LMQ66420MC5RXBRQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LMQ66420MC5RXBRQ1 is an automotive-grade synchronous step-down converter from Texas Instruments. It operates with a 36-V input and delivers up to 2 A of output current. The device features a low quiescent current of 1.5 µA and supports adjustable or fixed output voltages, specifically including a 5 V fixed option. It utilizes a VQFN-FCRLF package (RXB) with 14 pins. The component is qualified under AEC-Q100 standards and functions within a junction temperature range of -40°C to 150°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Low electromagnetic interference design for sensitive automotive environments
• High efficiency operation with spread spectrum frequency modulation
• Integrated protection mechanisms including over-current and power good signaling

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment systems
• Telematics control units
• Body control modules

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'C5' indicates the fixed 5V output variant when ordering. Confirm the RXB package type matches your PCB footprint requirements. Ensure compliance with AEC-Q100 qualification standards for your automotive application. Check the datasheet for exact thermal performance data relative to your board layout.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for applications requiring high input voltage tolerance up to 36 V. Consider the 2 A current limit for moderate power loads. The low EMI feature is critical for noise-sensitive automotive electronics. Evaluate the VQFN-FCRLF package for space-constrained designs requiring efficient thermal dissipation.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LMQ664xx family of automotive buck converters. It shares core architecture with other variants in the series but differs in output configuration and package. The family is designed for robust performance in harsh automotive environments, offering reliability and efficiency improvements over previous generations.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Consult official substitution guides for compatible parts within the LMQ664xx series. Verify pinout compatibility before replacing existing components. Ensure electrical specifications match the original design requirements.