RT7264A

® RT7264A 4A, 21V, 500kHz Synchronous Step-Down Converter General Description The RT7264A is a synchronous step-down regulator with an internal power MOSFET. It achieves 4A 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. Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown. An adjustable soft-start reduces the stress on the input source at startup. The RT7264A requires a minimal number of readily available external components, providing a compact solution. Features z z z z z z z z z z z Wide Input Range : 4.5V to 21V Adjustable Output from 0.808V to 15V 4A Output Current 120mΩ/40mΩ Internal Power MOSFET Switch Internal Compensation Minimizes External Parts 500kHz Fixed Switching Frequency Synchronized External Clock from 300kHz to 2MHz Adjustable Soft-Start Cycle-by-Cycle Over Current Limit Thermal Shutdown Protection Available in SOP-8 (Exposed Pad) and WDFN-14L 4x3 Packages RoHS Compliant and Halogen Free z Ordering Information RT7264A Package Type QW : WDFN-14L 4x3 (W-Type) SP : SOP-8 (Exposed Pad-Option 2) Lead Plating System Z : ECO (Ecological Element with Halogen Free and Pb free) Note : Richtek products are : ` Applications z z z z Distributive Power Systems Battery Charger DSL Modems Pre-Regulator for Linear Regulators RoHS compliant and compatible with the current requirements of IPC/JE...