NCP5220 3−in−1 PWM Dual Buck and Linear Power ControllerThe NCP5220 3−in−1 PWM a Dual Buck and Linear PowerController, is a complete power solution for MCH and DDR memory.This IC combines the efficiency of PWM controllers for the VDDQsupply and the MCH core supply voltage with the simplicity of linearregulator for the VTT termination voltage.This IC contains two synchronous PWM buck controller for drivingfour external N−Ch FETs to form the DDR memory supply voltage(VDDQ) and the MCH regulator. The DDR memory terminationregulator (VTT) is designed to track at the half of reference voltagewith sourcing and sinking current.Protective features include, soft−start circuitry, undervoltagemonitoring of 5VDUAL, BOOT voltage and thermal shutdown. Thedevice is housed in a thermal enhanced space−saving DFN−20package.