LMR36503RSERPERQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LMR36503RSERPERQ1 is an automotive-grade synchronous buck converter from Texas Instruments. It operates with an input voltage range of 3.6 V to 65 V and delivers a maximum output current of 300 mA. The device features a fixed 5 V output and supports adjustable switching frequencies between 200 kHz and 2.2 MHz. It exhibits a low quiescent current of 4 uA and functions within a temperature range of -40°C to +175°C. The component is housed in a compact VQFN-HR-9 package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability in vehicle environments.
• Wide input voltage capability supporting high-voltage automotive bus architectures up to 65 V.
• Integrated synchronous rectification for improved efficiency and reduced external component count.
• Extended thermal performance rated for junction temperatures up to 175°C.

Voltage Regulators - DC DC Switching Regulators Applications

• High-voltage distribution networks in automotive electronic control units
• Step-down conversion for infotainment and body control modules
• Power supply stages for sensors and actuators in electric vehicles

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix RSERPERQ1 against official Texas Instruments documentation to confirm the fixed 5 V output configuration and extended temperature rating. Ensure compatibility with automotive quality requirements by checking for AEC-Q100 certification status in the latest datasheet revision. Confirm package details match the VQFN-HR-9 specification before integration.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing systems requiring robust high-voltage input handling and extended temperature operation. The fixed 5 V output simplifies design for standard logic or peripheral supplies. Consider the 300 mA current limit for moderate load applications. The wide frequency range allows optimization for size versus noise trade-offs.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LMR3650x-Q1 family of ultra-small synchronous step-down converters designed for automotive use. The series offers various output configurations and current ratings, all sharing a common compact footprint and high-voltage input tolerance. The Q1 designation indicates adherence to automotive reliability standards.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Consult the LMR36503-Q1 datasheet for direct pin-compatible alternatives within the same family. Verify that any substitute maintains the 65 V input rating and 175°C operating temperature requirement. Cross-reference package dimensions for mechanical fit.