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NCP5218 2−in−1 Notebook DDR Power ControllerThe NCP5218 2−in−1 Notebook DDR Power Controller isspecifically designed as a total power soluTIon for notebook DDRmemory system. This IC combines the efficiency of a PWMcontroller for the VDDQ supply with the simplicity of linearregulators for the VTT terminaTIon voltage and the buffered low noisereference. This IC contains a synchronous PWM buck controller fordriving two external NFETs to form the DDR memory supplyvoltage (VDDQ). The DDR memory terminaTIon regulator outputvoltage (VTT) and the buffered VREF are internally set to track at thehalf of VDDQ. An internal power good voltage monitor tracks VDDQoutput and noTIfies the user whether the VDDQ output is within targetrange. Protective features include soft−start circuitries, undervoltagemonitoring of supply voltage, VDDQ overcurrent protection, VDDQovervoltage and undervoltage protections, and thermal shutdown.The IC is packaged in DFN22.
