NCV51199PDR2G

Overview

The NCV51199PDR2G is a linear regulator designed for DDR-2 and DDR-3 memory applications, providing stable VTT termination voltage. It supports peak currents of ±2A for DDR-2 and ±1.5A for DDR-3, maintaining output accuracy within ±10mV. The device tracks VDDQ/2 via external resistors connected to the VREF pin. It features an exposed thermal pad for heat dissipation and includes integrated power MOSFETs. Absolute maximum ratings include input voltages up to 6V and a junction temperature limit of 125°C.

Feature Summary

• Provides high-current source and sink capabilities tailored for DDR memory termination requirements.
• Ensures precise output voltage tracking relative to the memory data bus reference level.
• Incorporates fast transient response mechanisms with built-in soft-start functionality.
• Includes comprehensive protection features such as current limiting and thermal shutdown.

Applications

• DDR-2 SDRAM termination on motherboards
• DDR-3 SDRAM termination in notebook computers
• Memory termination for VGA cards
• Power supply for DDR memory in set-top boxes

Procurement Notes

Verify that the specific suffix PDR2G corresponds to the SOIC-8 package variant when sourcing. Confirm that the NCV prefix indicates AEC-Q100 qualification suitable for automotive environments if required by the design specifications. Ensure compatibility with RoHS standards for environmental compliance. Cross-reference the datasheet revision to confirm pinout consistency with existing board layouts.

Selection Notes

Select this component when designing systems requiring precise VTT regulation for DDR-2 or DDR-3 interfaces. Consider the ±2A peak current capability for DDR-2 designs or ±1.5A for DDR-3. Evaluate thermal management needs due to the linear regulation topology. Verify that the external resistor network for VREF tracking aligns with the target VDDQ levels. Assess the SOIC-8 package constraints for PCB space limitations.

Part Context

This part belongs to the NCP/NCV51199 family of specialized PMICs focused on memory power integrity. The NCV prefix distinguishes it as an automotive-grade version compared to the standard NCP variant. It complements other memory interface components by handling the critical termination voltage generation. The family addresses the stringent noise and stability requirements of modern synchronous DRAM technologies.

Replacement Considerations

NCP51199PDR2G serves as the commercial grade equivalent without automotive qualification. NCV51198 offers lower current capacity for different memory densities. Verify package and pinout compatibility before substitution. Check thermal performance differences between linear and switching alternatives.