LM53625AQRNLTQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LM53625AQRNLTQ1 is an automotive-grade synchronous step-down DC-DC converter from Texas Instruments. It delivers a maximum output current of 2.5 A with an input voltage range of 3.9 V to 36 V. The device operates at a fixed switching frequency of 2.1 MHz and features adjustable output voltage. It includes a shutdown function and maintains a typical quiescent current of 6 µA. The component is housed in a 22-pin VQFN-HR package and supports junction temperatures up to 150°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability
• Integrated synchronous rectification for high efficiency
• Fixed 2.1 MHz switching frequency enables compact external component sizing
• Adjustable output voltage with configurable shutdown control

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment systems
• Instrument cluster power distribution
• Body control module (BCM) voltage regulation
• Telematics unit power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'A' against the official datasheet to confirm it denotes the correct temperature grade or marking variant, as TI often uses suffixes for tape-and-reel packaging or specific thermal ratings. Ensure the ordering quantity matches the manufacturer's standard reel size requirements. Cross-reference the 22-VQFN-HR package dimensions with your PCB footprint library to prevent assembly errors during procurement validation.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing for automotive environments requiring high-frequency operation to minimize passive component size. The 2.1 MHz frequency allows for smaller inductors compared to lower-frequency alternatives. Verify that the load current does not exceed 2.5 A continuously. Consider the 150°C junction temperature rating for high-ambient applications where thermal management is critical within the vehicle chassis.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM53625/35-Q1 family of synchronous buck converters designed specifically for automotive applications. It shares architectural similarities with the LM53635 but offers a 2.5 A output current capability. The family is characterized by its ability to operate efficiently across a wide input voltage range while maintaining stability under varying load conditions typical in automotive electrical systems.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The LM536353QRNLTQ1 is a confirmed substitute within the same family, offering 3.5 A output current and identical 2.1 MHz switching frequency. Both parts share the 22-VQFN-HR package and automotive qualification. Verify that the higher current rating of the LM53635 does not necessitate changes to the PCB copper area or thermal design.