCUITSSIGNALCONDITIONINGBATTERYMANAGEMENTPOWERMANAGEMENTINTERFACETHERMALMANAGEMENTSPECIALFUNCTIONS/OTHERSAPPLICATIONSPECIFICSTANDARDPRODUCTSOp–AmpsComparatorsLithiumBatteryProtectionICsChargeControllersDC–DCConverterswith InductorInductorlessVoltageConvertersOff–Line SMPSControllersHigh Voltage Off–LineSwitching RegulatorsPower Factor ControllersVoltage ReferencesDataTransmissionDisplayDriversTemperatureSensorsLogicOutputSerialOutputFanControllersTimersLinear Four–QuadrantMultiplierAutomotive/MotorControl/IndustrialWireless &PortableApplicationsComputing&NetworkingSmartCardsLinear VoltageRegulatorsLDO Linear VoltageRegulatorsDriversDedicated PowerManagement ControllersSupervisory ICshttp://onsemi.com115

SMPSRMMOSFET/IGBT DriversHigh Speed Dual Drivers(Inverting)MC34151P, DTA = 0° to +70°C, DIP–8, SO–8MC33151P, DTA = –40° to +85°C, DIP–8, SO–8These two series of high speed dual MOSFET driverICs are specifically designed for applications requiringlow current digital circuitry to drive large capacitiveloads at high slew rates. Both series feature a uniqueundervoltage lockout function which puts the outputs ina defined low state in an undervoltage condition. Inaddition, the low “on” state resistance of these bipolardrivers allows significantly higher output currents atlower supply voltages than with competing drivers usingCMOS technology.(Noninverting)MC34152P, DTA = 0° to +70°C, DIP–8, SO–8MC33152P, DTA = –40° to +85°C, DIP–8, SO–8The MC34151 series is pin–compatible with theMMH0026 and DS0026 dual MOS clock drivers, and canbe used as drop–in replacements to upgrade systemperformance. The MC34152 noninverting series is amirror image of the inverting MC34151 series.These devices can enhance the drive capabilities offirst generation switching regulators or systems designedwith CMOS/TTL logic devices. They can be used indc–to–dc converters, motor controllers, capacitor chargepump converters, or virtually any other applicationrequiring high speed operation of power MOSFETs.VCC6MC341515.7 VLogicInput A2100 k7DriveOutput ALogicInput B4100 k5DriveOutput BGnd3http://onsemi.com116

SMPSRMMOSFET/IGBT Drivers (continued)Single IGBT DriverMC33153P, DTA = –40° to +105°C, DIP–8, SO–8The MC33153 is specifically designed to drive thegate of an IGBT used for ac induction motors. It can beused with discrete IGBTs and IBGT modules up to 100 A.Typical applications are ac induction motor control,brushless dc motor control, and uninterruptable powersupplies.These devices are available in dual–in–line andsurface mount packages and include the followingfeatures:• High Current Output Stage : 1.0 A Source – 2.0 ASink• Protection Circuits for Both Conventional andSenseIGBTs• Current Source for Blanking Timing• Protection Against Overcurrent and Short Circuit• Undervoltage Lockout Optimized for IGBT’s• Negative Gate Drive CapabilityOutput7VCCOver–currentLatchVEESQRSQRShort CircuitComparatorOvercurrentComparatorVCCDesat./Blank.ComparatorVEEVCCVEEVCC128CurrentSenseInputKelvinGndBlankingDesaturationVCCVCCInput4VCC5GateDriveOutput3VEEVCC6VEEVEE VEEhttp://onsemi.com117

SMPSRMDedicated DriversHalf Bridge Controller and Driver for Industrial Linear TubesMC33157DWThe MC33157DW includes the oscillator circuit andtwo output channels to control a half–bridge power stage.One of the channels is ground–referenced. The secondone is floating to provide a bootstrap operation for thehigh side switch.Dedicated Driver for Industrial Linear Tubes• Main oscillator is current controlled, making it easyto set up by a single external resistor. On top of that,such a feature is useful to implement a dimmingfunction by frequency shift.• Filament preheating time control built–in.• The strike sequence is controllable by externalpassive components, the resonant frequency beingindependently adjustable. This frequency can bemade different from the preheating and the steadystate values. A frequency sweep between twodefined values makes this IC suitable for any serieresonant topologies.• Dedicated internal comparator provides an easylamp strike detection implementation.• Digital RESET pin provides a fast reset of thesystem (less than 10 µs). Both output Mosfet are setto “OFF’’ state when RESET is zero.• Adjustable dead time makes the product suitable forany snubber capacitor and size of MOSFET used aspower switches.• Designed to be used with standard setting capacitors470 nF.• A voltage reference, derived from the internalbandgap, is provided for external usage. Thisvoltage is 100% trimmed at probe level yielding a2% tolerance over the temperature range.DeviceORDERING INFORMATIONTested OperatingTemperature RangePackageMC33157DW TA = –40° to +85°C Plastic SO–16LR END SWPRPHCSWEEPCPHCOPROPVDD145367ICO2+VrefDT adjust89StrikeDetection10RESET15 VUULOBAND GAPREFERENCEVth+Vref(+7 V)+VrefIphPREHEAT & STRIKE CONTROLLatchQCENABLEDead TimeCONTROL LOGICSTRIKE detectionClearINHIBITIphIfstrike+VrefIopLEVELSHIFTER+VrefCOMPARATORHIGH SIDEBUFFERLOW SIDEBUFFERRRR161514131211VHSVHOVOUTNCVLOGNDhttp://onsemi.com118

SMPSRMPower ControllersAn assortment of battery and ac line–operated control ICs for specific applications are shown. They are designed toenhance system performance and reduce complexity in a wide variety of control applications.Zero Voltage SwitchCA3059TA = –40° to +85°C, DIP–14This device is designed for thyristor control in avariety of ac power switching applications for ac inputvoltages of 24 V, 120 V, 208/230 V, and 227 V @50/60 Hz.• Limiter–Power Supply – Allows operation directlyfrom an ac line.• Differential “On”/“Off” Sensing Amplifier – Testsfor condition of external sensors or input commandsignals. Proportional control capability or hysteresismay be implemented.• Zero–Crossing Detector – Synchronizes the outputpulses to the zero voltage point of the ac cycle.Eliminates RFI when used with resistive loads.• Triac Drive – Supplies high current pulses to theexternal power controlling thyristor.• Protection Circuit – A built–in circuit may beactuated, if the sensor opens or shorts, to remove thedrive circuit from the external triac.• Inhibit Capability – Thyristor firing may beinhibited by the action of an internal diode gate.• High Power DC Comparator Operation –Operation in this mode is accomplished byconnecting Pin 7 to 12 (thus overriding the action ofthe zero–crossing detector).VCCACInputVoltageRSLimiterDC Mode or400 Hz InputProtectionRP CircuitZeroCrossingDetectorPowerSupplyCurrentBoostTriacDriveGateRL*“On”/“Off”SensingAmpVCCGndInhibitExternal Trigger*NTC Sensorhttp://onsemi.com119

