LM536355QRNLTQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LM536355QRNLTQ1 is a synchronous step-down DC/DC converter from Texas Instruments, designed for automotive applications with AEC-Q100 qualification. It operates within an input voltage range of 3.9 V to 36 V and provides a fixed 5 V output at up to 3.5 A. The device integrates internal high-side and low-side MOSFETs and supports a switching frequency of 2.1 MHz. Key electrical parameters include a quiescent current of 6 uA and an operating junction temperature range from -40°C to +150°C. It is housed in a 22-pin VQFN-HR package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous buck topology with internal power switches
• Automotive-grade reliability certified under AEC-Q100 standards
• High thermal performance supporting extended junction temperatures

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment systems
• Telematics control units
• Body electronics modules

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number including suffixes against official Texas Instruments documentation to ensure correct package, temperature grade, and tape/reel specifications. Confirm AEC-Q100 certification status and RoHS compliance requirements prior to ordering. Cross-reference datasheet revisions to validate pinout and electrical characteristics match design intent.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5 V output is required for automotive loads drawing up to 3.5 A. The wide input voltage range accommodates standard 12 V and 24 V automotive battery systems. Ensure PCB layout supports the 2.1 MHz switching frequency and thermal dissipation needs for the VQFN-HR package.

Voltage Regulators - DC DC Switching Regulators Part Context

This regulator belongs to the LM53635-Q1 family of high-efficiency synchronous buck converters. The family offers various output configurations and packages tailored for space-constrained automotive designs. The LM536355 variant specifically provides a fixed 5 V output, distinguishing it from adjustable or other fixed voltage options within the series.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Consult the LM53635-Q1 datasheet for direct pin-compatible alternatives within the same family. Verify that substitute parts maintain identical automotive qualification and thermal performance metrics.