Wide Input 1.5A Step Down Converter
Data Sheet Rev 1, 10/2006
ACT4012
Wide Input 1.5A Step Down Converter
FEATURES
1.5A Output Curre...
Description
Data Sheet Rev 1, 10/2006
ACT4012
Wide Input 1.5A Step Down Converter
FEATURES
1.5A Output Current Up to 94% Efficiency Up to 20V 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 SOP-8 Package
GENERAL DESCRIPTION
The ACT4012 is a current-mode step-down DC-DC converter that generates up to 1.5A output current at 400kHz switching frequency. The device utilizes Active-Semi’s proprietary ISOBCD20 process for operation with input voltage up to 20V. Consuming only 10μA in shutdown mode, the ACT4012 is highly efficient with peak efficiency at 94% when in operation. Protection features include cycle-by-cycle current limit, thermal shutdown, and frequency foldback at short circuit. The ACT4012 is available in SOP-8 package and requires very few external devices for operation.
APPLICATIONS
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
Figure 1. Typical Application Circuit
Active-Semi, Inc.
1
www.active-semi.com
ACT4012
ORDERING INFORMATION
PART NUMBER ACT4012SH ACT4012SH-T TEMPERATURE RANGE -40°C to 85°C -40°C to 85°C PACKAGE SOP-8 SOP-8 PINS 8 8 PACKING TUBE TAPE & REEL
PIN CONFIGURATION
BS IN SW G 1 ...
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