LM74801QDRRRQ1

Overview

The LM74801QDRRRQ1 is an automotive-grade ideal diode controller manufactured by Texas Instruments, designed for active rectification driving external B2B N-channel MOSFETs. It operates within a supply voltage range of 3V to 65V and supports output voltages from 3V to 37.5V. The device features a low quiescent current of 80µA and includes integrated protection mechanisms such as overvoltage, undervoltage, and thermal shutdown. It is housed in a compact 12-SON package and functions reliably across an extended temperature range of -40°C to +125°C.

Feature Summary

• Active rectification capability using external N-channel MOSFETs
• Integrated comprehensive protection against overvoltage, undervoltage, and thermal events
• Low quiescent current consumption for efficient power management
• Automotive qualification ensuring reliability in harsh environments

Applications

• Automotive battery backup systems
• Power distribution units in vehicles
• Hot-swap controllers for automotive modules
• Ideal diode bridging applications

Procurement Notes

Verify the specific ordering suffix to ensure the correct tape-and-reel packaging configuration matches your assembly requirements. Confirm that the component meets the necessary AEC-Q100 standards for your specific automotive application class. Cross-reference the datasheet revision date to ensure compatibility with your design specifications and check for any recent manufacturing changes or notices.

Selection Notes

Select this controller when designing high-efficiency power paths requiring low voltage drop compared to standard Schottky diodes. Ensure the external MOSFET selection aligns with the controller's gate drive capabilities and the expected load current. Consider the thermal performance of the PCB layout given the operating conditions and package size constraints.

Part Context

This component belongs to the LM7480x family of ideal diode controllers from Texas Instruments. It is part of their specialized power management portfolio tailored for automotive electronics. The family offers various packages and configurations to suit different current ratings and board space limitations while maintaining consistent control logic and protection features.

Replacement Considerations

Check for direct pin-to-pin replacements within the LM7480x series, such as the LM74800QDRQRQ1, verifying package and electrical parameter compatibility. Evaluate alternative ideal diode controllers from other manufacturers only if they meet the exact automotive qualification and functional requirements.