[Champion]

GENERAL DESCRIPTION

The CM3708A is a low-noise, pulse-width-modulated (PWM), DC-DC step-down converter. It powers logic and transmitters in small wireless systems such as cellular phones, communicating PDAs, and handy-terminals. The device features an internal synchronous rectifier for high efficiency; it requires no external Schottky diode. Excellent noise characteristics and fixed-frequency operation provide easy post-filtering. The CM3708A is ideally suited for Li-lon battery applications. It is also useful for +3V or +5V fixed input applications.

FEATURES

♦ Patent Filed #6,452,366

♦ 600KHz switching and synchronization

♦ Dynamic output-voltage adjustment from VREF to VIN

♦ 3A Guaranteed Output Current

♦ 95 Efficiency

♦ No Schottky Diode Required

♦ 16-pin PSOP/PTSSOP power packages

♦ 6A Low Noise Current Limit Protection

♦ External Soft Start

♦ Rail to Rail output Buck Converter

APPLICATIONS

♦ Cellular Phone

♦ Cordless Phone

♦ PDAs and Handy-Terminals

♦ AGP Chipset Supplies

♦ CPU I/O Supplies

♦ Notebook Chipset Supplies

♦ Battery Operated Devices