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High Performance Analog IC Portfolio - SE Spezial-Electronic Sp. z o.o

High Performance Analog IC Portfolio - SE Spezial-Electronic Sp. z o.o

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50V, Micropower, DC-DC Step-Up ConverterAS1340POWER MANAGEMENTDC-DC Step-upConvertersMOBILE ENTERTAINMENT AUDIO <strong>SE</strong>NSING INTERFACES LIGHTING MANAGEMENT RF PRODUFCTS / RFID DATA CONVERTERSGeneral DescriptionThe AS1340 step-up converter contains a fully integrated 1.4A switch ina tiny TDFN-8 3x3mm package. The device operates from a 2.7 to 5.5Vsupply, and can boost voltages up to 50V output. The output voltage caneasily be adjusted by an external resistor divider.The AS1340 uses an unique control scheme providing the highesteffi ciency over a wide range of load conditions. An internal 1.4A MOSFETreduces external component count, and a fi xed high switching frequency(1MHz) allows for tiny surface-mount components. The AS1340 alsofeatures power-OK circuitry which monitors the output voltage.Additionally the AS1340 features a low quiescent supply current and ashutdown mode to save power. During shutdown an output disconnectswitch separates the input from the output.The AS1340 is ideal for LCD or OLED panels with low currentrequirements and can also be used in a wide range of other applications.The device is available in a low-profi le TDFN-8 3x3mm package.Block DiagramVIN = 2.7Vto 5.5VCINOnOff2VCC4POK1SHDNN3SWVINAS13406SWOUT14.7μH5LX8FB7, 9GNDR1R2Key Features- 2.7V to 50V Adjustable Output Voltage- 2.7V to 50V Input Voltage Range- 2.7V to 5.5V Supply Voltage Range- <strong>High</strong> Output Currents:· 100mA @ 12V from 3.3V VIN· 50mA @ 24V from 3.3V VIN· 30mA @ 36V from 3.3V VIN- Effi ciency: Up to 90%- Switching Frequency: 1MHz- Output Disconnect- Power-OK Output- Quiescent Current: 30μA- Shutdown Current: 0.1μA- TDFN-8 3x3mm PackageApplicationsThe device is ideal for OLED display power supply, LCD bias generators,mobile/cordless phones, palmtop computers, PDAs and organizers,handy terminals or any other portable, battery-powered device.VOUT = >VIN to 50VCOUTVIN = 2.7Vto 5.5VVIN = 2.7Vto ~VOUTVIN = 2.7Vto 5.5VVCCVCC331L166LXLXVOUTVOUT34www.austriamicrosystems.comRevision 1.01

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