DESCRIPTION

The A7525 is synchronous, fixed frequency, step-up DC/DC converters delivering high efficiency in a 6-lead SOT package. Capable of supplying 3.3V at 100mA from a single AA cell input, the device contain an internal NMOS switch and PMOS synchronous rectifier. A switching frequency of 1.2MHz minimizes solution footprint by allowing the use of tiny, low profile inductors and ceramic capacitors. The current mode PWM design is internally compensated, reducing external parts count. The A7525 features continuous switching at light loads. Anti-ringing control circuitry reduces EMI concerns by damping the inductor in discontinuous mode, and the device features low shutdown current of under 1uA.

The A7525 is available in SOT-26 package.

FEATURES

? High Efficiency: Up to 92

? 1.2MHz Constant Switching Frequency

? 3.3V Output Voltage at IOUT=100mA from a Single AA Cell; 5.0V Output Voltage at IOUT=500mA from one Li battery.

? Low Start-up Voltage: 1.0V

? Integrated main switch and synchronous rectifier. No Schottky Diode Required

? 2.5V to 5V Output Voltage Range

? Automatic Pulse Skipping Mode Operation

? Tiny External Components

? <1μA Shutdown Current

? Anti-ringing Control Reduces EMI

? Available in SOT-26 Package

APPLICATION

? Cellular and Smart Phones

? Microprocessors and DSP Core Supplies

? Wireless and DSL Modems

? MP3 Player

? Digital Still and Video Cameras

? Portable Instruments