RT8279

RT8279 5A, 36V, 500kHz Step-Down Converter General Description The RT8279 is a step-down regulator with an internal power MOSFET. It achieves 5A of continuous output current over a wide input supply range with excellent load and line regulation. Current mode operation provides fast transient response and eases loop stabilization. For protection, the RT8279 provides cycle-by-cycle current limiting and thermal shutdown protection. An adjustable soft-start reduces the stress on the input source at startup. In shutdown mode, the regulator draws only 25μA of supply current. The RT8279 requires a minimum number of readily available external components, providing a compact solution. The RT8279 is available in the SOP-8 (Exposed Pad) package. Features z z z z 5A Output Current Internal Soft-Start 110mΩ Internal Power MOSFET Switch Internal Compensation Minimizes External Parts Count High Efficiency up to 90% 25μA Shutdown Mode Fixed 500kHz Frequency Thermal Shutdown Cycle-by-Cycle Over Current Protection Wide 5.5V to 36V Operating Input Range Adjustable Output Voltage from 1.222V to 26V Available In an SOP8 (Exposed Pad) Package RoHS Compliant and Halogen Free z z z z z z z z z Ordering Information RT8279 Package Type SP : SOP-8 (Exposed Pad-Option 1) Lead Plating System G : Green (Halogen Free and Pb Free) Note : Richtek products are : ` Applications z z z z http://www.DataSheet4U.net/ Distributive Power Systems Battery Charger DSL Modems Pre-regulator for Linear Regulators ...