SMPSRMPower Controllers (continued)Zero Voltage ControllerUAA2016P, DTA = –20° to +85°C, DIP–8, SO–8The UAA2016 is designed to drive triacs with theZero Voltage technique which allows RFI free powerregulation of resistive loads. Operating directly on the acpower line, its main application is the precisionregulation of electrical heating systems such as panelheaters or irons.A built–in digital sawtooth waveform permitsproportional temperature regulation action over a ±1°Cband around the set point. For energy savings there is aprogrammable temperature reduction function, and forsecurity, a sensor failsafe inhibits output pulses when thesensor connection is broken. Preset temperature (i.e.,defrost) application is also possible. In applications wherehigh hysteresis is needed, its value can be adjusted up to 5°Caround the set point. All these features are implementedwith a very low external component count.• Zero Voltage Switch for Triacs, up to 2.0 kW(MAC212A8)• Direct AC Line Operation• Proportional Regulation of Temperature over a 1°CBand• Programmable Temperature Reduction• Preset Temperature (i.e., Defrost)• Sensor Failsafe• Adjustable Hysteresis• Low External Component CountFailsafeUAA2016Sense Input3+–SamplingFull WaveLogicPulseAmplifier6OutputTemperatureReduction4+ ++1/2InternalReference7+VCCHysteresisAdjustVoltageReference214–Bit DAC11–Bit CounterSynchronization8SupplyVoltage5SyncVEEhttp://onsemi.com120

Dedicated PowerManagement ControllersSMPSRMIn Brief . . .Dedicated power management controllers aredesigned and developed for specific applications likePDAs, Smart Card–based systems, or cellular phones.These controllers are utilizing mixed–signal processessuch as SMARTMOS for improved high performanceand precision characteristics. They have a high integrationlevel and may integrate multiple analog or digitalfunctions such as LDO voltage regulators, DC–DC converters,Analog–to–Digital converters, latches, andmultiple gates.PageGaAs Power Amplifier Support IC . . . . . . . . . . . . . . . 122Versatile 6 Regulator Power ManagementCircuit for Cellular Subscriber Terminal . . . . . . . . . . 123ANALOG INTEGRATED CIRCUITSSIGNALCONDITIONINGBATTERYMANAGEMENTPOWERMANAGEMENTINTERFACETHERMALMANAGEMENTSPECIALFUNCTIONS/OTHERSAPPLICATIONSPECIFICSTANDARDPRODUCTSOp–AmpsComparatorsLithiumBatteryProtectionICsChargeControllersDC–DCConverterswith InductorInductorlessVoltageConvertersOff–Line SMPSControllersHigh Voltage Off–LineSwitching RegulatorsPower Factor ControllersVoltage ReferencesDataTransmissionDisplayDriversTemperatureSensorsLogicOutputSerialOutputFanControllersTimersLinear Four–QuadrantMultiplierAutomotive/MotorControl/IndustrialWireless &PortableApplicationsComputing&NetworkingSmartCardsLinear VoltageRegulatorsLDO Linear VoltageRegulatorsDriversDedicated PowerManagement ControllersSupervisory ICshttp://onsemi.com121

SMPSRMGaAs Power Amplifier Support ICMC33169DTBTA = –40° to +85°C, TSSOP–14The MC33169 is a support IC for GaAs PowerAmplifier Enhanced FETs used in hand portabletelephones such as GSM, PCN and DECT. This deviceprovides negative voltages for full depletion of EnhancedMESFETs as well as a priority management system ofdrain switching, ensuring that the negative voltage isalways present before turning “on” the Power Amplifier.Additional features include an idle mode input and adirect drive of the N–Channel drain switch transistor.This product is available in one version, –4.0 V. The–4.0 V version is intended for supplying RF modules forGSM and DCS1800 applications.• Negative Regulated Output for Full Depletion ofGaAs MESFETs• Drain Switch Priority Management Circuit• CMOS Compatible Inputs• Idle Mode Input (Standby Mode) for Very LowCurrent Consumption• Output Signal Directly Drives N–Channel FET• Low Startup and Operating CurrentV BB Double+ –C1+12C3– + V CC2 C2 1 14+V Battery(2.7 to 7.0 V)V BB 11 3Triple +C4–V BBGenerator(Voltage Tripler)MC331698Gate Drive OutputMMSF4N01HDT x PowerControlInput913IdleMode Input6GndChargePumpSensePriorityManagementNegativeGeneratorRFIn10Sense InputPower AmplifierRFOut7–C p+5 4 – +VC O C i + fOutput(– 2.5 V or – 4.0 V)R fhttp://onsemi.com122

Versatile 6 Regulator Power Management Circuit for CellularSubscriber TerminalMC33283TA = 20°C to +70°C, TQFP–32The MC33283 is a complete power managementsolution for portable devices such as telephone handsets,two–way radios, etc. Thanks to its large scale integration,the device offers up to seven Low DropOut regulators(LDO), two of them delivering a voltage higher than thebattery’s.Despite the presence of an internal charge pump, theoverall noise specification makes the circuit an idealcandidate where noise is an important feature. Outputsdeliver 40µVRMS typical (10–100kHz) at nominaloutput current.With a 50dB ripple rejection under 10kHz, the circuitnaturally shields the downstream electronics against DCchoppy lines. This parameter guarantees a clean operationfor battery operated devices.SMPSRMFinally, housed in a compact Thin Quad Flat PackTQFP–32 package, the MC33283 gathers all the featuresnecessary to power future portable radios.• 6 regulated outputs:2.85V, four outputs: 10–135mA4.75V @ 15mA5.0V @ 20mA• Low–noise: 40µVRMS at nominal output levels(10Hz–100kHz)• Ultra–low reverse current in OFF mode (200nAtypical)• Two–mode regulator: output 5 switches from 3 to5V with SEL pin activated• Thermal shutdown for a rugged and reliableoperation• All outputs are short–circuit proofDeviceORDERING INFORMATIONOperatingTemperature RangePackageMC33283FTB28,R2 20°C to +70°C TQFP–32http://onsemi.com123

SMPSRMSimplified Block DiagramVCC2VCC229VCC15POR23VR15 A700 kVCC112BUBVR1UVLO222VR12 AUVLO2UVLO1UVLO1VrefVCC1R1VCC131OUT1REFERENCEVOLTAGEVrefON/OFF2VrefR23OUT2CBYPENRS2627HIGH = UVLOACTIVEON/OFF3OUT5 VOLTAGE VrefSELECTIONVCC1R34OUT3EN2EN3EN5EN6EN72821201930ENABLESWITCHESVCC2VCC2ON/OFF2ON/OFF3ON/OFF4ON/OFF5ON/OFF6VrefON/OFF5VrefR5AVCC1R5B6OUT5SEL18ON/OFF6VrefR610OUT6VCC1OVLOVCC2ON/OFF7VrefR72OUT76.5 VVS 1 IN14OVLO CP ENABLE VCC2VCC_CPCHARGE PUMP13 15 7 14 1D1B1GND CPVinGNDhttp://onsemi.com124

