LMQ66420MA3RXBRQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LMQ66420MA3RXBRQ1 is an automotive-grade synchronous step-down converter from Texas Instruments. It supports input voltages from 3 V to 36 V and delivers a fixed 3.3 V output at up to 2 A. The device features low EMI characteristics and operates with a typical quiescent current of 1.5 µA. It utilizes a fixed switching frequency of 400 kHz and functions within a junction temperature range of -40°C to +150°C. The component is housed in a compact VQFN-FCRLF-EP-14 package, designed for space-constrained applications requiring high reliability.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Automotive qualification compliant for harsh environment operation
• Low electromagnetic interference design for sensitive systems
• Ultra-low quiescent current for efficient power management
• Integrated synchronous rectification for high efficiency

Voltage Regulators - DC DC Switching Regulators Applications

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

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number including suffixes such as MA3RXBRQ1 to ensure correct packaging, temperature grade, and tape-and-reel specifications. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure compatibility with existing PCB footprint dimensions for the VQFN-FCRLF-EP-14 package during procurement planning.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when automotive reliability and low EMI are critical requirements. The fixed 3.3 V output eliminates external resistor networks, simplifying design. Consider the 2 A current capability against peak load demands. Evaluate thermal performance within the specified -40°C to +150°C junction temperature range for the target enclosure environment.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LMQ664x0-Q1 family of ultra-small synchronous buck converters. The series offers variants with different current ratings, including 1 A and 3 A options, all sharing similar low-EMI and low-IQ characteristics. The LMQ66420 specifically targets the 2 A application segment within the automotive PMIC portfolio.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other members of the LMQ664x0-Q1 family, such as LMQ66410-Q1 or LMQ66430-Q1, depending on required current capacity. Verify pinout compatibility and thermal pad configuration before substitution.