Active-Semi
FEATURES
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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
ACT4072
Rev2, 27-May-08
Wide Input 2A Step Down Converter
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.
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SOP-8 Package
APPLICATIONS
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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
TYPICAL APPLICATION CIRCUIT
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IN
SW
V
OUT
V
IN
Up to 30V
ACT4072
ENABLE
EN
G
FB
COMP
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Innovative Power
TM
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www.active-semi.com
Copyright © 2008 Active-Semi, Inc.
ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