Supervisory ICsSMPSRMIn Brief . . .Power supplies, MCU–based systems, industrial controls,computer systems and many other products, portableor not, are requiring system management functions whichmonitor voltages to ensure proper system operation.These circuits monitor critical circuit conditions andreport any violations of prescribed limits to a microprocessor.The microprocessor will then take appropriate actionsuch as storing data before executing a graceful shutdown.ON Semiconductor offers a wide variety of voltage supervisorycircuits (Undervoltage or Overvoltage)designed for use where precise voltage limits or windowsare required for reliable system operation.Newer supervisory circuits have utilized CMOStechnology and miniature surface mount packages(SOT23–5 leads) to reduce the current consumption andthe PCB board area. This makes them particularly suitedfor battery–powered applications.PageSupervisory Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . 126Overvoltage Crowbar Sensing Circuit . . . . . . . . . 126Over/Undervoltage Protection Circuit . . . . . . . . . 127Micropower Undervoltage Sensing Circuits . . . . 128Micropower Undervoltage Sensing Circuitswith Programmable Output Delay . . . . . . . . . . . . 129Undervoltage Sensing Circuit . . . . . . . . . . . . . . . . 130Universal Voltage Monitor . . . . . . . . . . . . . . . . . . . 1313–Pin Microprocessor Reset Monitors . . . . . . . . 132Under Voltage Detector Series . . . . . . . . . . . . . . . 133ANALOG INTEGRATED CIRCUITSSIGNALCONDITIONINGBATTERYMANAGEMENTPOWERMANAGEMENTINTERFACETHERMALMANAGEMENTSPECIALFUNCTIONS/OTHERSAPPLICATIONSPECIFICSTANDARDPRODUCTSOp–AmpsComparatorsLithiumBatteryProtectionICsChargeControllersDC–DCConverterswith InductorInductorlessVoltageConvertersOff–Line SMPSControllersHigh Voltage Off–LineSwitching RegulatorsPower Factor ControllersVoltage ReferencesDataTransmissionDisplayDriversTemperatureSensorsLogicOutputSerialOutputFanControllersTimersLinear Four–QuadrantMultiplierAutomotive/MotorControl/IndustrialWireless &PortableApplicationsComputing&NetworkingSmartCardsLinear VoltageRegulatorsLDO Linear VoltageRegulatorsDriversDedicated PowerManagement ControllersSupervisory ICshttp://onsemi.com125

SMPSRMSupervisory CircuitsA variety of Power Supervisory Circuits are offered.Overvoltage sensing circuits which drive ‘‘Crowbar’’SCRs are provided in several configurations from a lowcost three–terminal version to 8–pin devices whichprovide pin–programmable trip voltages or additionalfeatures, such as an indicator output drive and remoteactivation capability. An over/undervoltage protectioncircuit is also offered.Overvoltage Crowbar Sensing CircuitMC3423P1, DTA = 0° to +70°C, DIP–8, SO–8 PackagesThis device can protect sensitive circuitry from powersupply transients or regulator failure when used with anexternal ‘‘Crowbar’’ SCR. The device senses voltage andcompares it to an internal 2.6 V reference. Overvoltage tripis adjustable by means of an external resistive voltage divider.A minimum duration before trip is programmablewith an external capacitor. Other features include a 300mA high current output for driving the gate of a ‘‘Crowbar’’SCR, an open–collector indicator output and remoteactivation capability.VCC1200 µA42CurrentSourceSense 1Vref2.6 V8Output7VEE Sense 235RemoteActivation6IndicatorOutputhttp://onsemi.com126

SMPSRMOver/Undervoltage Protection CircuitMC3425P1TA = 0° to +70°C, DIP–8 PackageThe MC3425 is a power supply supervisory circuitcontaining all the necessary functions required tomonitor over and undervoltage fault conditions. Thisdevice features dedicated over and undervoltage sensingchannels with independently programmable time delays.The overvoltage channel has a high current drive outputfor use in conjunction with an external SCR ‘‘Crowbar’’for shutdown. The undervoltage channel inputcomparator has hysteresis which is externallyprogrammable, and an open–collector output for faultindication.VCC8OVSense200 µA3UVSense200 µAOVDrive16UVIndicator4IH2.5 VVref12.5 µAInput Section5 2 7 GndUV OV Output SectionDLY DLYhttp://onsemi.com127

SMPSRMSupervisory Circuits (continued)Micropower Undervoltage Sensing CircuitsMC33464H, NTA = –30° to +80°C, SOT–89, SOT–23 5 Leads PackagesThe MC33464 series are micropower undervoltagesensing circuits that are specifically designed for use withbattery powered microprocessor based systems, whereextended battery life is required. A choice of severalthreshold voltages from 0.9 V to 4.5 V are available.These devices feature a very low quiescent bias currentof 0.8 µA typical.The MC33464 series features a highly accuratevoltage reference, a comparator with precise thresholdsand built–in hysteresis to prevent erratic reset operation,a choice of output configurations between open drain orcomplementary MOS, and guaranteed operation below1.0 V with extremely low standby current. These devicesare available in either SOT–89 3–pin or SOT–23 5–pinDeviceORDERING INFORMATIONThresholdVoltageTypesurface mount packages.Applications include direct monitoring of theMPU/logic power supply used in portable, appliance,automotive and industrial equipment.MC33464 Features:• Extremely Low Standby Current of 0.8 µA at Vin =1.5 V• Wide Input Voltage Range (0.7 V to 10 V)• Monitors Power Supply Voltages from 1.1 V to 5.0 V• High Accuracy Detector Threshold (±2.5%)• Two Reset Output Types (Open Drain orComplementary Drive)• Two Surface Mount Packages (SOT–89 or SOT–235–Pin)OperatingTemperature RangePackage(Qty/Reel)MC33464H–09AT1 0.9MC33464H–20AT1 2.0 OpenMC33464H–27AT1 2.7 DrainMC33464H–30AT1 3.0 ResetMC33464H–45AT1 4.5 SOT–89MC33464H–09CT1 0.9(1000)MC33464H–20CT1 2.0 Compl.MC33464H–27CT1 2.7 MOSMC33464H–30CT1 3.0 ResetMC33464H–45CT1 4.5MC33464N–09ATR 0.9 TA = –30° to +80°CMC33464N–20ATR2.0OpenMC33464N–21ATR2.1DrainMC33464N–27ATR 2.7MC33464N–30ATR 3.0ResetSOT–23MC33464N–45ATR 4.5 (3000)MC33464N–09CTR 0.95 LeadsMC33464N–20CTR 2.0 Compl.MC33464N–27CTR 2.7 MOSMC33464N–30CTR 3.0 ResetMC33464N–45CTR 4.5Other voltages from 0.9 to 6.0 V, in 0.1 V increments, are available. Consult factory for information.MC33464X–YYATZ Open Drain Configuration2 Input1ResetMC33464X–YYCTZ Complementary Drive Configuration2 Input1ResetVref3 GndX Denotes Package TypeYY Denotes Threshold VoltageTZ Denotes Taping TypeVref3 Gndhttp://onsemi.com128

