LM51571QRTERQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LM51571QRTERQ1 is an automotive-grade DC-DC switching regulator designed for high-voltage applications. It supports Boost, Flyback, and SEPIC topologies with a wide input voltage range of 1.5V to 45V. The device delivers up to 4.33A output current and features an adjustable output voltage up to 48V. Operating at a switch frequency between 100kHz and 2.2MHz, it ensures efficient power conversion. Packaged in a 16-WQFN (3x3) surface-mount case, it operates reliably from -40°C to +150°C junction temperature.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Supports multiple non-isolated topologies including boost, flyback, and SEPIC configurations
• Wide input voltage capability accommodating low cold-cranking and high transient conditions
• Integrated high-side driver enables external MOSFET control for flexible design
• Automotive qualification compliant with AEC-Q100 standards

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive lighting systems requiring wide input tolerance
• Industrial power supplies utilizing SEPIC or flyback architectures
• Battery-powered equipment needing step-up or inverted regulation
• High-voltage auxiliary power generation in vehicle ECUs

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'QTERQ1' matches the required automotive grade and tape-and-reel packaging configuration. Confirm that the 16-WQFN footprint aligns with your PCB layout constraints. Ensure the component meets AEC-Q100 requirements for your target application environment. Cross-reference the datasheet revision date to guarantee compatibility with your design specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing circuits requiring both boost and flyback capabilities within a single controller. It is suitable for applications demanding high input voltage ranges up to 45V. Consider its thermal performance in the WQFN package for dense layouts. Evaluate the need for external MOSFETs versus integrated solutions based on current requirements exceeding internal limits.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM5157x-Q1 family of wide-input synchronous buck/boost controllers. It shares architectural similarities with the LM5158-Q1 but offers distinct pinout and feature sets tailored for specific topology implementations. The series is engineered for robust automotive environments, providing reliable operation under varying load and line conditions.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The LM51571RTERQ1 serves as a direct functional substitute if automotive qualification is not strictly mandated. Verify pin-to-pin compatibility before substitution. Check if the non-automotive variant meets the thermal and reliability standards of your specific deployment scenario.