ACT4070

ACT4070 Rev 2, 16-Sep-11 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 shutdo...