GENERAL DESCRIPTION

The ADP3051 is a low noise, current mode, pulse width modulator (PWM) step-down converter capable of supplying over 500 mA to output voltages as low as 0.8 V. This device integrates a low resistance power switch and synchronous rectifier, providing excellent efficiency over the entire output voltage range and eliminating the need for a large and costly external Schottky rectifier. Its 550 kHz switching frequency permits the use of small external components.

FEATURES

Current mode control for simple loop compensation

Input voltage range: 2.7 V to 5.5 V

Output voltage range: 0.8 V to 5.5 V

Tri-Mode™ operation for high efficiency

550 kHz PWM operating frequency

High accuracy over line, load, and temperature

Micropower shutdown mode

Space-saving MSOP-8 package

APPLICATIONS

Li-ion powered handhelds

MP3 players

PDAs and palmtops

Consumer electronics