LMR33620CQ3RNXRQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LMR33620CQ3RNXRQ1 is an automotive-grade synchronous step-down DC/DC converter from Texas Instruments. It operates with an input voltage range of 3.8 V to 36 V and delivers a fixed output voltage of 3 V at up to 2 A. The device features a 2.1 MHz switching frequency, adjustable output capability within the family, and ultra-low quiescent current of 25 uA. Packaged in a 12-pin VQFN-HR (3x2 mm) for compact designs, it supports operation from -40°C to +125°C junction temperature and holds AEC-Q100 qualification.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Automotive-grade reliability certified under AEC-Q100 standards
• Integrated high-side and low-side N-channel MOSFETs for efficient power conversion
• Fixed 3 V output configuration optimized for specific load requirements
• Compact thermal performance enabled by exposed pad VQFN-HR package

Voltage Regulators - DC DC Switching Regulators Applications

• Infotainment system power distribution
• Instrument cluster voltage regulation
• Body control module power supplies
• Telematics unit biasing

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'Q1' confirms AEC-Q100 automotive qualification status. Confirm the 'CQ3' designation matches the required 3 V fixed output voltage. Ensure the 'RNXR' suffix corresponds to the correct VQFN-HR-12 tape and reel packaging format. Cross-reference the manufacturer part number against official TI databases to validate authenticity and current production status.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3 V output is required for automotive applications. The 2 A current capacity suits moderate load scenarios. The 2.1 MHz frequency allows for smaller passive components compared to lower-frequency alternatives. Verify that the 36 V maximum input voltage aligns with the system's supply rails and transient conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LMR33620-Q1 family of SIMPLE SWITCHER converters. It shares the core topology and pinout with other variants in the series, differing primarily in output voltage settings and specific suffix designations. The family targets space-constrained automotive electronics requiring high efficiency and wide input voltage ranges.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LMR33620CQ5RNXRQ1 offers a similar form factor but provides a fixed 5 V output instead of 3 V.