ACT4070 View Datasheet(PDF) - Unspecified
Part Name
Description
MFG CO.
'ACT4070' PDF : 10 Pages View PDF
ACT4070
Rev 0, 12/2006
Wide Input 3A Step Down Converter
FEATURES
3A Output Current
Up to 95% Efficiency
4.5V to 30V Input Range
6µA Shutdown Supply Current
400kHz Switching Frequency
Adjustable Output Voltage
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
The ACT4070 is a current-mode step-down
DC/DC converter that generates up to 3A output
current at 400kHz 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
ACT4070 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 device also includes an internal soft start
function to prevent overshoot.
The ACT4070 is available in SOP-8/EP exposed
pad package and requires very few external
devices for operation.
TYPICAL APPLICATION CIRCUIT
Innovative Products. Active Solutions.
-1-
Copyright © 2006 Active-Semi, Inc.
www.active-semi.com
Share Link: 
