TPS54122RHLT

Overview

The TPS54122RHLT is a dual-output power management integrated circuit from Texas Instruments, combining a synchronous step-down converter and a low-dropout linear regulator. It operates with an input voltage range of 2.95V to 6V. The switching regulator provides up to 3A output current with adjustable voltage between 0.8V and 3.6V, while the LDO also supports 0.8V to 3.6V at 3A. The device features a programmable switching frequency from 300kHz to 2MHz and is housed in a 24-VQFN package measuring 5.5x3.5mm.

Feature Summary

• Integrates a high-efficiency synchronous buck converter and a low-noise LDO within a single compact package for space-constrained designs.
• Features a wide operating input voltage range suitable for single-cell lithium-ion battery applications.
• Includes internal compensation and soft-start functionality to simplify external component requirements and ensure stable startup.

Applications

• Portable electronics powered by single-cell lithium-ion batteries
• Embedded systems requiring multiple regulated voltage rails
• Industrial control modules with limited board space

Procurement Notes

Verify the specific suffix RHLT corresponds to the cut tape packaging configuration when ordering. Confirm that the 24-VQFN thermal pad connection meets your PCB layout requirements for adequate heat dissipation. Ensure the selected switching frequency aligns with your electromagnetic interference constraints and inductor selection.

Selection Notes

Select this component when a design requires both high-current switching regulation and clean analog power supply from a single low-voltage source. Compare against the TPS54120 if higher input voltage tolerance or different current ratings are needed. Evaluate the thermal performance in your specific enclosure before finalizing the choice.

Part Context

This part belongs to the TPS5412x family of dual-output PMICs designed for portable applications. It shares architectural similarities with the TPS54120 but differs in input voltage specifications and current capabilities. The family targets applications needing efficient power conversion from single-cell lithium sources.

Replacement Considerations

Public confirmed substitute part numbers: None identified in provided documentation.