Supervisory Circuits (continued)Micropower Undervoltage Sensing Circuits withProgrammable Output DelayMC33465NTA = –30° to +80°C, SOT–23 5 LeadsThe MC33465 series are micropower undervoltagesensing circuits that are specifically designed for use withbattery powered microprocessor based systems, whereextended battery life is required. A choice of severalthreshold voltages from 0.9 V to 4.5 V are available. Thisdevice features a very low quiescent bias current of 1.0µA typical.The MC33465 series features a highly accuratevoltage reference, a comparator with precise thresholdsand built–in hysteresis to prevent erratic reset operation,a choice of output configurations between open drain orcomplementary, a time delayed output, which can beprogrammed by the system designer, and guaranteedoperation below 1.0 V with extremely low standbycurrent. This device is available in a SOT–23 5–pinsurface mount package.SMPSRMApplications include direct monitoring of theMPU/logic power supply used in appliance, automotive,industrial and portable equipment.MC33465 Features:• Extremely Low Standby Current of 1.0 µA at Vin =3.5 V• Wide Input Voltage Range (0.7 V to 10 V)• Monitors Power Supply Voltages from 1.1 V to 5.0 V• High Accuracy Detector Threshold (±2.5%)• Two Reset Output Types (Open Drain orComplementary Drive)• Programmable Output Delay by External Capacitor(100 ms typ. with 0.15 µF)• Surface Mount Package (SOT–23 5–Pin)• Convenient Tape and Reel (3000 per Reel)DeviceORDERING INFORMATIONThresholdVoltageMC33465N–09ATR 0.9MC33465N–20ATR 2.0MC33465N–27ATR 2.7MC33465N–30ATR3.0MC33465N–32ATR3.2MC33465N–45ATR 4.5MC33465N–09CTR 0.9MC33465N–20CTR 2.0MC33465N–27CTR 2.7MC33465N–30CTRMC33465N–43CTR3.04.3MC33465N–45CTR 4.5TypeOpenDrainResetCompl.MOSResetOperatingTemperature RangeTA = –30° to +80°COther voltages from 0.9 to 6.0 V, in 0.1 V increments, are available. Consult factory for information.PackageSOT–235 LeadsMC33465N–YYATROpen Drain Output ConfigurationMC33465N–YYCTRComplementary Output Configuration2 Input1 Reset2 InputRDRD1VrefVrefReset3 Gnd 5 CDYY Denotes Threshold Voltage3 Gnd 5 CDhttp://onsemi.com129

SMPSRMSupervisory Circuits (continued)Undervoltage Sensing CircuitMC34064P–5, D–5, DM–5TA = 0° to +70°C, TO–92, SO–8MC33064P–5, D–5, DM–5TA = –40° to +85°C, TO–92, SO–8MC34164P–3, P–5, D–3, D–5, DM–3, DM–5TA = 0° to +70°C, TO–92, SO–8MC33164P–3, P–5, D–3, D–5, DM–3, DM–5TA = –40° to +85°C, TO–92, SO–8The MC34064 and MC34164 are two families ofundervoltage sensing circuits specifically designed for useas reset controllers in microprocessor–based systems.They offer the designer an economical solution for lowvoltage detection with a single external resistor. Both partsfeature a trimmed bandgap reference, and a comparatorwith precise thresholds and built–in hysteresis to preventerratic reset operation.The two families of undervoltage sensing circuits takentogether, cover the needs of the most commonly specifiedpower supplies used in MCU/MPU systems. Keyparameter specifications of the MC34164 family werechosen to complement the MC34064 series. The tablesummarizes critical parameters of both families. TheMC34064 fulfills the needs of a 5.0 V ± 5% system andfeatures a tighter hysteresis specification. The MC34164series covers 5.0 V ± 10% and 3.0 V ± 5% power supplieswith significantly lower power consumption, makingthem ideal for applications where extended battery life isrequired such as consumer products or hand heldequipment.Applications include direct monitoring of the 5.0 VMPU/ logic power supply used in appliance, automotive,consumer, and industrial equipment.The MC34164 is specifically designed for batterypowered applications where low bias current (1/25th ofthe MC34064’s) is an important characteristic.Input2 (2)1.2 Vref3 (4)GndReset1 (1)Pin numbers inparenthesisare for theD suffix package.Table 1. Undervoltage Sense/Reset Controller FeaturesMC34X64 devices are specified to operate from 0° to +70°C, and MC33X64 devices operate from –40° to +85°C.DeviceStandardPowerSupplySupportedTypicalThresholdVoltage(V)TypicalHysteresisVoltage(V)MinimumOutputSinkCurrent(mA)PowerSupplyInputVoltageRange (V)MaximumQuiescentInputCurrentMC34064/MC33064 5.0 V ± 5% 4.6 0.02 10 1.0 to 10 500 µA@Vin = 5.0 VPackageTO–92SO–8MC34164/MC33164 5.0 V ± 10% 4.3 0.09 7.0 1.0 to 12 20 µA@Vin = 5.0 VMC34164/MC33164 3.0 V ± 5% 2.7 0.06 6.0 1.0 to 12 15 µA@Vin = 3.0 VTO–92SO–8TO–92SO–8http://onsemi.com130

SMPSRMSupervisory Circuits (continued)Universal Voltage MonitorMC34161P, DTA = 0° to +70°C, DIP–8, SO–8MC33161P, DTA = –40° to +85°C, Case 626, 751The MC34161, MC33161 series are universal voltagemonitors intended for use in a wide variety of voltagesensing applications. These devices offer the circuit designeran economical solution for positive and negativevoltage detection. The circuit consists of two comparatorchannels each with hysteresis, a unique Mode Select Inputfor channel programming, a pinned out 2.54 V reference,and two open collector outputs capable of sinkingin excess of 10 mA. Each comparator channel can beconfigured as either inverting or noninverting by theMode Select Input. This allows over, under, and windowdetection of positive and negative voltages. The minimumsupply voltage needed for these devices to be fullyfunctional is 2.0 V for positive voltage sensing and 4.0 Vfor negative voltage sensing.Applications include direct monitoring of positiveand negative voltages used in appliance, automotive,consumer, and industrial equipment.• Unique Mode Select Input Allows ChannelProgramming• Over, Under, and Window Voltage Detection• Positive and Negative Voltage Detection• Fully Functional at 2.0 V for Positive VoltageSensing and 4.0 V for Negative Voltage Sensing• Pinned Out 2.54 V Reference with Current LimitProtection• Low Standby Current• Open Collector Outputs for Enhanced Device FlexibilityVref1ModeSelect 7Input 12Input 231.27 V1.27 VGndVCC82.54 VReference2.8 V0.6 V4Channel 1Channel 2Output 16Output 25Mode SelectPin 7Input 1Pin 2GND 01Vref 01VCC (>2.0 V) 01Output 1Pin 6010110TRUTH TABLEInput 2Pin 3010101Output 2Pin 5011010CommentsChannels 1 & 2: NoninvertingChannel 1: NoninvertingChannel 2: InvertingChannels 1 & 2: InvertingPOSITIVE AND NEGATIVE OVERVOLTAGE DETECTORVCC8Input VS2V4V3VHys212.54 VReferenceInput –VS1OutputVoltagePins 5, 6GndV1V2VCCGndVHys1LED “On”–VS1VS2R4R3R2R1723+++–1.27 V+–1.27 V+++ –2.8 V+ –0.6 V654http://onsemi.com131

