LMR34215FSC5RNXRQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LMR34215FSC5RNXRQ1 is an automotive-grade synchronous step-down converter from Texas Instruments. It operates with an input voltage range of 4.2 V to 42 V and delivers a fixed output of 5 V at up to 1.5 A. The device utilizes peak-current-mode control for high efficiency and accuracy. It features a low quiescent current of 26 µA and supports switching frequencies up to 2.1 MHz. Qualified to AEC-Q100 standards, it functions reliably between -40°C and +150°C junction temperature.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability in harsh environments.
• Ultra-small form factor utilizing a 12-pin VQFN-HR package for space-constrained designs.
• Integrated synchronous rectification provides high efficiency across the load range.
• Precision enable functionality allows flexible power sequencing and system management.

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment systems requiring stable 5V power rails.
• Telematics control units needing compact DC-DC conversion.
• Body control modules operating within wide automotive input voltage ranges.
• ADAS sensor interfaces demanding efficient power regulation.

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number including suffixes such as RNXRQ1 to ensure correct packaging and automotive grade. Confirm that the fixed 5V output matches your system requirements, as adjustable variants exist within the same family. Check RoHS compliance status and specific tape-and-reel quantities during ordering. Ensure ESD handling procedures are followed due to the small VQFN-HR package type.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5V output is required for automotive applications. It is suitable for designs needing 1.5A continuous current with minimal footprint. Consider the 4.2V to 42V input range for direct battery connection scenarios. Evaluate thermal performance based on the VQFN-HR package capabilities under expected load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LMR34215-Q1 series of ultra-small synchronous buck converters. It shares architectural similarities with other members like the LMR36015 but offers a fixed 5V output instead of adjustable. The RNXRQ1 suffix indicates the specific reel packaging and automotive qualification level provided by Texas Instruments.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other LMR34215 variants with different output voltages or packages. Cross-reference with LMR36015 if adjustable output is acceptable. Verify pin compatibility and thermal characteristics before replacing with non-TI components.