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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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AS1344 데이터시트(PDF) 1 Page - ams AG |
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AS1344 데이터시트(HTML) 1 Page - ams AG |
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1 / 19 page  AS1344 42V, DC-DC Boost Converter wi th adjustable Softstart www.austriamicrosystems.com Revision 1.05 1 - 19 Datasheet 1 General Description The AS1344 boost converter contains a 1.4A internal switch in a tiny TDFN-10 3x3mm package. The device operates from a 0.9V to 3.6V supply, and can boost volt- ages up to 42V output. The output voltage can easily be adjusted by an external resistor divider. The AS1344 uses a unique control scheme providing the highest efficiency over a wide range of load condi- tions. An internal 1.4A MOSFET reduces external com- ponent count, and a fixed high switching frequency (1MHz) allows for tiny surface-mount components. The AS1344 also features power-OK circuitry which monitors the output voltage. The device also offers a Softstart function which limits the current during startup. The current during startup can be easily adjusted with the value of RV. For RV = 0 Ω, there is no softstart. Additionally the AS1344 features a low quiescent supply current and a shutdown mode to save power. During shutdown an output disconnect switch separates the input from the output. The AS1344 is ideal for LCD or OLED panels with low current requirements and can also be used in a wide range of other applications. The device is available in a low-profile TDFN-10 3x3mm package. 2 Key Features ! 5.5V to 42V Adjustable Output Voltage ! 0.9V to 3.6V Supply Voltage Range ! High Output Current: - 30mA @ 12V VOUT, from 1.5V VCC ! Efficiency: Up to 85% ! Switching Frequency: 1MHz ! Output Disconnect Function ! Softstart Function with adjustable Current Limit ! Output Discharge Function ! Power-OK Output ! Quiescent Current: 22µA ! Shutdown Current: 0.1µA ! TDFN-10 3x3mm Package 3 Applications The device is ideal for OLED display power supply, LCD bias generators, mobile/cordless phones, palmtop com- puters, PDAs and organizers, handy terminals, driving LEDs or any other portable, battery-powered device. Figure 1. AS1344 - Typical Application Diagram L1 VCC = 0.9V to 3.6V R3 EN VCC FB POK LX On Off R2 R1 VOUT = 5.5V to 42V CIN COUT GND VOUT AS1344 SWOUT PGND D1 VIN RV VCC GND |
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