ACT4070B 데이터 시트보기 (PDF) - Active-Semi, Inc
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ACT4070B Datasheet PDF : 9 Pages
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ACT4070B
Rev 0, 23-Apr-12
Wide Input 3A Step Down Converter
FEATURES
• 3A Output Current
• Up to 95% Efficiency
• 6.5V to 30V Input Range
• 100µA Shutdown Supply Current
• 4mA Standby Input Current
• 300kHz Switching Frequency
• Output Voltage Up to 12V
• Cycle-by-Cycle Current Limit Protection
• Thermal Shutdown Protection
• Internal Soft Start Function
• Frequency Fold Back at Short Circuit
• Stability with Wide Range of Capacitors
• Including Low ESR Ceramic Capacitors
• SOP-8/EP (Exposed Pad) 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
ACT4070B is a wide input voltage step-down
DC/DC converter that provides up to 3A output cur-
rent at 300kHz switching frequency. ACT4070B is a
replacement part for ACT4070 with advanced fea-
tures such as lower standby current and higher light
load efficiency. ACT4070B can be dropped into
ACT4070 socket with only feedback resistance
value changed.
ACT4070B’s protection features include Cycle-by-
Cycle current limit, thermal shutdown, and fre-
quency foldback at over current and short circuit.
The devices are available in a SOP-8EP package
and require very few external devices for operation.
NOTE:
∗ ACT4070B is the replacement part for
ACT4070.
TYPICAL APPLICATION CIRCUIT
100
80
60
40
20
0
1
Efficiency vs. Load Current
VIN = 12V
VIN = 24V
VOUT = 5V
10
100
1000
10000
Load Current (mA)
Innovative PowerTM
-1-
www.active-semi.com
Copyright © 2012 Active-Semi, Inc.
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