SMPSRMSupervisory Circuits (continued)3–Pin Microprocessor Reset MonitorsMAX809/810TA = –40° to +85°C, SOT–23The MAX809 and MAX810 are cost–effectivesystem supervisor circuits designed to monitor V CC indigital systems and provide a reset signal to the hostprocessor when necessary. No external components arerequired.The reset output is driven active within 20 µsec of V CCfalling through the reset voltage threshold. Reset ismaintained active for a minimum of 140msec after V CCrises above the reset threshold. The MAX810 has anactive–high RESET output while the MAX809 has anactive–low RESET output. The output of the MAX809is guaranteed valid down to V CC = 1V. Both devices areavailable in a SOT–23 package.The MAX809/810 are optimized to reject fasttransient glitches on the V CC line. Low supply current of17µA (V CC = 3.3V) makes these devices suitable forbattery powered applications.MAX809/810 Features:• Precision V CC Monitor for 3.0V, 3.3V, and 5.0VSupplies• 140msec Guaranteed Minimum RESET, RESETOutput Duration• RESET Output Guaranteed to V CC = 1.0V(MAX809)• Low 17µA Supply Current• V CC Transient Immunity• Small SOT–23 Package• No External Components• Wide Operating Temperature: –40°C to 85°CApplications:• Computers• Embedded Systems• Battery Powered Equipment• Critical µP Power Supply MonitoringORDERING INFORMATIONMAX809MAX810DeviceOperatingTemperature RangeTA = –40° to +85°CPackageSOT–23Typical Application DiagramVCCVCCMAX809RESETVCCPROCESSORRESETINPUTGNDGNDhttp://onsemi.com132

SMPSRMSupervisory Circuits (continued)Under Voltage Detector SeriesMC33460/MC33461TA = –40° to +85°C, SC–82ABThe MC33460 and MC33461 series are ultra–lowpower CMOS under–voltage detectors with very tightthreshold accuracy specifically designed for accuratemonitoring of power supplies. The devices are optimizedfor use in battery powered systems where low quiescentcurrent and small packaging are required. The devicegenerates an active–low signal whenever the inputvoltage falls below the factory set ±2% threshold.Hysteresis is provided to ensure reliable outputswitching.The MC33460/1 series features a highly accuratevoltage reference, a comparator with a precision voltagethreshold, and built–in hysteresis to prevent erraticoperation and a choice of output configurations betweenOpen Drain (MC33460) and complementary push–pull(MC33461). The products are offered in 9 standardvoltage thresholds ranging from 0.9V to 4.5V. Otherthreshold voltages from 1.0 to 5.0V are available in100mV steps. The devices can operate to a very low inputvoltage level and are housed in the ultra–miniatureSC–82AB package.MC33460/1 Features:• Available in Open Drain or Push–Pull Output• Output State Guaranteed to Vin = 0.8 V• Tight Detector Voltage Accuracy (±2.0%)• Extended Temperature Operation (–40°C to 85°C)• Ultra Low Quiescent Current (0.8 µA at Vin = 1.5 Vtypical)• Wide Range of Operating Voltage (0.7 V to 10 V)Applications:• Low Battery Detector• Power–Fail Indicator• Microprocessor Reset Generator• Window Comparator• Battery Backup CircuitMC33460MC33461DeviceORDERING INFORMATIONOperatingTemperature RangeTA = –40° to +85°CPackageSC–82ABRepresentative Block DiagramsMC33460Nch Open Drain ConfigurationMC33461CMOS ConfigurationVinOUTVinOUTVrefVrefGNDGNDhttp://onsemi.com133

SMPSRMSystem ManagementIn Brief . . .Power supplies, MCU–based systems, industrial controls,computer systems and many other products, portableor not, are requiring system management functions whichmonitor voltages to ensure proper system operation.These circuits monitor critical circuit conditions andreport any violations of prescribed limits to a microprocessor.The microprocessor will then take appropriate actionsuch as storing data before executing a graceful shutdown.ON Semiconductor offers a wide variety of voltagesupervisory circuits (Undervoltage or Overvoltage)designed for use where precise voltage limits or windowsare required for reliable system operation.Newer supervisory circuits have utilized CMOStechnology and miniature surface mount packages(SOT23–5 leads) to reduce the current consumption andthe PCB board area. This makes them particularly suitedfor battery–powered applications.PageSupervisory Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . 135Overvoltage Crowbar Sensing Circuit . . . . . . . . . 135Over/Undervoltage Protection Circuit . . . . . . . . . 136Micropower Undervoltage Sensing Circuits . . . . 137Micropower Undervoltage Sensing Circuitswith Programmable Output Delay . . . . . . . . . . . . 138Undervoltage Sensing Circuit . . . . . . . . . . . . . . . . 139Universal Voltage Monitor . . . . . . . . . . . . . . . . . . . 1403–Pin Microprocessor Reset Monitors . . . . . . . . 141ANALOG INTEGRATED CIRCUITSSIGNALCONDITIONINGBATTERYMANAGEMENTPOWERMANAGEMENTSYSTEMMANAGEMENTMOTORCONTROLINTERFACEOTHERCIRCUITSOp–AmpsComparatorsLithiumBatteryProtectionICsChargeControllersDC–DCConverterswith InductorOff–LineSMPSControllersPower FactorControllersUndervoltageSupervisoryOvervoltageSupervisoryDC MotorControlDataTransmissionDisplayDriversTimersLinear Four–QuadrantMultiplierVoltageReferencesLinear VoltageRegulatorsLDO LinearVoltageRegulatorsMOSFET/IGBT DriversDedicatedDriversDedicated PowerMgmnt Controllershttp://onsemi.com134

Supervisory CircuitsA variety of Power Supervisory Circuits are offered.Overvoltage sensing circuits which drive ‘‘Crowbar’’SCRs are provided in several configurations from a lowcost three–terminal version to 8–pin devices whichSMPSRMprovide pin–programmable trip voltages or additionalfeatures, such as an indicator output drive and remoteactivation capability. An over/undervoltage protectioncircuit is also offered.Overvoltage Crowbar Sensing CircuitMC3423P1, DTA = 0° to +70°C, DIP–8, SO–8 PackagesThis device can protect sensitive circuitry frompower supply transients or regulator failure when usedwith an external ‘‘Crowbar’’ SCR. The device sensesvoltage and compares it to an internal 2.6 V reference.Overvoltage trip is adjustable by means of an externalresistive voltage divider. A minimum duration beforetrip is programmable with an external capacitor. Otherfeatures include a 300 mA high current output for drivingthe gate of a ‘‘Crowbar’’ SCR, an open–collectorindicator output and remote activation capability.VCC1200 µA42CurrentSourceSense 1Vref2.6 V8Output7VEE Sense 235RemoteActivation6IndicatorOutputhttp://onsemi.com135

