LMQ66410MA3RXBRQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LMQ66410MA3RXBRQ1 is an automotive-grade synchronous buck converter from the LMQ66410 series, designed for low-EMI applications. It features a wide input voltage range of 3 V to 36 V with support for 42 V load dump transients. The device delivers a regulated 3.3 V output at up to 1 A. Key electrical parameters include a typical no-load current of 1.5 µA in auto mode and a fixed switching frequency of 400 kHz. It operates within a junction temperature range of -40°C to +150°C and utilizes a VQFN-FCRLF-EP-14 package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Dual Random Spread Spectrum (DRSS) technology minimizes peak electromagnetic interference radiation.
• Enhanced HotRod QFN package design reduces switch node ringing and allows for minimized input filter size.
• NC pins between critical high-voltage nodes improve reliability by mitigating potential failure modes.
• Seamless transition between PWM and PFM modes ensures high efficiency across the entire load range.

Voltage Regulators - DC DC Switching Regulators Applications

• Radar Electronic Control Units (ECUs) for Advanced Driver Assistance Systems
• Infotainment systems including audio hosts and eCall modules
• Dashboard instrument clusters
• Body electronics and lighting control systems

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix MA3RXBRQ1 against the manufacturer's official datasheet to confirm the exact output voltage, pin configuration, and thermal rating. Ensure the component meets AEC-Q100 Grade 1 requirements for your target operating temperature range. Cross-reference the package marking code with the latest TI documentation to prevent counterfeit substitution during assembly.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing for automotive environments requiring strict low-EMI compliance and extended junction temperature capability up to 150°C. It is suitable for applications needing a wide input voltage range down to 3 V for cold cranking support. Consider alternative models within the LMR664x0 family if higher output current or different switching frequencies are required for specific noise constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the Texas Instruments LMQ66410 series, which is specifically engineered for automotive power management. The series emphasizes compact design through integrated compensation and low external component counts. It complements other TI automotive PMICs by providing efficient step-down conversion for sensitive digital loads in harsh electrical environments.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LMQ66410MA3RXRQ1: Verify if the 'B' suffix indicates a specific tape-and-reel packaging variation or manufacturing lot difference rather than a functional change.

Voltage Regulators - DC DC Switching Regulators FAQ

Does the LMQ66410 support 42V load dump events?

Yes, the device is designed to support 42V automotive load dump transients, making it suitable for direct connection to vehicle battery lines under transient conditions.

How does the device achieve low EMI performance?

It employs Dual Random Spread Spectrum (DRSS) to lower peak radiated emissions and uses an enhanced HotRod QFN package to minimize switch node ringing.