MIC4724: 3A 2MHz Integrated Sw

电子工程师 2009-03-18 1307

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描述

MIC4724: 3A 2MHz Integrated Switch Buck Regulator with 6Vmax Input

General Description

The Micrel MIC4724 is a high efficiency PWM buck (step-down) regulator that provides up to 3A of output current. The MIC4724 operates at 2.0MHz and has proprietary internal compensation that allows a closed loop bandwidth of over 200KHz.

The low on-resistance internal p-channel MOSFET of the MIC4724 allows efficiencies over 92%, reduces external components count and eliminates the need for an expensive current sense resistor.

The MIC4724 operates from 3.0V to 6.0V input and the output can be adjusted down to 1V. The devices can operate with a maximum duty cycle of 100% for use in low-dropout conditions.

The MIC4724 is available in 10-pin ePAD MSOP package with a junction operating range from –40°C to +125°C.

Typical Application

Features

3.0 to 6.0V supply voltage

2.0MHz PWM mode

Output current to 3A

Up to 94% efficiency

100% maximum duty cycle

Adjustable output voltage option down to 1V

Ultra-fast transient response

Ultra-small external components
Stable with a 1µH inductor and a 4.7µF output capacitor

Fully integrated 3A MOSFET switch

Micropower shutdown

Thermal shutdown and current limit protection

Pb-free 10-pin ePAD MSOP package

–40 ° C to +125 ° C junction temperature range

MIC4724 pdf,MIC4724 datasheet

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