SMPSRMOver/Undervoltage Protection CircuitMC3425P1TA = 0° to +70°C, DIP–8 PackageThe MC3425 is a power supply supervisory circuitcontaining all the necessary functions required tomonitor over and undervoltage fault conditions. Thisdevice features dedicated over and undervoltagesensing channels with independently programmabletime delays. The overvoltage channel has a high currentdrive output for use in conjunction with an external SCR‘‘Crowbar’’ for shutdown. The undervoltage channelinput comparator has hysteresis which is externallyprogrammable, and an open–collector output for faultindication.VCC8OVSense200 µA3UVSense200 µAOVDrive16UVIndicator4IH2.5 VVref12.5 µAInput Section5 2 7 GndUV OV Output SectionDLY DLYhttp://onsemi.com136

Supervisory Circuits (continued)Micropower Undervoltage Sensing CircuitsMC33464H, NTA = –30° to +80°C, SOT–89, SOT–23 5 Leads PackagesThe MC33464 series are micropower undervoltagesensing circuits that are specifically designed for usewith battery powered microprocessor based systems,where extended battery life is required. A choice of severalthreshold voltages from 0.9 V to 4.5 V are available.These devices feature a very low quiescent bias currentof 0.8 µA typical.The MC33464 series features a highly accuratevoltage reference, a comparator with precise thresholdsand built–in hysteresis to prevent erratic reset operation,a choice of output configurations between open drain orcomplementary MOS, and guaranteed operation below1.0 V with extremely low standby current. Thesedevices are available in either SOT–89 3–pin orDeviceORDERING INFORMATIONThresholdVoltageTypeSMPSRMSOT–23 5–pin surface mount packages.Applications include direct monitoring of theMPU/logic power supply used in portable, appliance,automotive and industrial equipment.MC33464 Features:• Extremely Low Standby Current of 0.8 µA at Vin =1.5 V• Wide Input Voltage Range (0.7 V to 10 V)• Monitors Power Supply Voltages from 1.1 V to 5.0 V• High Accuracy Detector Threshold (±2.5%)• Two Reset Output Types (Open Drain orComplementary Drive)• Two Surface Mount Packages (SOT–89 or SOT–235–Pin)OperatingTemperature RangePackage(Qty/Reel)MC33464H–09AT1 0.9MC33464H–20AT1 2.0 OpenMC33464H–27AT1 2.7 DrainMC33464H–30AT1 3.0 ResetMC33464H–45AT1 4.5 SOT–89MC33464H–09CT1 0.9 (1000)MC33464H–20CT1 2.0 Compl.MC33464H–27CT1 2.7 MOSMC33464H–30CT1 3.0 ResetMC33464H–45CT1 4.5MC33464N–09ATR 0.9 TA = –30° to +80°CMC33464N–20ATR2.0OpenMC33464N–21ATR2.1DrainMC33464N–27ATR 2.7MC33464N–30ATR 3.0ResetSOT–23MC33464N–45ATR 4.5 (3000)MC33464N–09CTR 0.95 LeadsMC33464N–20CTR 2.0 Compl.MC33464N–27CTR 2.7 MOSMC33464N–30CTR 3.0 ResetMC33464N–45CTR 4.5Other voltages from 0.9 to 6.0 V, in 0.1 V increments, are available. Consult factory for information.MC33464X–YYATZ Open Drain Configuration2 Input1ResetMC33464X–YYCTZ Complementary Drive Configuration2 Input1ResetVref3 GndX Denotes Package TypeYY Denotes Threshold VoltageTZ Denotes Taping TypeVref3 Gndhttp://onsemi.com137

SMPSRMSupervisory Circuits (continued)Micropower Undervoltage Sensing Circuits withProgrammable Output DelayMC33465NTA = –30° to +80°C, SOT–23 5 LeadsThe MC33465 series are micropower undervoltagesensing circuits that are specifically designed for usewith battery powered microprocessor based systems,where extended battery life is required. A choice ofseveral threshold voltages from 0.9 V to 4.5 V areavailable. This device features a very low quiescent biascurrent of 1.0 µA typical.The MC33465 series features a highly accuratevoltage reference, a comparator with precise thresholdsand built–in hysteresis to prevent erratic reset operation,a choice of output configurations between open drain orcomplementary, a time delayed output, which can beprogrammed by the system designer, and guaranteedoperation below 1.0 V with extremely low standbycurrent. This device is available in a SOT–23 5–pinsurface mount package.Applications include direct monitoring of theMPU/logic power supply used in appliance, automotive,industrial and portable equipment.MC33465 Features:• Extremely Low Standby Current of 1.0 µA at Vin =3.5 V• Wide Input Voltage Range (0.7 V to 10 V)• Monitors Power Supply Voltages from 1.1 V to 5.0 V• High Accuracy Detector Threshold (±2.5%)• Two Reset Output Types (Open Drain orComplementary Drive)• Programmable Output Delay by External Capacitor(100 ms typ. with 0.15 µF)• Surface Mount Package (SOT–23 5–Pin)• Convenient Tape and Reel (3000 per Reel)DeviceORDERING INFORMATIONThresholdVoltageMC33465N–09ATR 0.9MC33465N–20ATR 2.0MC33465N–27ATR 2.7MC33465N–30ATR3.0MC33465N–32ATR3.2MC33465N–45ATR 4.5MC33465N–09CTR 0.9MC33465N–20CTR 2.0MC33465N–27CTR 2.7MC33465N–30CTRMC33465N–43CTR3.04.3MC33465N–45CTR 4.5TypeOpenDrainResetCompl.MOSResetOperatingTemperature RangeTA = –30° to +80°COther voltages from 0.9 to 6.0 V, in 0.1 V increments, are available. Consult factory for information.PackageSOT–235 LeadsMC33465N–YYATROpen Drain Output ConfigurationMC33465N–YYCTRComplementary Output Configuration2 Input1 Reset2 InputRDRD1VrefVrefReset3 Gnd 5 CDYY Denotes Threshold Voltage3 Gnd 5 CDhttp://onsemi.com138

SMPSRMSupervisory Circuits (continued)Undervoltage Sensing CircuitMC34064P–5, D–5, DM–5TA = 0° to +70°C, TO–92, SO–8MC33064P–5, D–5, DM–5TA = –40° to +85°C, TO–92, SO–8MC34164P–3, P–5, D–3, D–5, DM–3, DM–5TA = 0° to +70°C, TO–92, SO–8MC33164P–3, P–5, D–3, D–5, DM–3, DM–5TA = –40° to +85°C, TO–92, SO–8The MC34064 and MC34164 are two families ofundervoltage sensing circuits specifically designed foruse as reset controllers in microprocessor–based systems.They offer the designer an economical solution forlow voltage detection with a single external resistor.Both parts feature a trimmed bandgap reference, and acomparator with precise thresholds and built–in hysteresisto prevent erratic reset operation.The two families of undervoltage sensing circuitstaken together, cover the needs of the most commonlyspecified power supplies used in MCU/MPU systems.Key parameter specifications of the MC34164 familywere chosen to complement the MC34064 series. Thetable summarizes critical parameters of both families.The MC34064 fulfills the needs of a 5.0 V ± 5% systemand features a tighter hysteresis specification. TheMC34164 series covers 5.0 V ± 10% and 3.0 V ± 5%power supplies with significantly lower power consumption,making them ideal for applications whereextended battery life is required such as consumer productsor hand held equipment.Applications include direct monitoring of the 5.0 VMPU/ logic power supply used in appliance, automotive,consumer, and industrial equipment.The MC34164 is specifically designed for batterypowered applications where low bias current (1/25th ofthe MC34064’s) is an important characteristic.Input2 (2)1.2 Vref3 (4)GndReset1 (1)Pin numbers inparenthesisare for theD suffix package.Table 1. Undervoltage Sense/Reset Controller FeaturesMC34X64 devices are specified to operate from 0° to +70°C, and MC33X64 devices operate from –40° to +85°C.DeviceStandardPowerSupplySupportedTypicalThresholdVoltage(V)TypicalHysteresisVoltage(V)MinimumOutputSinkCurrent(mA)PowerSupplyInputVoltageRange (V)MaximumQuiescentInputCurrentMC34064/MC33064 5.0 V ± 5% 4.6 0.02 10 1.0 to 10 500 µA@Vin = 5.0 VPackageTO–92SO–8MC34164/MC33164 5.0 V ± 10% 4.3 0.09 7.0 1.0 to 12 20 µA@Vin = 5.0 VMC34164/MC33164 3.0 V ± 5% 2.7 0.06 6.0 1.0 to 12 15 µA@Vin = 3.0 VTO–92SO–8TO–92SO–8http://onsemi.com139

