RT9089AGQW(2)

Overview

The RT9089AGQW(2) is a sink/source tracking termination regulator designed for DDR memory applications. It features an adjustable output voltage range of 1.14V to 3.6V and supports a maximum output current of 3A. The device operates with an input voltage range from 2.7V to 5.5V. Key electrical specifications include a quiescent current of 1.5mA, a line regulation of 0.01%/V, and a load regulation of 1mV. The unit is housed in a WQFN-16 package (3x3mm) and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Provides precise sink and source current capabilities for accurate DDR bus termination control.
• Features a tracking input pin that synchronizes the output voltage with the memory VDDQ supply rail.
• Integrates internal compensation and protection mechanisms including thermal shutdown and over-current limiting.

Applications

• DDR3/DDR3L memory module termination
• DDR4 memory bus termination
• High-speed digital interface signal integrity management

Procurement Notes

Verify the specific suffix designation against the manufacturer's official documentation to confirm pinout compatibility and functional equivalence. Ensure the procurement channel provides valid RoHS compliance declarations and traceability records. Cross-reference the manufacturing date code with the component datasheet revision history to guarantee design consistency. Confirm that the supplier offers appropriate handling protocols for moisture-sensitive devices.

Selection Notes

Select this component when designing systems requiring high-precision termination for DDR memory interfaces. The wide output voltage adjustability allows adaptation to various memory standards. Evaluate the thermal performance requirements based on the expected load current and ambient operating conditions. Consider the small footprint advantage for space-constrained mobile and embedded designs.

Part Context

This part belongs to Richtek's portfolio of power management integrated circuits focused on memory subsystems. It addresses the critical need for stable voltage termination in high-speed data transmission environments. The series complements other PMIC solutions by providing specialized regulation for sensitive analog and digital memory loads.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify cross-references with the manufacturer before considering alternative components.

FAQ

How does the RT9089AGQW(2) handle dynamic load changes?

The regulator utilizes internal compensation to maintain stability during rapid transitions between sink and source modes, ensuring consistent bus termination impedance.

What is the purpose of the tracking input?

The tracking input allows the regulator's output voltage to follow the memory VDDQ supply, minimizing the voltage differential across the termination resistors.