LMR66420MC5RXBRQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LMR66420MC5RXBRQ1 is an automotive-grade synchronous step-down DC/DC converter from Texas Instruments. It supports a wide input voltage range of 3 V to 36 V and delivers up to 2 A output current. The device operates with a fixed switching frequency of 2.2 MHz and features a quiescent current of 2 µA. It provides adjustable or fixed output voltages, including a 5 V option. The component is housed in a 14-pin VQFN-FCRLF-EP package and functions within a temperature range of -40°C to +150°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Functional safety capable with documentation available to aid system certification
• Integrated low-side N-channel MOSFET for high efficiency
• Fixed 2.2 MHz switching frequency enables compact external component sizing

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment systems
• Body control modules
• Telematics units
• ADAS sensor power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix codes against the manufacturer's official datasheet to confirm output voltage configuration and thermal pad specifications. Ensure that the procurement channel provides valid traceability documents required for automotive-grade components. Cross-reference the ordering part number with the latest TI product selection guide to avoid discrepancies in packaging or revision levels.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing circuits requiring robust automotive reliability and wide input voltage tolerance. The 2 A current rating suits moderate load applications where space constraints necessitate a small footprint. Consider the 2.2 MHz frequency for balancing EMI performance against passive component size requirements in dense PCB layouts.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LMR664x0-Q1 family of synchronous buck converters designed for automotive environments. The series includes variants with different current ratings, such as 1 A and 3 A options, sharing similar pinouts and control architectures. The Q1 designation indicates compliance with automotive quality standards, ensuring suitability for demanding vehicle electronics applications.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes within the same family include LMR66410MC5RXBRQ1 (1 A) and LMR66430MC5RXBRQ1 (3 A). Verify that the alternative variant meets the specific output current demands of the application while maintaining compatibility with the existing PCB layout and thermal design.