SMPSRMSupervisory Circuits (continued)Universal Voltage MonitorMC34161P, DTA = 0° to +70°C, DIP–8, SO–8MC33161P, DTA = –40° to +85°C, Case 626, 751The MC34161, MC33161 series are universal voltagemonitors intended for use in a wide variety of voltagesensing applications. These devices offer the circuitdesigner an economical solution for positive and negativevoltage detection. The circuit consists of two comparatorchannels each with hysteresis, a unique ModeSelect Input for channel programming, a pinned out2.54 V reference, and two open collector outputs capableof sinking in excess of 10 mA. Each comparatorchannel can be configured as either inverting or noninvertingby the Mode Select Input. This allows over,under, and window detection of positive and negativevoltages. The minimum supply voltage needed for thesedevices to be fully functional is 2.0 V for positive voltagesensing and 4.0 V for negative voltage sensing.Applications include direct monitoring of positiveand negative voltages used in appliance, automotive,consumer, and industrial equipment.• Unique Mode Select Input Allows ChannelProgramming• Over, Under, and Window Voltage Detection• Positive and Negative Voltage Detection• Fully Functional at 2.0 V for Positive VoltageSensing and 4.0 V for Negative Voltage Sensing• Pinned Out 2.54 V Reference with Current LimitProtection• Low Standby Current• Open Collector Outputs for Enhanced DeviceFlexibilityVref1ModeSelect 7Input 12Input 231.27V1.27VGndVCC82.54 VReference2.8V0.6V4Channel 1Channel 2Output 16Output 25Mode SelectPin 7Input 1Pin 2GND 01Vref 01VCC (>2.0 V) 01Output 1Pin 6010110TRUTH TABLEInput 2Pin 3010101Output 2Pin 5011010CommentsChannels 1 & 2: NoninvertingChannel 1: NoninvertingChannel 2: InvertingChannels 1 & 2: InvertingPOSITIVE AND NEGATIVE OVERVOLTAGE DETECTORVCC8Input VS2V4V3VHys212.54 VReferenceInput –VS1OutputVoltagePins 5, 6GndV1V2VCCGndVHys1LED “On”–VS1VS2R4R3R2R1723+++–1.27 V+–1.27 V+++ –2.8 V+ –0.6 V654http://onsemi.com140

Supervisory Circuits (continued)3–Pin Microprocessor Reset MonitorsMAX809/810TA = –40° to +85°C, SOT–23The MAX809 and MAX810 are cost–effectivesystem supervisor circuits designed to monitor V CC indigital systems and provide a reset signal to the hostprocessor when necessary. No external components arerequired.The reset output is driven active within 20 µsec ofV CC falling through the reset voltage threshold. Reset ismaintained active for a minimum of 140msec after V CCrises above the reset threshold. The MAX810 has anactive–high RESET output while the MAX809 has anactive–low RESET output. The output of the MAX809is guaranteed valid down to V CC = 1V. Both devices areavailable in a SOT–23 package.The MAX809/810 are optimized to reject fasttransient glitches on the V CC line. Low supply current of17µA (V CC = 3.3V) makes these devices suitable forbattery powered applications.SMPSRMMAX809/810 Features:• Precision V CC Monitor for 3.0V, 3.3V, and 5.0VSupplies• 140msec Guaranteed Minimum RESET, RESETOutput Duration• RESET Output Guaranteed to V CC = 1.0V(MAX809)• Low 17µA Supply Current• V CC Transient Immunity• Small SOT–23 Package• No External Components• Wide Operating Temperature: –40°C to 85°CApplications:• Computers• Embedded Systems• Battery Powered Equipment• Critical µP Power Supply MonitoringORDERING INFORMATIONMAX809MAX810DeviceOperatingTemperature RangeTA = –40° to +85°CPackageSOT–23Typical Application DiagramVCCVCCMAX809RESETVCCPROCESSORRESETINPUTGNDGNDhttp://onsemi.com141

SMPSRMON SEMICONDUCTOR MAJOR WORLDWIDE SALES OFFICESUNITED STATESALABAMAHuntsville . . . . . . . . . . . . . . . (256)464–6800CALIFORNIAIrvine . . . . . . . . . . . . . . . . . . . (949)753–7360San Jose . . . . . . . . . . . . . . . (408)749–0510COLORADOLittleton . . . . . . . . . . . . . . . . . (303)256–5884FLORIDATampa . . . . . . . . . . . . . . . . . . (813)286–6181GEORGIAAtlanta . . . . . . . . . . . . . . . . . (770)338–3810ILLINOISChicago . . . . . . . . . . . . . . . . (847)413–2500MASSACHUSETTSBoston . . . . . . . . . . . . . . . . . (781)932–9700MICHIGANDetroit . . . . . . . . . . . . . . . . . . (248)347–6800MINNESOTAPlymouth . . . . . . . . . . . . . . . (612)249–2360NORTH CAROLINARaleigh . . . . . . . . . . . . . . . . . (919)870–4355PENNSYLVANIAPhiladelphia/Horsham . . . . (215)957–4100TEXASDallas . . . . . . . . . . . . . . . . . . (972)516–5100CANADAONTARIOOttawa . . . . . . . . . . . . . . . . . (613)226–3491QUEBECMontreal . . . . . . . . . . . . . . . . (514)333–3300INTERNATIONALBRAZILSao Paulo . . . . . . . . . . . 55(011)3030–5244CHINABeijing . . . . . . . . . . . . . . . . 86–10–65642288Guangzhou . . . . . . . . . . . 86–20–87537888Shanghai . . . . . . . . . . . . . 86–21–63747668FRANCEParis . . . . . . . . . . . . . . . . . . . . 33134 635900GERMANYMunich . . . . . . . . . . . . . . . . . 49 89 92103–0HONG KONGHong Kong . . . . . . . . . . . . 852–2–610–6888INDIABangalore . . . . . . . . . . . . . . 91–80–5598615ISRAELTel Aviv . . . . . . . . . . . . . . . . 972–9–9522333ITALYMilan . . . . . . . . . . . . . . . . . . . . . 39(02)82201JAPANTokyo . . . . . . . . . . . . . . . . 81–3–5487–8345INTERNATIONAL (continued)KOREASeoul . . . . . . . . . . . . . . . . . 82–2–3440–7200MALAYSIAPenang . . . . . . . . . . . . . . . . . 60(4)228–2514MEXICOGuadalajara . . . . . . . . . . . . . 52(36)78–0750PHILIPPINESManila . . . . . . . . . . . . . . . . . . (63)2 807–8455PUERTO RICOSan Juan . . . . . . . . . . . . . . . (787)641–4100SINGAPORESingapore . . . . . . . . . . . . . . . . . (65)4818188SPAINMadrid . . . . . . . . . . . . . . . . . . 34(1)457–8204or . . . . . . . . . . . . . . . . . . . . . . 34(1)457–8254SWEDENStockholm . . . . . . . . . . . . . . 46(8)734–8800TAIWANTaipei . . . . . . . . . . . . . . . . . 886(2)27058000THAILANDBangkok . . . . . . . . . . . . . . . . 66(2)254–4910UNITED KINGDOMAylesbury . . . . . . . . . . . . . 44 1 (296)395252http://onsemi.com142

