TPS2121RUXR

Overview

The TPS2121RUXR is a power management integrated circuit functioning as an OR controller and source selector switch. It features a 2:1 input-to-output ratio with one output channel, designed for seamless power distribution from multiple sources. The device utilizes an N-channel FET type and supports a supply voltage range of 2.8V to 22V. It provides a maximum output current of 4.5A with a typical on-resistance of 6mΩ and a maximum of 70mΩ. Operating within a temperature range of -40°C to +125°C, it is housed in a 12-VQFN-HR (2x2.5) surface-mount package.

Feature Summary

• Implements priority-based power multiplexing for automatic source selection
• Enables seamless switching between multiple power inputs without interruption
• Integrates internal N-channel MOSFETs for efficient power path control

Applications

• Automatic power switching for井下 (downhole) measurement instruments
• Battery management systems requiring multi-source redundancy
• Portable devices needing uninterrupted operation during source transitions

Procurement Notes

Verify the specific suffix 'RUXR' against the manufacturer's latest datasheet to confirm pinout compatibility and thermal pad specifications. Ensure the ordering information matches the required tape-and-reel quantity standards. Cross-reference the RoHS compliance status and moisture sensitivity level (MSL 1) with your assembly process requirements. Confirm that the 12-VQFN-HR package dimensions align with your PCB footprint design guidelines before finalizing procurement.

Selection Notes

Select this component when designing systems requiring reliable power source prioritization and high-current handling up to 4.5A. It is suitable for applications demanding low on-resistance to minimize power loss during conduction. Consider the wide operating voltage range and extended temperature capability for harsh environments. Evaluate the compact VQFN package size against available board space constraints and thermal dissipation needs.

Part Context

This part belongs to the TPS2121 series of power mux ICs from Texas Instruments. It serves as a dedicated solution for managing power distribution in complex electronic systems. The series is engineered to replace traditional diode-based OR-ing configurations, offering improved efficiency and reduced component count. It integrates control logic with power switches to automate source selection based on predefined priority levels.

Replacement Considerations

TPS2121EVM-023 is an evaluation module for the TPS2121 series.