LM61440AANQRJRRQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LM61440AANQRJRRQ1 is an automotive-grade synchronous step-down converter featuring a 3-V to 36-V input range and 4-A output current capability. It utilizes a buck topology with a switchable frequency between 200 kHz and 2.2 MHz, achieving up to 98% maximum duty cycle. The device regulates outputs from 1 V to 34 V while maintaining low quiescent current of 600 nA. Operating within a temperature range of -40°C to +150°C, it is housed in a VQFN-HR-14 package suitable for surface mount applications.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous rectification for high efficiency in compact designs
• Wide input voltage range supporting direct conversion from common automotive rails
• Configurable switching frequency allows optimization for size or noise performance
• Low quiescent current minimizes power consumption during standby modes

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment systems requiring stable low-noise power
• Telematics control units needing wide input tolerance
• Body control modules utilizing high-efficiency DC-DC conversion
• ADAS sensor power supplies demanding precise voltage regulation

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix QRJRRQ1 confirms the specific automotive qualification and tape-and-reel packaging configuration. Ensure compatibility with AEC-Q100 standards if required by your system design. Confirm the VQFN-HR-14 footprint matches your PCB layout constraints before ordering. Cross-reference the datasheet revision date to ensure all electrical characteristics align with your simulation models.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing for automotive environments requiring robust input voltage handling up to 36 V. The 4-A output rating suits moderate load applications without excessive thermal management needs. Consider the adjustable frequency feature to mitigate EMI issues in sensitive radio frequency zones. The low shutdown current makes it ideal for battery-backed systems requiring minimal drain during sleep states.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM61440 family of low-noise synchronous buck converters designed for automotive reliability. It shares architectural similarities with the LM62440 but offers specific optimizations for electromagnetic interference reduction. The Q1 designation indicates compliance with automotive quality and reliability standards, distinguishing it from commercial grade variants in the same series.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM61440AASQRJRRQ1 offers a different pinout configuration requiring schematic review. LMQ62440APPQRJRRQ1 provides similar electrical performance with potentially different thermal characteristics. Verify pin-to-pin compatibility and control loop stability before substituting any alternative devices.