The AS1322B is a synchronous, fixed frequency, very high-efficiency DC-DC boost converter capable of supplying 3.3V at 150mA from a single AAsupply.
Compact size and minimum external parts requirements make this device perfect for modern portable devices.
High-speed switching frequency (1.2MHz) and internally compensated PWM current mode design provide highlyreliable DC-DC conversion, especially when driving white LEDs.
The device contains two internal MOSFET switches: one NMOS switch and one PMOS synchronous rectifier.
Anti-ringing control circuitry reduces EMI by damping the inductor in discontinuous mode, and the devices exhibit extremely low quiescent current (< 1μA) in shutdown.
In shutdown mode the battery is connected to the output and VOUT is held at approximately VIN - 0.6V.
The AS1322 is ideal for low-power applications where ultra-small size is critical as in medical diagnostic equipment, hand-held instruments, pagers, digital cameras, remote wireless transmitters, MP3 players, LCD bias supplies, cordless phones, GPS receivers, and PC cards..
The AS1322B-BTTT is offered in a 6-pin TSOT-23 Package with Continuos Switching at Light Loads and a temperature range of -40ºC to +85ºC.