LM51571RTER

Voltage Regulators - DC DC Switching Regulators Overview

The LM51571RTER is a DC-DC switching regulator IC manufactured by Texas Instruments, designed for boost, flyback, and SEPIC topologies. It features an adjustable output voltage ranging from 1.5V to 48V with a single positive output configuration. The device supports an input voltage range of 2.9V to 45V and delivers a switch current of 4.33A. Operating frequencies are programmable between 100kHz and 2.2MHz. It utilizes a 16-WFQFN package with an exposed pad, suitable for surface mount installation, and operates within a junction temperature range of -40°C to 125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Supports multiple converter topologies including boost, flyback, and SEPIC configurations
• Features adjustable output voltage capability across a wide range
• Includes integrated shutdown functionality for power management

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial power supply systems requiring flexible topology options
• Automotive electronics applications compatible with standard temperature grades
• General-purpose DC-DC conversion in compact embedded designs

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix RTER against official Texas Instruments documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with your PCB footprint for the 16-WQFN(3x3) component outline. Cross-reference the datasheet for moisture sensitivity level and reflow soldering profiles to guarantee assembly reliability. Confirm that the non-synchronous rectifier design aligns with your efficiency requirements.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a versatile controller supporting boost, flyback, or SEPIC modes is required within a 45V input limit. The 4.33A switch current rating suits moderate power applications where external synchronous rectification is preferred or unnecessary. Consider the 100kHz to 2.2MHz frequency range for balancing component size and efficiency. Verify that the 125°C junction temperature rating meets your thermal design constraints compared to automotive-grade alternatives.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM5157 family of wide input voltage controllers. It shares architectural similarities with the LM5157 and LM5158 series but offers specific current limiting characteristics tailored for distinct load requirements. The family enables designers to implement various isolated and non-isolated converter stages using a single control architecture.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitutes include LM5157RTER and LM51571QRTERQ1. Note that the QRTERQ1 variant carries AEC-Q100 automotive qualification and may differ in operating temperature ranges. Direct pin-to-pin replacement requires verification of electrical parameter overlaps and thermal performance in the target application.