LMR36503MSCQRPERQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LMR36503MSCQRPERQ1 is an automotive-grade synchronous step-down DC/DC converter from Texas Instruments. It operates with an input voltage range of 3 V to 65 V and delivers a maximum output current of 300 mA. The device features an adjustable output voltage starting from 1 V, integrated within a compact 9-pin VQFN-HR package measuring 2x2 mm. Key electrical specifications include a fixed switching frequency of 2.2 MHz and a quiescent current of 4 µA. It supports operation across an extended temperature range from -40°C to +150°C and holds AEC-Q100 qualification for automotive reliability.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-side and low-side power switches enable efficient synchronous rectification in a minimal footprint.
• Fixed 2.2 MHz switching frequency allows for the use of small external inductors and capacitors.
• Extended junction temperature rating supports operation in demanding thermal environments up to 150°C.
• Automotive qualification ensures compliance with AEC-Q100 standards for long-term reliability.

Voltage Regulators - DC DC Switching Regulators Applications

• Battery-powered automotive systems requiring wide input voltage tolerance
• Infotainment and instrument cluster power distribution networks
• ADAS sensor modules and camera interface power supplies
• Body control module (BCM) auxiliary power rails

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'MSC' confirms the specific pin configuration and internal circuitry variant required for your design. Ensure the ordering part number matches the exact package type and temperature grade specified in your schematic. Cross-reference the datasheet revision date to confirm compatibility with your manufacturing process requirements.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a wide input voltage range up to 65 V is necessary alongside a compact solution size. The fixed 2.2 MHz frequency is optimal for minimizing passive component volume compared to lower-frequency alternatives. Consider the 300 mA output limit against your peak load requirements to ensure adequate headroom without derating issues.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LMR3650x-Q1 family of ultra-small automotive buck converters. It shares architectural similarities with other members like the LMR36506-Q1 but differs in output current capability and specific pinout configurations defined by the suffix codes. The family targets applications where space constraints and automotive durability are primary design drivers.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LMR36503MSC5RPERQ1 serves as a direct functional substitute within the same series, offering identical electrical performance and pinout compatibility for automotive designs requiring equivalent voltage and current specifications.