RT9173PS

Overview

The RT9173PS is a cost-effective, high-speed linear regulator designed to generate termination voltage in double data rate (DDR) memory systems. It complies with JEDEC SSTL_2 and SSTL_18 standards, as well as HSTL, SCSI-2, and SCSI-3 interfaces. The device actively sinks or sources up to 2A while regulating output voltage within 40mV accuracy. It features integrated power MOSFETs, current limiting protection, and on-chip thermal protection. The part is available in SOP-8 packages with an exposed pad.

Feature Summary

• Actively sinks and sources continuous current for precise bus termination
• Generates termination voltage compliant with DDR-I, DDR-II, and DDR-III standards
• Includes shutdown functionality for suspend-to-ramp modes with high-impedance output

Applications

• Desktop PCs, notebooks, and workstations
• Graphics card memory termination
• Set-top boxes and digital TVs
• Embedded systems and active termination buses

Procurement Notes

Verify the specific suffix against official Richtek documentation to confirm package type and lead plating specifications. Confirm RoHS compliance status and check for end-of-life notifications prior to procurement. Ensure the selected variant matches the required SOP-8 package configuration for your design.

Selection Notes

Select this component when designing DDR memory systems requiring precise VTT generation. Evaluate the 2A sink/source capability against peak bus currents. Consider the external resistor network requirements for voltage adjustment and verify thermal performance under maximum load conditions.

Part Context

The RT9173PS belongs to the RT9173C series of bus termination regulators from Richtek Technology Corporation. This series addresses the specific needs of high-speed memory interfaces by providing stable termination voltages. The PS suffix typically denotes the SOP-8 package variant within this product family.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.