ACT4050

Active-Semi ACT4050 Rev 2, 01-Jul-11 Wide Input 3.5A Step Down Converter FEATURES 3.5A Output Current Up to 96% Efficiency 4.5V to 15V Input Range 12µA Shutdown Supply Current 400kHz Switching Frequency Adjustable Output Voltage From 0.817V Cycle-by-Cycle Current Limit Protection Thermal Shutdown Protection Frequency Fold-Back at Short Circuit Stability with Wide Range of Capacitors, Including Low ESR Ceramic Capacitors SOP-8/EP (Exposed Pad) Package APPLICATIONS Digital TV Portable DVDs Car-Powered or Battery-Powered Equipments Set-Top Boxes Telecom Power Supplies Consumer Electronics GENERAL DESCRIPTION The ACT4050 is a current-mode step-down DC/DC converter that provides up to 3.5A of output current at 400kHz switching frequency. The device utilizes Active-Semi’s proprietary high voltage process for operation with input voltages up to 15V. The ACT4050 provides fast transient response and eases loop stabilizati...