TPS2115PW

Overview

The TPS2115PW is an autoswitching power multiplexer manufactured by Texas Instruments, designed for efficient power distribution in portable electronics. It features a single output with two selectable inputs, operating within a supply voltage range of 2.8 V to 5.5 V. The device supports a maximum continuous output current of 1.25 A and includes adjustable current limiting ranging from 630 mA to 2 A. Key electrical parameters include a maximum on-resistance of 110 mOhms, a maximum turn-on time of 1 ms, and a maximum turn-off time of 5 ms. It operates reliably across a temperature range of -40°C to +85°C.

Feature Summary

• Autoswitching functionality automatically selects the highest available input source without external control logic.
• Adjustable current limit allows customization of protection thresholds to match specific load requirements.
• Low on-resistance minimizes power loss and heat generation during normal operation.
• Fast switching times ensure seamless transitions between power sources to maintain system stability.

Applications

• Portable handheld devices requiring redundant power sources
• Battery backup systems for critical circuitry
• Power management in mobile communication equipment
• Embedded systems needing automatic source selection

Procurement Notes

Verify the package type matches the required PCB footprint, as the TPS2115 series includes both TSSOP and SOIC variants. Confirm the suffix indicates the correct reel or tube packaging for automated assembly processes. Ensure the operating temperature range meets the environmental specifications of the target application. Cross-reference the datasheet revision to confirm compatibility with existing design files and simulation models.

Selection Notes

Select this component when automatic source prioritization is required without complex microcontroller intervention. Consider the adjustable current limit feature if precise overcurrent protection is needed for sensitive loads. Evaluate the low on-resistance specification for applications where efficiency and thermal management are critical constraints. Compare the switching speed against system requirements to ensure minimal interruption during power source transitions.

Part Context

The TPS2115PW belongs to the TPS2115A family of power multiplexers, which are part of Texas Instruments' broader portfolio of power management integrated circuits. This family focuses on simplifying power distribution architectures in space-constrained designs. The PW suffix specifically denotes the TSSOP-8 package variant, distinguishing it from other pinout or form-factor options within the same functional family.

Replacement Considerations

Public confirmed substitute part numbers: TPS2115APW, TPS2115APWR, TPS2115AEVM-061 (evaluation module). Verify pin-to-pin compatibility and parameter equivalence before substitution.