I just got a PCB in I designed from fab, and I quickly discovered I made a mistake in the design. I'm using a P-channel MOSFET, D2PAK, as a high-side switch.
Its pinout is (1) gate, (2) drain, (3) source, but I laid it out as if it was (1) gate, (2) source, (3) drain. As it stands, the fully assembled PCBs conduct whether the gate is driven or not via the body diode.
What can I do?
I don't see any MOSFETs with the pinout that I used, so I don't see a way to replace the component to fix the problem. I also don't see a good way to reorient the package in a way that would make for a clean install and a sale-able product.