I am designing a Jetson tx1 carrier board for a car vision systems. I understand there is a power on and off sequencing circuit for the safe operation. I refer the hardware from Jetson_tx1 Developer_Kit Carrier Board Design Files_B04. In Page 27 of DC Jack sub circuit, there is a mosfet Q30, I cannot figure out its function and why and how it works?
Could any give me a clue? Any help will be most appreciated.