LMR51435FSQDRRRQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LMR51435FSQDRRRQ1 is an automotive-grade synchronous buck converter from Texas Instruments. It operates with an input voltage range of 4 V to 36 V and delivers a maximum output current of 3.5 A. The device supports adjustable switching frequencies between 200 kHz and 1 MHz, enabling optimization for efficiency or external component size. It features a low quiescent current of 25 uA and supports output voltages from 800 mV to 28 V. Designed for harsh environments, it functions reliably within a junction temperature range of -40°C to +150°C and is housed in a compact WSON-12 package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous rectification for high power conversion efficiency
• Automotive qualification compliant with AEC-Q100 standards
• Adjustable switching frequency allows design flexibility for EMI and component sizing
• Low standby current consumption extends battery life in shutdown modes

Voltage Regulators - DC DC Switching Regulators Applications

• On-board charging (OBC) systems
• DC/DC point-of-load regulation
• Infotainment power distribution
• Instrument cluster power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number including suffixes against official Texas Instruments documentation to ensure correct automotive grade and package configuration. Confirm RoHS compliance status and moisture sensitivity level requirements prior to ordering. Cross-reference datasheet revisions to validate pinout compatibility and electrical specifications for your specific application design.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing automotive DC/DC converters requiring a 36 V input window and up to 3.5 A continuous load. Ensure the thermal design accommodates the WSON-12 package constraints at the target operating temperature. Verify that the required output voltage falls within the 800 mV to 28 V adjustable range and that the switching frequency setting meets system EMI requirements.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LMR514xx family of wide input voltage synchronous buck converters. It shares architectural similarities with other members like the LMR51425 and LMR51450 but is specifically rated for 3.5 A output current. The FSQD suffix indicates the automotive grade variant with enhanced reliability testing and specific packaging suitable for high-volume automotive manufacturing processes.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LMR51425FSQDRRRQ1 offers similar functionality with a lower 2.5 A current rating. LMR51450FNDRRR provides higher current capability but lacks the explicit automotive Q1 designation in standard listings. Verify pin-to-pin compatibility and thermal performance before substituting.