ACT4060A
Rev 0, 28-Apr-09
Wide Input 2A Step Down Converter
FEATURES
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2A Output Current
Up to 96% Efficiency
4.5V to 24V Input Range
10µA Shutdown Supply Current
400kHz Switching Frequency
Adjustable Output Voltage
Cycle-by-Cycle Current Limit Protection
Thermal Shutdown Protection
Frequency FoldBack at Short Circuit
Stability with Wide Range of Capacitors,
Including Low ESR Ceramic Capacitors
GENERAL DESCRIPTION
The ACT4060A is a current-mode step-down
DC/DC converter that provides up to 2A of output
current at 400kHz switching frequency. The device
utilizes Active-Semi’s proprietary high voltage proc-
ess for operation with input voltages up to 24V.
The ACT4060A provides fast transient response
and eases loop stabilization while providing excel-
lent line and load regulation. This device features a
very low ON-resistance power MOSFET which pro-
vides peak operating efficiency up to 96%. In shut-
down mode, the ACT4060A consumes only 10μA of
supply current.
This device also integrates protection features in-
cluding cycle-by-cycle current limit, thermal shut-
down and frequency fold-back at short circuit.
The ACT4060A is available in a SOP-8 package
and requires very few external devices for opera-
tion.
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SOP-8 Package
APPLICATIONS
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TFT LCD Monitors
Portable DVDs
Car-Powered or Battery-Powered Equipments
Set-Top Boxes
Telecom Power Supplies
DSL and Cable Modems and Routers
Termination Supplies
TYPICAL APPLICATION CIRCUIT
Up to 24V
BS
IN
EN
G
SW
2.5V/2A
ACT4060A
ENABLE
FB
COMP
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Innovative Power
TM
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www.active-semi.com
Copyright © 2009 Active-Semi, Inc.
ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
