LMR66430MC5RXBRQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LMR66430MC5RXBRQ1 is an automotive-grade synchronous step-down DC/DC converter from Texas Instruments. It operates with an input voltage range of 3V to 36V and delivers a maximum output current of 3A. The device features a fixed 5V output and integrates a 2.2MHz switching frequency. It utilizes a VQFN-FCRLF-EP-14 package for compact board space. The component supports operation across a temperature range of -40°C to +150°C, ensuring reliability in demanding automotive environments.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Automotive qualified design supporting AEC-Q100 standards
• Integrated synchronous buck topology for high efficiency
• Wide input voltage capability up to 36V
• Compact HotRod QFN package for minimal footprint

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment system power distribution
• Telematics control unit voltage regulation
• Body control module power supply stages
• ADAS sensor interface power conditioning

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix MC5 against official Texas Instruments documentation to confirm the fixed 5V output configuration. Ensure the ordering part number matches the exact package variant and temperature rating required for your automotive application. Cross-reference the datasheet revision date to validate all electrical specifications before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing systems requiring a robust 3A synchronous buck solution within a 36V automotive input environment. The fixed 5V output simplifies external feedback network design compared to adjustable variants. Consider the thermal performance of the VQFN package relative to your PCB copper area requirements to maintain junction temperatures within safe operating limits under full load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LMR66430 family of wide-input synchronous step-down converters. The family is characterized by high efficiency and low EMI through spread spectrum modulation. The LMR66430 series targets applications needing reliable power conversion in noisy electromagnetic environments typical of modern vehicle architectures.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Consult the Texas Instruments product transition matrix for verified cross-references. Verify that any substitute maintains the same VQFN-FCRLF-EP-14 pinout and thermal pad configuration to ensure mechanical compatibility without redesigning the PCB layout.