ACT4060A
Rev 1, 25-Jun-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
process for operation with input voltages up to 24V.
The ACT4060A provides fast transient response
and eases loop stabilization while providing
excellent line and load regulation. This device
features a very low ON-resistance power MOSFET
which provides peak operating efficiency up to 96%.
In shutdown mode, the ACT4060A consumes only
10μA of supply current.
This device also integrates protection features
including cycle-by-cycle current limit, thermal
shutdown and frequency fold-back at short circuit.
The ACT4060A is available in a 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
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
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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 ]