SMPSRMON SEMICONDUCTOR STANDARD DOCUMENT TYPE DEFINITIONSDATA SHEET CLASSIFICATIONSA Data Sheet is the fundamental publication for each individual product/device, or series of products/devices, containing detailed parametricinformation and any other key information needed in using, designing–in or purchasing of the product(s)/device(s) it describes. Below are the threeclassifications of Data Sheet: Product Preview; Advance Information; and Fully Released Technical DataPRODUCT PREVIEWA Product Preview is a summary document for a product/device under consideration or in the early stages of development. The ProductPreview exists only until an “Advance Information” document is published that replaces it. The Product Preview is often used as the first sectionor chapter in a corresponding reference manual. The Product Preview displays the following disclaimer at the bottom of the first page: “ONSemiconductor reserves the right to change or discontinue this product without notice.”ADVANCE INFORMATIONThe Advance Information document is for a device that is NOT fully qualified, but is in the final stages of the release process, and for whichproduction is eminent. While the commitment has been made to produce the device, final characterization and qualification may not be complete.The Advance Information document is replaced with the “Fully Released Technical Data” document once the device/part becomes fully qualified.The Advance Information document displays the following disclaimer at the bottom of the first page: “This document contains information ona new product. Specifications and information herein are subject to change without notice.”FULLY RELEASED TECHNICAL DATAThe Fully Released Technical Data document is for a product/device that is in full production (i.e., fully released). It replaces the AdvanceInformation document and represents a part that is fully qualified. The Fully Released Technical Data document is virtually the same documentas the Product Preview and the Advance Information document with the exception that it provides information that is unavailable for a productin the early phases of development, such as complete parametric characterization data. The Fully Released Technical Data document is also a morecomprehensive document than either of its earlier incarnations. This document displays no disclaimer, and while it may be informally referredto as a “data sheet,” it is not labeled as such.DATA BOOKA Data Book is a publication that contains primarily a collection of Data Sheets, general family and/or parametric information, Application Notesand any other information needed as reference or support material for the Data Sheets. It may also contain cross reference or selector guide information,detailed quality and reliability information, packaging and case outline information, etc.APPLICATION NOTEAn Application Note is a document that contains real–world application information about how a specific ON Semiconductor device/product isused, or information that is pertinent to its use. It is designed to address a particular technical issue. Parts and/or software must already exist and beavailable.SELECTOR GUIDEA Selector Guide is a document published, generally at set intervals, that contains key line–item, device–specific information for particularproducts or families. The Selector Guide is designed to be a quick reference tool that will assist a customer in determining the availability of a particulardevice, along with its key parameters and available packaging options. In essence, it allows a customer to quickly “select” a device. For detailed designand parametric information, the customer would then refer to the device’s Data Sheet. The Master Components Selector Guide (SG388/D) is a listingof ALL currently available ON Semiconductor devices.REFERENCE MANUALA Reference Manual is a publication that contains a comprehensive system or device–specific descriptions of the structure and function(operation) of a particular part/system; used overwhelmingly to describe the functionality or application of a device, series of devices or devicecategory. Procedural information in a Reference Manual is limited to less than 40 percent (usually much less).HANDBOOKA Handbook is a publication that contains a collection of information on almost any give subject which does not fall into the Reference Manualdefinition. The subject matter can consist of information ranging from a device specific design information, to system design, to quality and reliabilityinformation.ADDENDUMA documentation Addendum is a supplemental publication that contains missing information or replaces preliminary information in the primarypublication it supports. Individual addendum items are published cumulatively. The Addendum is destroyed upon the next revision of the primarydocument.http://onsemi.com143

ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without furthernotice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor doesSCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitationspecial, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in differentapplications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application bycustomer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, orauthorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any otherapplication in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLCproducts for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, anddistributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personalinjury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture ofthe part. SCILLC is an Equal Opportunity/Affirmative Action Employer.PUBLICATION ORDERING INFORMATIONNORTH AMERICA Literature Fulfillment:Literature Distribution Center for ON SemiconductorP.O. Box 5163, Denver, Colorado 80217 USAPhone: 303-675-2175 or 800-344-3860 Toll Free USA/CanadaFax: 303-675-2176 or 800-344-3867 Toll Free USA/CanadaEmail: ONlit@hibbertco.comFax Response Line: 303-675-2167 or 800-344-3810 Toll Free USA/CanadaN. American Technical Support: 800-282-9855 Toll Free USA/CanadaEUROPE: LDC for ON Semiconductor - European SupportGerman Phone: (+1) 303-308-7140 (M-F 1:00pm to 5:00pm Munich Time)Email: ONlit-german@hibbertco.comFrench Phone: (+1) 303-308-7141 (M-F 1:00pm to 5:00pm Toulouse Time)Email: ONlit-french@hibbertco.comEnglish Phone: (+1) 303-308-7142 (M-F 12:00pm to 5:00pm UK Time)Email: ONlit@hibbertco.comEUROPEAN TOLL-FREE ACCESS*: 00-800-4422-3781*Available from Germany, France, Italy, England, IrelandCENTRAL/SOUTH AMERICA:Spanish Phone: 303-308-7143 (Mon-Fri 8:00am to 5:00pm MST)Email: ONlit-spanish@hibbertco.comASIA/PACIFIC: LDC for ON Semiconductor - Asia SupportPhone: 303-675-2121 (T-F 9:00am to 1:00pm Hong Kong Time)Toll Free from Hong Kong & Singapore:001-800-4422-3781Email: ONlit-asia@hibbertco.comJAPAN: ON Semiconductor, Japan Customer Focus Center4-32-1 Nishi-Gotanda, Shinagawa-ku, Tokyo, Japan 141-8549Phone: 81-3-5740-2745Email: r14525@onsemi.comON Semiconductor Website: http://onsemi.comFor additional information, please contact your local SalesRepresentativeSMPSRM/D