ACT4072SH-T 查看數據表（PDF） - Active-Semi, Inc

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ACT4072SH-T

Wide Input 2A Step Down Converter

Active-Semi, Inc 

Active-Semi

ACT4072

Rev2, 27-May-08

Wide Input 2A Step Down Converter

FEATURES

• 2A Output Current

• Up to 95% Efficiency

• Up to 30V Input Range

• 6µA Shutdown Supply Current

• 420kHz Switching Frequency

• Adjustable Output Voltage

• Cycle-by-Cycle Current Limit Protection

• Thermal Shutdown Protection

• Frequency Fold-Back at Short Circuit

• Stability with Wide Range of Capacitors,

Including Low ESR Ceramic Capacitors

• SOP-8 Package

APPLICATIONS

• TFT LCD Monitors or Televisions and HDTV

• Portable DVD Players

• Car-Powered or Battery-Powered Equipment

• Set-Top Boxes

• Telecom Power Supplies

• DSL and Cable Modems and Routers

GENERAL DESCRIPTION

The ACT4072 is a current-mode step-down DC/DC

converter that generates up to 2A output current at

420kHz switching frequency. The device utilizes

Active-Semi’s proprietary ISOBCD30 process for

operation with input voltage up to 30V.

Consuming only 6µA in shutdown mode, the

ACT4072 is highly efficient with peak efficiency at

95% when in operation. Protection features include

cycle-by-cycle current limit, thermal shutdown, and

frequency fold-back at short circuit.

The ACT4072 is available in SOP-8 package and

requires very few external devices for operation.

TYPICAL APPLICATION CIRCUIT

Up to 30V

BS

VIN

IN

SW

VOUT

ACT4072

ENABLE

EN

FB

G

COMP

+

Innovative PowerTM

-1-

www.active-semi.com

Copyright © 2008 Active-Semi, Inc.

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