LM5157QRTERQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LM51571QRTERQ1 is an automotive-grade, adjustable boost, flyback, and SEPIC switching regulator IC manufactured by Texas Instruments. It operates with a minimum input voltage of 1.5 V and supports output voltages up to 48 V. The device delivers an output current of 4.33 A and features an adjustable switching frequency ranging from 100 kHz to 2.2 MHz. It is housed in a 16-WFQFN package with an exposed pad and is rated for junction temperatures between -40°C and +150°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Supports multiple non-isolated topologies including boost, flyback, and SEPIC configurations
• Capable of single-cell battery startup operation
• Includes integrated soft-start functionality to limit inrush current
• Features adjustable switching frequency for optimization of external component size

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment systems
• Body control modules
• Industrial power supplies
• Communication equipment

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'Q1' confirms AEC-Q100 qualification for automotive reliability standards. Confirm the 'TER' package designation matches the required 16-WQFN (3x3) footprint and thermal pad specifications for your PCB layout. Ensure the design accounts for the maximum junction temperature rating of 150°C during thermal analysis.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a wide input voltage range starting at 1.5 V is required for single-cell lithium-ion or lead-acid battery applications. Choose this part over synchronous alternatives if cost reduction is prioritized and efficiency requirements allow for asynchronous rectification. Verify that the target output voltage does not exceed the 48 V maximum rating.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM5157x family of wide-input non-synchronous converters. It shares architectural similarities with the LM5157 but offers enhanced automotive qualification. The family is designed for applications requiring flexible topology selection and robust performance across varying input conditions.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM5157RTER is the commercial grade equivalent without automotive qualification. LM51571RTER is the commercial version of this specific part number. Cross-reference pinouts and thermal characteristics before substitution.