[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