RT8207GQW

Overview

The RT8207GQW is a complete power supply controller for DDRII, DDRIII, and Low-Power DDRIII memory systems. It integrates a synchronous PWM buck controller with a 3A sink/source tracking linear regulator (VTT) and a buffered low-noise reference (VTTREF). The device supports battery input ranges from 2.5V to 26V and offers fixed 1.8V or 1.5V outputs, or an adjustable range of 0.75V to 3.3V. Key electrical specifications include 1% VOUT accuracy over line and load conditions, quick load-step response within 100ns, and resistor-programmable switching frequency. The integrated LDO requires only a 20μF ceramic output capacitor.

Feature Summary

• Integrates a synchronous PWM buck controller with a 3A sink/source tracking linear regulator and buffered low-noise reference
• Provides quick load-step response within 100ns and 1% VOUT accuracy over line and load conditions
• 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 memory subsystems
• SSTL18, SSTL15, and HSTL bus termination circuits

Procurement Notes

Verify the specific suffix against official Richtek documentation to confirm pinout compatibility and thermal performance characteristics. Ensure the selected variant matches the required output voltage configuration and package type for your design. Cross-reference datasheet revisions to confirm RoHS compliance status and any recent manufacturing changes before finalizing procurement orders.

Selection Notes

Select this component when designing power architectures for DDR memory interfaces requiring integrated VTT regulation and reference buffering. The device is suitable for applications needing fast transient response and precise voltage accuracy. Consider the input voltage range and thermal requirements of the WQFN package when evaluating suitability for space-constrained mobile designs.

Part Context

The RT8207 series serves as a specialized power management solution for dynamic random-access memory (DRAM) applications. It consolidates multiple power stages into a single IC, reducing component count and board space. This integration addresses the stringent power delivery requirements of modern memory standards while maintaining signal integrity through low-noise reference outputs.

Replacement Considerations

RT8207LGQW, RT8207MZQW