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http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Flm74701-q1″>View Datasheet
Texas Instruments LM74701-Q1 Ideal Diode Controller is an automotive AEC-Q100 qualified ideal diode controller. It operates with an external N-channel MOSFET as an ideal diode for low loss reverse polarity protection with a 20mV forward voltage drop. LM74701-Q1 is suitable for input protection of 12V automotive systems. The 3.2V input voltage support is particularly well suited for severe cold crank requirements in automotive systems.
The device controls the MOSFET’s GATE to regulate the forward voltage drop at 20mV. The regulation scheme enables graceful turn-off of the MOSFET during a reverse current event and ensures zero DC reverse current flow. Fast response (< 0.75µs) to reverse current blocking makes the device suitable for systems with output voltage holdup requirements during ISO7637 pulse testing and power fail and input micro-short conditions. The LM74701-Q1 has a unique integrated VDS clamp feature that enables users to achieve TVS less input polarity protection solution and save, on average, a typical 60% of PCB space in constrained automotive systems.
The Texas Instruments LM74701-Q1 controller provides a charge pump gate drive for an external N-channel MOSFET. With the enable pin low, the controller is off and draws approximately 1µA of current.
