LMR33620CQRNXRQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LMR33620CQRNXRQ1 is an automotive-grade synchronous step-down voltage converter from Texas Instruments. It operates with an input voltage range of 3.8 V to 36 V and delivers a maximum output current of 2 A. The device features adjustable output voltages between 1 V and 24 V, or fixed options such as 5 V in specific variants. It utilizes peak current-mode control with switch frequencies of 400 kHz, 1.4 MHz, or 2.1 MHz. Packaged in a 12-pin VQFN-HR (3 mm × 2 mm) with wettable flanks, it supports junction temperatures from -40°C to +125°C and complies with AEC-Q100 standards.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• AEC-Q100 qualified for Grade 1 automotive applications with extended temperature range support
• Integrated power MOSFETs with low on-resistance for high efficiency across load ranges
• Ultra-low EMI design capabilities through frequency dithering and spread spectrum techniques
• Comprehensive protection including thermal shutdown, input UVLO, cycle-by-cycle current limit, and hiccup mode

Voltage Regulators - DC DC Switching Regulators Applications

• Infotainment systems and instrument clusters
• USB charging ports in vehicle networks
• Telematics control units
• Body control modules requiring robust DC-DC conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'Q1' confirms AEC-Q100 automotive qualification and Grade 1 temperature rating. Ensure the middle character indicates the correct switch frequency option (e.g., 'Q' for 2.1 MHz). Confirm package type matches the required PCB layout constraints for the 12-VQFN-HR form factor. Check RoHS compliance status against regional regulations. Validate that the specific variant aligns with the intended fixed or adjustable output voltage requirement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing for automotive environments requiring high reliability and wide input voltage tolerance. Consider the available switching frequencies to balance efficiency against external component size. Evaluate the need for ultra-low EMI if the application is sensitive to radio interference. Compare static current consumption against battery-powered standby requirements. Ensure the thermal performance of the VQFN-HR package suits the expected ambient conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LMR33620 family of SIMPLE SWITCHER converters, designed for compact power solutions. It shares architectural similarities with other LMR series devices but offers specific automotive certifications. The family emphasizes ease of design using WEBENCH tools and integrated compensation networks. It targets applications needing small footprints without sacrificing transient response or efficiency.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LMR33620CQRNXTQ1: Pin-compatible alternative with potentially different switching frequency options. LMR33620AQ5RNXTQ1: Fixed 5V output variant within the same automotive family. LMR33630CQRNXRQ1: Higher current (3A) version with similar packaging and automotive qualifications.