LMS3635MQRNLTQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LMS3635MQRNLTQ1 is a synchronous step-down converter from the LMS3635-Q1 series, manufactured by Texas Instruments. It operates with an input voltage range of 3.9 V to 36 V and delivers an adjustable output voltage starting from 1 V. The device supports a maximum output current of 3.5 A through a single output channel. It features a programmable switching frequency between 250 kHz and 500 kHz. The component is housed in a 22-PowerVFQFN package (22-VQFN-HR) with wettable flanks for enhanced inspection. It is qualified to AEC-Q100 standards and functions within a temperature range of -40°C to 125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Automotive-grade qualification compliant with AEC-Q100 standards for reliability in vehicle environments.
• Synchronous buck topology provides efficient power conversion with integrated high-side and low-side switches.
• Adjustable output voltage allows flexible configuration for various load requirements.
• Programmable switching frequency enables optimization for efficiency or external component size.

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment systems requiring stable power regulation.
• Instrumentation clusters and dashboard displays.
• Body control modules and lighting control units.
• General automotive electronics operating within 12V or 24V nominal bus systems.

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'M' indicates the adjustable output variant when ordering. Confirm the 'Q1' designation ensures automotive grade compliance. Check the 'NR' package code for the 22-VQFN-HR form factor with wettable flanks. Ensure the 'LT' suffix matches the required tape and reel quantity specifications. Cross-reference the full part number against the latest Texas Instruments datasheet to confirm pinout and thermal characteristics.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when an adjustable output voltage is required rather than a fixed rail. The 3.5 A current rating suits moderate load applications compared to higher current variants like the LM53635. Consider the 250-500 kHz frequency range for balancing EMI and passive component size. The 36 V input tolerance accommodates cold load dump conditions common in automotive networks. Verify that the thermal performance of the 22-VQFN-HR package meets the system's heat dissipation needs.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LMS36xx-Q1 family of synchronous buck converters designed for automotive applications. It shares architectural similarities with the LMS3655-Q1 but differs in current capacity and output adjustability. The family emphasizes high efficiency and robust protection features suitable for harsh automotive environments. Other members include fixed-output variants such as the LMS3635NQRNLTQ1.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes within the same family include other LMS3635-Q1 variants with different output configurations, such as the fixed 3.3V version LMS3635NQRNLTQ1. For higher current needs, the LM53635 series offers similar packaging but with increased amperage. Always verify pin compatibility and thermal resistance before swapping parts.