I am trying to control the current to a Raspberry Pi using a MOSFET and an ATtiny10. I am using a logic level MOSFET and it seems that the Pi needs about 250mA to turn on but it is only able to pull 120mA. My power source is 5V 3A. I have the circuit below. Any idea why I am unable to pull enough current to turn on?
NOTE: The answers below about breadboard causing Voltage and Current drops and the Pi rebooting due to over current draw are equally helpful. I accepted the answer that matched the Title question most.