RT8207LGQW

Overview

The RT8207LGQW is a complete power supply controller for DDRII/DDRIII memory systems, integrating a synchronous PWM buck controller and a 3A sink/source tracking linear regulator. It features a buffered low-noise reference with ±20mV accuracy. The device supports fixed 1.8V (DDRII), 1.5V (DDRIII), or adjustable 0.75V to 3.3V output ranges. Input voltage spans 2.5V to 26V. Key electrical parameters include 1% VOUT accuracy, quick load-step response within 100ns, and a 10mA buffered VTTREF output. It operates in a 24-WQFN package.

Feature Summary

• Integrates a synchronous PWM buck controller with a 3A sink/source tracking linear regulator for comprehensive memory power management.
• Provides a buffered low-noise reference output with high accuracy to support strict DDR voltage requirements.
• Features quick load-step response capability within 100ns to maintain stability during rapid current changes.
• Supports high-Z state in S3 sleep mode and soft-off functionality in S4/S5 power states.

Applications

• DDRII and DDRIII memory power supplies
• Notebook computer mainboard designs
• SSTL18, SSTL15, and HSTL bus termination circuits

Procurement Notes

Verify the specific suffix LGQW against the manufacturer's latest datasheet to confirm pinout compatibility and package dimensions. Ensure the component meets RoHS compliance and halogen-free requirements as specified in the official documentation. Cross-reference the ordering information with authorized distributors to confirm availability and authenticity before procurement.

Selection Notes

Select this component when designing power solutions for DDRII or DDRIII memory interfaces requiring integrated regulation. The device is suitable for applications needing a combined VDD/VDDQ buck converter and VTT LDO in a compact footprint. Consider the 2.5V to 26V input range and the need for precise voltage tracking between data and termination rails.

Part Context

The RT8207 series serves as a specialized power management IC for DDR memory applications. The RT8207LGQW variant specifically integrates both the core memory voltage generation and the termination voltage regulation into a single solution. This integration reduces component count and board space compared to discrete implementations.

Replacement Considerations

RT8207LZQW and RT8207MZQW are documented variants within the same family offering similar functional capabilities for DDR memory power supplies.