GENERAL DESCRIPTION
The ACT4012A is a current-mode step-down DC/DC converter that generates up to 1.5A output 420kHz switching frequency. The device utilizes Active-Semi’s proprietary ISOBCD20 process for operation with input voltages up to 20V.
Consuming only 10μA in shutdown mode, the ACT4012A 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 ACT4012A is available in a SOP-8 package and requires very few external devices for operation.

FEATURES
*1.5A Output Current
*Up to 94% Efficiency
*Up to 20V Input Range
*10μA Shutdown Supply Current
*420kHz 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 Equipments
*Set-Top Boxes
*Telecom Power Supplies
*DSL and Cable Modems and Routers
*Termination Supplies

ACT4012ASH, ACT4012ASH-T

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