描述 Description

The ACE72251LA is a high-efficiency, DC to DC step-down switching regulators, capable of

delivering up to 1.5A of output current. The device operates from an input voltage range of 2.6V to 6V and

provides an output voltage from 0.6V to VIN. Working at a fixed frequency of 2MHz allows the use of

small external components, such as ceramic input and output caps, as well as small inductors, while still

providing low output ripples. This low noise output along with its excellent efficiency achieved by the

internal synchronous rectifier, making ACE72251LA an ideal replacement for large power consuming

linear regulators. Internal soft-start control circuitry reduces inrush current. Short-circuit and thermal

shutdown protection improves design reliability.

The ACE72251LA is available in SOT23-5, DFN2x2-6 package.

特性 Features

? High efficiency: up to 97

? Up to 1.5A Max output current

? 2MHz switching frequency

? Low dropout 100 duty operation

? Internal compensation and soft-start

? Current mode control

? Reference 0.6V

? Logic control shutdown (IQ<1uA)

? Thermal shutdown, UVLO

Application

? Cellular phones

? Digital Cameras

? MP3 and MP4 players

? Set top boxes

? Wireless and DSL Modems

? USB supplied Devices in Notebooks

? Portable Devices