LM63440AFSQRYFRQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LM63440AFSQRYFRQ1 is an automotive-grade synchronous step-down DC/DC converter from Texas Instruments. It supports a wide input voltage range of 3 V to 36 V and delivers up to 4 A of output current. The device features adjustable switching frequencies from 200 kHz to 2.2 MHz and offers an output voltage range of 1 V to 34.2 V. It operates within a temperature range of -40°C to +150°C, utilizes a VQFN-FCRLF-EP-22 package, and includes a shutdown function with a typical quiescent current of 9 uA.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Automotive qualification for high reliability in vehicle environments
• Integrated low-EMI spread spectrum modulation to reduce noise interference
• Wide input voltage compatibility for diverse power bus architectures

Voltage Regulators - DC DC Switching Regulators Applications

• On-board charger systems in electric vehicles
• Infotainment and display power distribution networks
• ADAS sensor and compute module power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'AFS' against the manufacturer datasheet to confirm the exact temperature grade and material compliance status. Ensure the ordering part number matches the required package variant and tape-and-reel specifications. Cross-reference the component marking code with official identification guides to prevent counterfeit risks during assembly.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when automotive reliability and electromagnetic interference reduction are critical design constraints. The integrated EMI filtering capabilities simplify board layout requirements compared to standard converters. Evaluate the thermal performance within the VQFN package against the expected ambient operating conditions to ensure stable regulation under load.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM634xx family of synchronous buck converters designed specifically for automotive applications. It complements other variants like the LM63440AASQRYFRQ1 by offering specific material or grading options defined by the suffix codes. The family targets high-efficiency power management in demanding vehicular electronic systems.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct pin-compatible alternatives within the same automotive series should be verified via the TI product selection tool. Check for identical package dimensions and electrical characteristics before substitution.