TPS2105D

Overview

The TPS2105D is an OR controller and source selector switch manufactured by Texas Instruments. It integrates N-channel and P-channel FETs to manage power selection between two input sources and a single output in a 2:1 ratio. The device operates within a supply voltage range of 2.7V to 5.5V and draws a typical supply current of 14 µA. It supports maximum output currents of 500mA and 100mA depending on the configuration. Designed for surface mount installation, it utilizes an 8-SOIC package with dimensions of 3.90mm width.

Feature Summary

• Integrates internal N-channel and P-channel switches for efficient power path management
• Provides automatic source selection between two inputs for continuous power delivery
• Features low quiescent current consumption suitable for battery-powered systems

Applications

• Handheld devices requiring redundant power sources
• Mobile equipment needing seamless power switching
• Portable electronics utilizing dual-input power architectures

Procurement Notes

Verify the specific suffix against official documentation to confirm package type and temperature range. Ensure compatibility with system voltage requirements before integration. Confirm RoHS compliance status through manufacturer datasheets. Validate pinout configurations for PCB layout accuracy. Check component availability and lifecycle status prior to final design approval.

Selection Notes

Select this component when designing circuits requiring dual-source power redundancy in compact form factors. Consider the 8-SOIC package constraints for board space limitations. Evaluate thermal performance based on expected load currents. Compare supply current specifications against other PMIC options for efficiency optimization. Ensure input voltage ranges align with available power rails.

Part Context

This part belongs to the TPS210x family of OR controllers from Texas Instruments. It shares functional similarities with the TPS2105DBVR but differs in packaging. The family targets portable applications where power continuity is critical. Related parts include variants with different package styles or extended temperature ratings.

Replacement Considerations

The TPS2105DBVR serves as a direct alternative offering identical functionality in a SOT-23-5 package. Verify pin-to-pin compatibility and thermal characteristics during substitution. Ensure the replacement meets all electrical specifications required by the original design.