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NCP5203MNR2G
2-in-1 DDR Power Controller
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 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*
Typical Applications DDR Memory Supply and Termination Voltage Active Termination Busses (SSTL−2, SSTL−3)
*For additional information on our Pb−Free strategy and soldering details, please
