ACT4012A

ACT4012A Rev0, 16-May-08 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 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 S-Top Boxes Telecom Power Supplies DSL and Cable Modems and Routers Termination Supplies 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 efficienc...