SC4614

500kHz Voltage Mode PWM Controller POWER MANAGEMENT Description The SC4614 is a high-speed, voltage mode PWM controller that provides the control and protection features necessary for a synchronous buck converter. The SC4614 is designed to directly drive the top and bottom MOSFETs of the buck converter. It allows the converter to operate at 500kHz switching frequency with 4V to 25V power rail and as low as 0.5V output. It uses an internal 8.2V supply as the gate drive voltage for miniwww.DataSheet4U.com mum driver power loss and MOSFET switching loss. The SC4614 features soft-start, supply power under voltage lockout, and hiccup mode over current protection. The SC4614 monitors the output current by using the Rdson of the bottom MOSFET in the buck converter that eliminates the need for a current sensing resistor. The SC4614 is offered in a MSOP-10 package. SC4614 Features u 500kHz switching frequency u 4V to 25V power rails u 0.5V voltage reference for programmable output u u u u u u u voltages Internal LDO for optimum gate drive voltage 1.5A gate drive current Adaptive non-overlapping gate drives provide shoot-through protection for MOSFETs Internal soft start Hiccup mode short circuit protection Power rail under voltage lockout MSOP-10 package, fully RoHS and WEEE compliant Applications u u u u u Embedded, low cost, high efficiency converters Point of load power supplies Set top box power supplies PDP/TFT TVs Consumer electronics Typical Application Circuit 12V IN + ...