LMQ62440APPQRJRRQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LMQ62440APPQRJRRQ1 is an automotive-grade synchronous step-down DC-DC converter from Texas Instruments. It operates with an input voltage range of 3 V to 36 V and delivers up to 4 A of output current. The device features a fixed switching frequency of 2.1 MHz and supports adjustable output voltages from 1 V to 34.2 V. It includes integrated high-side and low-side MOSFETs, offers a shutdown function, and has a quiescent current of 600 nA. The component is rated for junction temperatures between -40°C and +150°C and is housed in a VQFN-HR-14 package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated bypass capacitor reduces external component count and solution size
• Soft recovery of dropout prevents output overvoltage during transient conditions
• Capable of withstanding 42 V input voltage and 400 ms load dump events

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment systems including audio hosts and media hubs
• Vehicle instrument clusters and display units
• USB chargers within automotive environments
• Advanced Driver Assistance Systems (ADAS)
• General automotive body electronics

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number against official Texas Instruments documentation to ensure correct suffix alignment. Confirm that the specific ordering code matches the required package type and temperature rating. Cross-reference the datasheet revision history to validate functional specifications. Ensure compliance with automotive quality standards such as AEC-Q100 before finalizing procurement decisions.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for designs requiring high integration and robustness against automotive electrical transients. The fixed 2.1 MHz frequency allows for compact passive selection. Verify that the application does not require adjustable switching frequencies, as this variant is fixed. Consider the thermal performance of the VQFN-HR-14 package relative to the expected load current and ambient conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LMQ62440-Q1 family of low-noise synchronous buck converters designed specifically for automotive applications. It shares architectural similarities with other members like the LMQ62440BPPQRJRRQ1 but differs in output configuration. The series emphasizes high efficiency and electromagnetic interference reduction through integrated power stages and optimized control loops.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LMQ62440BPPQRJRRQ1 is a related variant within the same family offering different output voltage configurations.