®
FEATURES
• 2A Output Current
• Up to 95% Efficiency
• 6.0V to 30V Input Range
• 210kHz 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
• SOP-8 Package
APPLICATIONS
• TFT LCD Monitors
• Portable DVDs
• Car-Powered or Battery-Powered Equip-
ments
• Set-Top Boxes
• Telecom Power Supplies
• DSL and Cable Modems and Routers
• Termination Supplies
ACT4065A
Rev 0, 23-Apr-12
High Input 2A Step Down Converter
GENERAL DESCRIPTION
The ACT4065A is a current-mode step-down
DC/DC converter that generates up to 2A output
current at 210kHz switching frequency.
The ACT4065A is highly efficient with peak effi-
ciency at 95% when in operation. Protection fea-
tures include cycle-by-cycle current limit, thermal
shutdown, and frequency foldback at short circuit.
The ACT4065A is available in SOP-8 package and
requires very few external devices for operation.
Note: ACT4065A is the drop-in replacement for
ACT4065 with feedback resistance value change.
Innovative PowerTM
Efficiency vs. Load current
95
VIN = 12V
90
85
VIN = 24V
80
75
70
10
VOUT = 5V
100
1000
Load Current (mA)
10000
-1-
www.active-semi.com
Copyright © 2012 Active-Semi, Inc.