LMS3655AMRNLT

Voltage Regulators - DC DC Switching Regulators Overview

The LMS3655AMRNLT is a synchronous step-down DC-DC converter from Texas Instruments, designed for automotive applications under the AEC-Q100 qualification. It features a fixed 400-kHz switching frequency and supports an input voltage range of 3.9 V to 36 V. The device delivers up to 5.5 A of output current with adjustable output voltages ranging from 1 V to 6 V. Packaged in a 22-pin VQFN-HR (VQFN-HR-22) surface-mount package, it operates within a temperature range of -40°C to +125°C. Key electrical characteristics include a quiescent current of 32 µA.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated pseudo-random spread spectrum modulation to minimize switch node ringing and reduce electromagnetic interference.
• Synchronous buck topology optimized for high efficiency and low noise performance in compact designs.
• Automotive-grade reliability certified to AEC-Q100 standards for robust operation in harsh environments.

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment systems requiring stable power delivery
• Digital cockpit and instrument cluster power distribution
• ADAS sensor modules needing low-noise regulation

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'AMRNLT' against the official datasheet to confirm the exact package type, tape-and-reel quantity, and temperature grade. Ensure compatibility with your PCB footprint for the 22-pin VQFN-HR package. Cross-reference the manufacturer's latest documentation for any product change notices or lifecycle status updates before finalizing procurement plans.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing automotive power stages that require a balance of high current capability and low electromagnetic interference. The fixed 400-kHz frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the 36-V input tolerance for systems subject to load dump conditions. Verify thermal management requirements given the 5.5-A output capacity in the specified package.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LMS3655 family of synchronous step-down converters. It shares functional similarities with other members like the LMS3655MQEVM evaluation board counterpart but differs in packaging and specific automotive qualification details. The family is characterized by its integrated EMI reduction features and high efficiency.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult Texas Instruments documentation for potential pin-compatible or functionally equivalent alternatives within the same product family.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum input voltage supported by the LMS3655AMRNLT?

The device supports a maximum input voltage of 36 V.

Does the LMS3655AMRNLT include EMI reduction features?

Yes, it includes pseudo-random spread spectrum modulation to minimize switch node ringing and reduce electromagnetic interference.