LM53635MQRNLTQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LM53635MQRNLTQ1 is a synchronous step-down DC/DC converter from Texas Instruments, designed for automotive applications. It features an input voltage range of 3.9 V to 36 V and delivers up to 3.5 A of output current. The device operates with a fixed switching frequency of 2.1 MHz, enabling the use of small external components. It provides a fixed 5 V output in a 22-pin VQFN-HR package. Key electrical specifications include a maximum operating junction temperature of 150°C and a quiescent current of 6 µA. The component is AEC-Q100 qualified for automotive reliability.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous buck topology for high efficiency
• Fixed 2.1 MHz switching frequency for compact design
• Automotive grade qualification ensuring reliability
• Wide input voltage range supporting various bus architectures

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment systems
• Instrument cluster power distribution
• Telematics control units
• Body control modules

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'M' indicates the fixed 5V output variant when ordering. Confirm the 'TQ1' suffix denotes automotive grade and tape-and-reel packaging. Ensure compatibility with the 22-VQFN-HR footprint during PCB layout. Cross-reference the manufacturer datasheet for latest assembly and handling guidelines. Validate that the required output voltage matches the fixed internal setting.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5V rail is required at 3.5A in automotive environments. The 2.1 MHz frequency allows for smaller inductors compared to lower-frequency alternatives. Consider the 150°C junction temperature rating for high-thermal applications. Compare against adjustable variants if flexible output voltages are needed instead of fixed options.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM53635-Q1 family of wide input voltage synchronous buck converters. It shares the same core architecture and pinout with other variants in the series, differing primarily in output voltage configuration and thermal grading. The family is designed to replace older generation regulators in space-constrained automotive designs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM536355QRNLTQ1: Fixed 5V output variant with identical electrical characteristics and package. LM536353QRNLTQ1: Fixed 3.3V output variant; verify voltage requirement difference. LMS3635MQRNLTQ1: Adjustable output version; note different switching frequency range.