TPS2115PWR

Overview

The TPS2115PWR is an autoswitching power multiplexer manufactured by Texas Instruments, designed for efficient power distribution in portable electronics. It features a single output sourced from two independent inputs, supporting an output current of up to 1.25 A with a maximum on-resistance of 110 mΩ. The device operates within a supply voltage range of 2.8 V to 5.5 V and includes adjustable current limiting between 630 mA and 2 A. It utilizes an 8-pin TSSOP package and functions reliably across a temperature range of -40°C to +85°C.

Feature Summary

• Autoswitching mechanism automatically selects the optimal input source based on voltage levels without external control signals.
• Adjustable current limit threshold allows customization of protection levels to match specific load requirements.
• Low on-resistance minimizes power loss and heat generation during high-current operation.

Applications

• Battery backup systems requiring seamless switching between primary and secondary power sources
• Portable devices needing redundant power paths for enhanced reliability
• Systems utilizing multiple voltage rails where automatic source selection is required

Procurement Notes

Verify the exact suffix against the manufacturer's official documentation to confirm pinout compatibility and electrical specifications. Ensure the component meets the required automotive or industrial qualification standards if applicable to your design. Cross-reference the datasheet revision date to ensure alignment with your project's technical constraints.

Selection Notes

Select this component when designing circuits that require automatic redundancy between two power sources without complex control logic. It is suitable for applications demanding low standby current and fast switching times. Consider the thermal performance and package size relative to the available PCB space and expected load currents.

Part Context

This part belongs to the TPS2115 family of power muxes, which are optimized for portable applications. It serves as a critical interface for managing power flow in battery-operated devices, ensuring continuous operation even if one power source fails or drops below a certain threshold.

Replacement Considerations

Check for direct substitutes such as the TPS2114A series, which offers similar functionality but may differ in pin configuration or specific electrical limits. Verify compatibility with existing board layouts and control signals before transitioning to alternative components.

FAQ

How does the TPS2115PWR determine which input to switch to?

It uses an internal autoswitching circuit that continuously monitors both input voltages and automatically connects the output to the higher voltage source.

Can the current limit be adjusted?

Yes, the current limit is adjustable via an external resistor connected to the ILIM pin, allowing users to set the threshold between 630 mA and 2 A.