LM53635NQURNLRQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LM53635NQURNLRQ1 is a synchronous step-down DC-DC converter from Texas Instruments, designed for automotive applications. It features a fixed output voltage of 3.3 V and delivers an output current of 3.5 A. The device operates with an input voltage range of 3.9 V to 36 V and utilizes a fixed switching frequency of 2.1 MHz. It is housed in a 22-pin VQFN-HR package (RNL) and supports junction temperatures from -40°C to +150°C. Key electrical parameters include a quiescent current of 6 uA and an operating supply current of 18 uA. The component is AEC-Q100 qualified.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous buck topology optimized for high efficiency in automotive environments
• Integrated wettable flank leads for enhanced solder joint inspection reliability
• Fixed 2.1 MHz switching frequency enabling compact external component sizing
• Automotive grade qualification ensuring robustness under extreme thermal conditions

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment system power distribution
• Telematics control unit voltage regulation
• Body control module power supplies
• ADAS sensor interface power conditioning

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number including suffixes such as RNL and Q1 to ensure correct package type and automotive grade. Confirm that the specific ordering code matches the required output voltage configuration. Check datasheet revisions for any updates to recommended operating conditions or pin assignments before finalizing procurement specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3 V output at 3.5 A is required in space-constrained automotive designs. The 2.1 MHz frequency allows for smaller inductors compared to lower-frequency alternatives. Ensure input voltage stays within the 3.9 V to 36 V range. Consider thermal performance in the VQFN-HR package if ambient temperatures approach the upper limit of the operating range.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM53635-Q1 family of synchronous buck converters. It shares architectural similarities with other members like the LM53625-Q1 but differs in output current capabilities and switching frequencies. The family is characterized by its small footprint and high efficiency, targeting modern automotive electronic control units requiring reliable power management.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include LM53635NQURNLRQ1 variants with different output voltages or packaging options. Cross-reference with LM53625-Q1 series parts if lower current requirements allow. Verify pin compatibility and thermal characteristics when replacing with non-TI components.