NCP5220A

NCP5220A 3−in−1 PWM Dual Buck and Linear Power Controller The NCP5220A 3−in−1 PWM Dual Buck and Linear Power Controller, is a complete power solution for MCH and DDR memory. This IC combines the efficiency of PWM controllers for the VDDQ supply and the MCH core supply voltage with the simplicity of linear regulator for the VTT termination voltage. This IC contains two synchronous PWM buck controllers for driving four external N−Ch FETs to form the DDR memory supply voltage (VDDQ) and the MCH regulator. The DDR memory termination regulator (VTT) is designed to track at half of the reference voltage with sourcing and sinking current. Protective features include, soft−start circuitry, undervoltage monitoring of 5VDUAL, BOOT voltage and thermal shutdown. The device is housed in a thermal enhanced space−saving DFN−20 package. Features Incorporates Synchronous PWM Buck Controllers for VDDQ and VMCH Integrated Power FETs with VTT Regulator Source/Sink up to 2.0 A All External Power MOSFETs are N−Channel Adjustable VDDQ and VMCH by External Dividers VTT Tracks at Half the Reference Voltage Fixed Switching Frequency of 250 kHz for VDDQ and VMCH Doubled Switching Frequency of 500 kHz for VDDQ Controller in Standby Mode to Optimize Inductor Current Ripple and Efficiency Soft−Start Protection for All Controllers Undervoltage Monitor of Supply Voltages Overcurrent Protections for DDQ and VTT Regulators VTT Regulators Soft−Start Current Protection Fully Complies wi...