LM74910QRGERQ1

Overview

The LM74910QRGERQ1 is an automotive-grade N+1 ORing controller designed for high-availability power systems. It operates with a supply voltage range of 3V to 65V and draws a typical supply current of 635 µA. The device supports a 1:1 input-to-output ratio and utilizes external N-channel FETs, as it contains no internal switch. It is housed in a 24-VQFN (4x4 mm) package with wettable flanks for enhanced inspection reliability. Qualified under AEC-Q100 standards, it functions within a temperature range of -40°C to 125°C.

Feature Summary

• N+1 ORing controller architecture for redundant power distribution
• Supports external N-channel MOSFETs for ideal diode emulation
• Wettable flank package design facilitates automated optical inspection
• Automotive qualification compliant with AEC-Q100 standards

Applications

• N+1 redundant power supply architectures
• High-availability automotive electronic control units
• Power distribution modules requiring fault isolation

Procurement Notes

Verify the specific ordering suffix matches the required tape-and-reel quantity and packaging variant. Confirm that the AEC-Q100 qualification grade aligns with the target automotive application requirements. Ensure the 24-VQFN footprint dimensions are compatible with the intended PCB layout constraints before finalizing procurement orders.

Selection Notes

Select this component when designing redundant power systems requiring precise load sharing among multiple sources. It is suitable for applications needing low quiescent current and robust fault protection using external power switches. Consider the 65V maximum supply voltage limit and the requirement for external N-channel FETs during circuit design.

Part Context

This part belongs to the LM749x0-Q1 family of ideal diode controllers from Texas Instruments. These devices are engineered to replace traditional Schottky diodes, reducing conduction losses and improving system efficiency. The family includes variants tailored for different channel configurations and voltage ranges within automotive power management ecosystems.

Replacement Considerations

Consult the official LM749x0-Q1 datasheet for confirmed substitute part numbers within the same product family. Verify pin compatibility and electrical specifications before substituting with other ORing controllers.