1.2-MHz Boost Converter Operates From A Single Cell

Oct. 8, 2008
Delivering up to 150 mA of output current at 3.3V, the AS1322 synchronous, step-up dc/dc converter in a 6-pin TSOT package derives power from a single AA cell and provides output voltages from 2.5 to 5V from an input voltage between 0.85V and

Delivering up to 150 mA of output current at 3.3V, the AS1322 synchronous, step-up dc/dc converter in a 6-pin TSOT package derives power from a single AA cell and provides output voltages from 2.5 to 5V from an input voltage between 0.85V and 5.5V. The device's 1.2-MHz switching frequency minimizes PCB space by allowing the use of low-profile inductors and ceramic capacitors. It is available in two versions: the lower-power AS1322A and fixed frequency AS1322B. The AS1322A offers an automatic power-save function in cases of light loads, reducing consumption down to 30 µA. Anti-ringing circuitry reduces EMI by damping the inductor in discontinuous mode. The AS1322B maintains fixed-frequency operation at lighter loads, making it suitable for applications requiring predictable and easy to filter output noise, i.e., mobile communications. AUSTRIAMICROSYSTEMS USA INC., Raleigh, NC. (919) 676-5292.

Company: AUSTRIAMICROSYSTEMS USA INC.

Product URL: Click here for more information

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