TI LM74701QDDFRQ1

The LM74701-Q1 is an ideal diode controller compliant with the automotive AEC Q100 standard. It works in conjunction with an external N-channel MOSFET and can function as an ideal diode to achieve low-loss reverse polarity protection with a 20mV forward voltage drop. The LM74701-Q1 is suitable for providing input protection for 12V automotive systems. Its 3.2V input voltage support meets the stringent cold-start requirements of automotive systems. This device regulates the forward voltage drop to 20mV by controlling the gate of the MOSFET. This regulation scheme supports the smooth turn-off of the MOSFET during reverse current events and ensures zero DC reverse current. The device can respond rapidly (<0.75μs) to reverse current blocking, making it suitable for systems that require maintaining the output voltage during ISO7637 pulse tests, as well as in power failure and input micro-short circuit conditions. The LM74701-Q1 features a unique integrated VDS clamping characteristic, which helps users implement a TVS-free input polarity protection solution and saves an average of 60% (typical) of PCB space in constrained automotive systems. The LM74701-Q1 controller provides a charge pump gate driver for the external N-channel MOSFET. When the enable pin is at a low level, the controller turns off and consumes approximately 1μA of current.

• AEC-Q100 qualified with the following characteristics
• Device temperature grade 1: –40°C to +125°C ambient operating temperature range
• Device HBM ESD classification level 2
• Device CDM ESD classification level C4B
• 3.2V to 65V input range (3.9V startup)
• –33V reverse voltage rating
• Charge pump for external N-channel MOSFET
• 20mV anode-to-cathode forward voltage drop regulation
• 1μA shutdown current (EN = low)
• 80μA operating quiescent current (EN = high)
• 2A peak gate turn-off current
• Fast response reverse current blocking: <0.75μs
• Integrated battery voltage monitoring switch (SW)
• Compliant with automotive ISO7637 transient requirements without additional input TVS diode (TVS-free)
• 2.90mm×1.60mm 8-pin SOT-23 package

• Automotive ADAS systems – cameras
• Automotive infotainment systems – audio head units, telematics control units
• Automotive USB hubs
• Active ORing for redundant power supplies