CM3708A
3A LOW-NOISE PWM STEP-DOWN
REGULATOR
GENERAL DESCRIPTION
FEATURES
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.
The device operates in one of four modes.
Forced PWM mode operates a...