RT9173CGSP

Overview

The RT9173CGSP is a high-speed linear regulator designed for DDR memory termination. It actively sinks or sources up to 2A while regulating output voltage within 40mV accuracy. The device supports SSTL_2, SSTL_18, HSTL, SCSI-2, and SCSI-3 interfaces. It features integrated power MOSFETs, current limiting protection, and on-chip thermal shutdown. The component operates with no VIN and VCNTL power sequence issues and includes a shutdown function for suspend-to-RAM applications. It is housed in an SOP-8 package with an exposed pad.

Feature Summary

• Provides active sink and source current capability for precise memory termination voltage regulation
• Integrates power MOSFETs to minimize external component count and simplify design
• Includes built-in current limiting and thermal protection for enhanced system reliability

Applications

• DDR-I, DDR-II, and DDR-III memory systems
• Graphics card memory termination
• Desktop PCs, notebooks, and workstations
• Set-top boxes and digital TVs

Procurement Notes

Verify the specific suffix 'GSP' against official Richtek documentation to confirm the exact package type and tape-and-reel specifications. Ensure compatibility with required termination voltages for target DDR generations. Confirm RoHS compliance status and lead-free certification through manufacturer declarations prior to procurement.

Selection Notes

Select this component when designing systems requiring precise VTT termination for DDR memory interfaces. It is suitable for applications needing high accuracy under full load conditions. Consider the SOP-8 exposed pad package for thermal management requirements. Evaluate if the 2A continuous current rating meets the peak transient demands of the memory bus.

Part Context

The RT9173C series belongs to Richtek's portfolio of cost-effective linear regulators optimized for digital logic termination. This family addresses the specific needs of high-speed data buses by providing stable reference voltages. The CGSP variant represents a specific packaging and handling configuration within this functional group.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify cross-reference availability directly with Richtek Technology Corporation using official datasheets.