NCP51199PDR2G

Overview

The NCP51199PDR2G is a DDR 2-Amp Source/Sink VTT Termination Regulator designed for DDR-2 and DDR-3 memory applications. It provides stable VTT termination voltage with ±2A peak current capability for DDR-2 and ±1.5A for DDR-3, maintaining output accuracy within ±10mV. The device features integrated power MOSFETs, fast differential amplifier response, and tracks VDDQ/2 via external resistors connected to PVCC, GND, and VREF pins.

Feature Summary

• Provides high-current source and sink capabilities specifically optimized for DDR memory VTT termination requirements.
• Integrates power MOSFETs and a fast differential amplifier for rapid transient response and precise voltage regulation.
• Includes built-in protection mechanisms such as current limiting and thermal shutdown to ensure system reliability.

Applications

• DDR-2 and DDR-3 SDRAM termination on motherboards
• Memory termination in notebook computers
• VGA card memory termination circuits

Procurement Notes

Verify the exact part number suffix against official datasheets to confirm package type and tape/reel specifications. Ensure compatibility with required operating temperature ranges and automotive qualification standards if applicable. Cross-reference pinout configurations to prevent integration errors during PCB layout and assembly processes.

Selection Notes

Select this component when designing systems requiring precise VTT tracking for DDR-2 or DDR-3 memory interfaces. Consider the ±2A source/sink capability for high-speed data transmission stability. Evaluate thermal management requirements due to integrated MOSFETs and ensure adequate decoupling capacitors are placed near the output for optimal performance.

Part Context

This regulator belongs to the NCP5119x series of linear regulators specialized for memory termination. It complements other PMIC solutions by offering dedicated VTT control without inductors, simplifying board space constraints compared to switching regulators while maintaining high precision for sensitive memory bus operations.

Replacement Considerations

NCP51199_17 serves as a direct variant within the same functional family. Verify package marking differences and specific ordering suffixes to ensure mechanical and electrical equivalence before substitution.

FAQ

How does the NCP51199 track the VDDQ voltage?

It tracks VDDQ/2 through two external divider resistors connected between PVCC, GND, and the VREF pin.

What protection features are included in this regulator?

The device includes source/sink current limiting and on-chip thermal shutdown protection to prevent damage under fault conditions.