ACT  -  Series DataSheet
ACT4065  -  High Input 2A Step Down Converter  -  Active Semi  -  DC-DC

FEATURES
? 2A Output Current
? Up to 95% Efficiency
? Up to 28V Input Range
? 8μA Shutdown Supply Current
? 200kHz 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
GENERAL DESCRIPTION
The ACT4065 is a current-mode step-down DC-DC converter that generates up to 2A output current at 200kHz switching frequency. The device utilizes Active-Semi’s proprietary ISOBCD30 process for operation with input voltage up to 28V.
Consuming only 8μA in shutdown mode, the ACT4065 is highly efficient with peak efficiency at 95% when in operation. Protection features include cycle-by-cycle current limit, thermal shutdown, and frequency foldback at short circuit.
The ACT4065 is available in SOP-8 package and requires very few external devices for operation.