General Description

The MAX1572 is a fixed-frequency, synchronous stepdown DC-to-DC converter to power low-voltage microprocessor/DSP cores in portable equipment requiring high efficiency in a limited PC board area. The features are optimized for high efficiency over a wide load range, small external component size, low output ripple, and excellent transient response.

Features

♦ Up to 97 Efficiency

♦ 2MHz PWM Switching

♦ 800mA Guaranteed Output Current

♦ Low 48µA Quiescent Current

♦ Power-Saving Modes: Pulse-Group, Pulse-Skip,

   Forced-PWM Mode

♦ 0.75V to 2.5V Preset Output Range

   (in 50mV Increments)

♦ Voltage-Positioning Load Transients

♦ 5mVP-P Output Ripple

♦ Tiny 2.2µH Inductor

♦ 10µF Ceramic Output Capacitor

♦ Low 0.1µA Shutdown Current

♦ No External Schottky Diode Required

♦ Soft-Start with Zero Inrush Current

♦ 170ms (min) RESET Output

♦ Small 12-Pin, 4mm x 4mm Thin QFN Package

Applications

   Cell Phones and Smart Phones

   PDAs, Palmtops, and Notebook Computers

   MP3 and DVD Players

   Digital Cameras and Camcorders

   PCMCIA Cards

   Hand-Held Instruments