LMQ66410MC3RXBRQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LMQ66410MC3RXBRQ1 is an automotive-grade, low-EMI synchronous step-down converter from Texas Instruments. It operates with an input voltage range of 2.7 V to 36 V and delivers a maximum output current of 1 A. The device features a fixed 3.3 V output option in this specific suffix configuration, though the series supports adjustable outputs. It includes a shutdown function and maintains a typical quiescent current of 1.5 µA. The switching frequency is adjustable between 200 kHz and 2200 kHz. It is housed in a compact 14-pin VQFN-FCRLF package (RXB) rated for operating temperatures from -40°C to +150°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for high reliability in vehicle environments.
• Low electromagnetic interference design utilizing spread-spectrum frequency modulation to reduce EMI peaks.
• Wide input voltage capability supporting direct connection to 12-V or 24-V automotive battery systems.
• Integrated synchronous rectification for improved efficiency across various load conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Infotainment system power distribution
• Telematics control unit regulation
• Body control module (BCM) power supplies
• Sensor interface circuitry powering

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number including the MC3 suffix to confirm the fixed 3.3 V output variant. Ensure the RXB package designation matches your PCB footprint requirements. Confirm RoHS compliance status through the manufacturer's official documentation before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when automotive reliability and low EMI are critical constraints. The wide input range accommodates cold crank and load dump scenarios common in automotive networks. Consider the thermal performance of the exposed pad VQFN package for high ambient temperature applications requiring sustained 1-A loads.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LMQ664xx-Q1 family of automotive buck converters. It shares architectural similarities with other members like the LMQ66410MA3RXBRQ1 but differs in output configuration and specific electrical characteristics defined by the ordering suffix. The family targets compact power solutions for space-constrained automotive electronics.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct pin-to-pin replacements within the same family include variants with different output voltages such as LMQ66410MA3RXBRQ1. Verify that the substitute part meets the same AEC-Q100 grade and thermal specifications. Cross-reference datasheets to ensure compatibility with existing feedback network components if adjusting output voltage.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum operating junction temperature for this component?

The device is rated for a maximum operating temperature of +150°C, suitable for harsh automotive under-hood environments.

Does this specific part number support adjustable output voltage?

No, the MC3 suffix indicates a fixed 3.3 V output version. Adjustable versions typically carry different suffixes within the LMQ66410 series.

How does the device manage electromagnetic interference?

It employs spread-spectrum frequency modulation to distribute energy across frequencies, thereby reducing peak EMI emissions without external filtering.