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Controllers | NCP5203
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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 +/- 2.0A 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, under-voltage monitoring of 5VDUAL, over current protection (OCP), and thermal shutdown. The IC is packaged in 18-lead QFN.
- Desktop DDR Memory
- Graphics Card DDR Memory
- Incorporates VDDQ, VTT Regulators
- Operates from Single 5.0V Supply
- 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 VDDQ and VTT
- Thermal Shutdown
- Housed in QFN-18
- VTT Regulator includes Integrated Power FETs Sourcing/Sinking up to 2.0A
- Pb-Free Package is Available*
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