ACT4082A

Active-Semi ACT4082A Rev0, 16-May-08 16V, 1.2A, 1.4MHz Step-Down DC/DC Converter in SOT23-6 FEATURES Wide 4.5V to 16V Input Voltage Range 1.2A Output Current (12VIN to 5VOUT) Output Adjustable Down to 0.81V 0.3Ω Internal Power MOSFET Up to 92% Efficiency Stable with Low ESR Ceramic Output Capacitors Fixed 1.4MHz Operating Frequency Internal Soft-Start Function Over Current Protection with Hiccup-Mode Thermal Shutdown Available in a SOT23-6 Package APPLICATIONS TFT LCD Monitors Portable DVDs, Headphones, MP3 Players, etc. Car-Powered or Battery-Powered Equipment Set-Top Boxes Telecom Power Supplies DSL and Cable Modems and Routers GENERAL DESCRIPTION The ACT4082A is a current-mode step-down DC/DC converter that supplies up to 1.2A into 5V from a 12V input. 1.4MHz switching frequency allows the use of tiny external components, and internal loop compensation provides simple, stable power supplies with a minimum of ...