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32
L88R05
Low saturation voltage constant-voltage power supply with reset function
Functions and Features
Low saturation voltage regulator: 5 V/1 A
Microcontroller reset signal generation
function
Full complement of protection functions
Low minimum I/O voltage difference (0.5 V
typical)
C, D, and E rank versions with different reset
threshold voltages available
C: VRT = 4.5 V D: VRT = 4.2 V
E: VRT = 3.9 V
The delay time can be set with an external
capacitor
TO220-5H package adopted for easier
mounting and thermal design.
VIN 1
GND 3
L78LR05
Constant-voltage power supply with reset function
Functions and Features
Regulator: 5 V/150 mA
Microcontroller reset signal generation
function (Ranked* by the reset threshold
voltage, VRT)
Battery backup function
Large number of VRT ranks to support a
wide range of microcontrollers
The delay time can be set with an external
capacitor
No reverse current prevention diode
required for battery backup
Wide range of versions with different lead
forms for flexibility in mounting.
The power dissipation can be increased in
the thermal design when double mounting is
used
Cd 2
Cd
0.1µF
Startup
circuit
INPUT
4
+
1µF
6
1.2V
Reference
voltage
START
UP
+
-
Error
amplifier
Vref
RESET
Thermal
protection circuit
+
-
PROTE
CTOR
Error
amp
300Ω
Vo
detector
Overcurrent
control
23.4µA
0.8
0.9
0.8
2.4V
+
-
10kΩ
TO220-5H
10.4max
10.0
0.45
1.7 1.71.7 1.7
6.5
5.0
300Ω
2.7
3.6
15.0
8.8
TP5H
1.5
(5.5)
7.0
0.6
7.5
1 5
(0.65) 1.3 0.5
1
8
4.5
1.3
2.7
4.5
8.4
0.5
17.8
21.3
23.0
5 VOUT 4 RES
2.3
+ OUTPUT
10µF
RESET
Output
7V
7 GND
0.5
1.2
Under development
LA5761/62/63
General-purpose Darlington array
Functions and Features
LA5761: 3V/2A, LA5762: 5V/2A,
LA5763: 12V/2A
Input voltage (VIN): maximum = 45 V
High efficiency
Only 4 external components required
Built-in reference oscillator (60 Hz)
Current limiter circuit
Thermal shutdown circuit
Soft start circuit
Under development
VIN1
Peg.
OSC Reset
Comp.
5SS 3GND
LA5751/52/53
External excitation step-down switching regulators
Functions and Features
LA5751: 3.3V/3A, LA5752: 5V/3A
LA5753: 12V/3A
Input voltage (VIN): maximum = 45 V
High efficiency
Only 4 external components required
Built-in reference oscillator (60 Hz)
Current limiter circuit
Thermal shutdown circuit
Soft start circuit
VIN1
Peg.
5SS 3GND
Amp.
Comp.
Amp.
VREF
OSC Reset
VREF
OCP
OCP
Drive
TDS
Drive
TDS
0.8
0.9
0.8
Power supply ICs
TO220-5H
10.4max
10.0
2.7
3.6
0.45
1.7 1.71.7 1.7
0.8
0.9
0.8
15.0
8.8
2SWOUT
4VCS
4.5
1.3
2.7
4.5
8.4
TO220-5H
10.4max
10.0
2.7
3.6
0.45
1.7 1.71.7 1.7
15.0
8.8
2SWOUT
4VCS
17.8
21.3
23.0
4.5
1.3
2.7
4.5
8.4
17.8
21.3
23.0
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