LMS36355QRNLRQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LMS36355QRNLRQ1 is a synchronous step-down DC/DC converter from the LMS3635x-Q1 family, designed for automotive applications. It features an input voltage range of 3.9 V to 36 V and delivers a fixed 5 V output at up to 3.5 A. The device operates with a switching frequency of 2.1 MHz and includes integrated synchronous rectification. It is housed in a 22-pin VQFN-HR package (4x5 mm) and supports junction temperatures up to 150°C. Certified to AEC-Q100 standards, it offers low quiescent current and comprehensive protection features including overcurrent and thermal shutdown.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous rectification for high efficiency across load ranges
• Fixed 5 V output configuration simplifying design for standard logic rails
• High operating junction temperature capability up to 150°C for robust automotive reliability
• AEC-Q100 qualified for use in demanding automotive electronic systems

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment system power distribution
• Body control module (BCM) voltage regulation
• Telematics unit power supply
• ADAS sensor interface power conditioning

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number against the manufacturer datasheet to ensure correct suffix alignment. Confirm that the specific ordering code matches the required package variant and tape-and-reel quantity specifications. Cross-reference the AEC-Q100 grade requirements with your vehicle's functional safety standards before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5 V rail is required from a wide automotive input range. The 2.1 MHz frequency allows for smaller passive components compared to lower-frequency alternatives. Ensure the PCB layout accommodates the VQFN-HR package thermal pad requirements for optimal heat dissipation at full 3.5 A load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LMS3635x-Q1 series of high-efficiency synchronous buck converters. It shares architectural similarities with the LMS3655x-Q1 but differs in switching frequency and output current capabilities. The series is targeted at replacing linear regulators in automotive applications to reduce heat generation and improve overall system power efficiency.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct replacements include LM536355QRNLTQ1 for similar performance with potential pin-compatible variations. LMS36555QRNLRQ1 offers higher current capacity but different switching characteristics. Verify pinout compatibility and thermal performance before substituting.