NCP5203

NCP5203 2−in−1 DDR Power Controller The NCP5203 2−in−1 DDR Power Controller is a complete power solution for an ACPI compliant high current DDR memory system. This IC combines the efficiency of a PWM controller for the VDDQ supply with the simplicity of linear regulator for the VTT termination voltage. The NCP5203 contains a synchronous PWM buck controller for driving two external NFETs to form the DDR memory supply voltage (VDDQ). The $2.0 A user adjustable VTT terminator regulator has short circuit protection. An internal power good function monitors both the VDDQ and VTT outputs and signals if a fault occurs. Protective features include soft−start, undervoltage monitoring of 5VDUAL, over protection current (OCP), and thermal shutdown. The IC is packaged in 18−lead QFN. Features http://onsemi.com MARKING DIAGRAM 18 1 18−LEAD QFN, 5 x 6 mm MN SUFFIX CASE 505 1 NCP5203 AWLYYWW Supports DDR I and DDR II Incorporates VDDQ, VTT Regulators Operates from Single 5 V Supply VTT Regulator includes Integrated Power FETs Sourcing/Sinking up to 2.0 A All External Power MOSFETs are N−Channel Adjustable VDDQ Adjustable VTT Fixed Switching Frequency of 300 kHz for VDDQ in S0 Fixed Switching Frequency of 600 kHz for VDDQ in S3 Soft−Start Protection for VDDQ Undervoltage Monitor of 5VDUAL Short−Circuit Protection for VDDQ and VTT Thermal Shutdown Housed in QFN−18 Pb−Free Package is Available* A WL YY WW = Assembly Location = Wafer Lot = Year = Work Week PI...