LMS36353QRNLTQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LMS36353QRNLTQ1 is a synchronous step-down DC/DC converter from Texas Instruments, designed for automotive applications. It features a fixed 3.3V output with a maximum current of 3.5A. The device operates within an input voltage range of 3.9V to 36V and supports switching frequencies between 250kHz and 500kHz. It utilizes a 22-PowerVFQFN package and meets AEC-Q100 qualification standards. The component functions across a temperature range of -40°C to 125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous buck topology for efficient power conversion
• Automotive-grade reliability with AEC-Q100 certification
• Integrated shutdown functionality for power management

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive electronic control units (ECUs)
• Infotainment system power distribution
• Sensor node power regulation in vehicles

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix '3' indicates the fixed 3.3V output variant when ordering. Confirm that the VQFN-HR-22 package matches the target PCB footprint requirements. Ensure the procurement channel sources genuine Texas Instruments components to maintain AEC-Q100 compliance. Check datasheet revisions for any updates regarding thermal performance or pinout definitions prior to final design integration.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this model when a fixed 3.3V rail is required at up to 3.5A in automotive environments. Compare against adjustable variants if flexible output voltages are needed. Consider the 250kHz to 500kHz frequency range for balancing efficiency and external component size. Verify input voltage stability does not exceed the 36V maximum limit during load dump conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LMS3635 family of synchronous buck converters. It shares the same package and core architecture with other variants like the LMS3635MQRNLTQ1 (adjustable) and LMS3635NQRNLTQ1 (fixed 3.3V). The family targets high-current automotive applications requiring robust thermal performance and compact footprints.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include LM536355QRNLTQ1 for higher frequency operation or LMS36553QRNLTQ1 for increased current capacity. Verify compatibility with existing passive components due to potential differences in switching frequency and control loop characteristics.