# MOSFET switch, ATtiny10, Raspberry Pi

I had posted a question earlier but I was using a BJT at the time and the solution provided led me to use a MOSFET for my application instead. I switched to the FET but still unable to provide stable Power to my Pi. Is my ATtiny10 pin current too low to drive the Gate of this FET? Is there something wrong with my circuit design? I get at most 120mA to the Pi but my source current is providing 3A.

simulate this circuit – Schematic created using CircuitLab

You're not driving the FET with a high enough voltage. Remember, the threshold voltage $$\V_{th}\$$ is the voltage at which the FET just barely begins to allow current through--not the voltage at which it's fully on. If you look on page 4 of the datasheet:
you'll see that the on-state resistance is specified at a $$\V_{GS}\$$ of 10V, twice what you have. And some of the other specifications are rated at a $$\V_{GS}\$$ of 13V!