The SD8911 is a high efficiency synchronous,

SD8911

1

Features

 Up to 94% Efficiency

 Current Mode Operation for Excellent Line

and Load Transient Response

 Output Voltage: 0.6V ～ 5.5V

 Low Quiescent Current (one Channel):

200μA

 Up to 800mA Load Current

 Soft-start

 Automatic PWM/PFM Mode Switching

 No Schottky Diode Required

 1MHz Constant Frequency Operation

 Short-Circuit Protection

 Shutdown Quiescent Current: < 1μA

 DFN3*3-10L Package

Applications

 Digital cameras and MP3

 Palmtop computers / PDAs

 Cellular phones

 Wireless handsets and DSL modems

 Portable media players

 PC cards

Description

dual channel PWM step-down DC/DC converter

working under an input voltage range of 2.5V to

5.5V. It integrates two PWM synchronous

step-down DC-DC converters. 100% duty cycle

capability extends battery life in portable devices,

while the quiescent current (one channel) is

200μA with no load, and drops to <1μA in

shutdown.

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