# Good MOSFET for high-side switching 200mA from 5V logic [closed]

I want to switch the power on/off to the WIFI module using an IO pin of a microcontroller, peak current is 200mA, average current 100mA. Which MOSFET(part number) should I use?

simulate this circuit – Schematic created using CircuitLab

## closed as unclear what you're asking by Matt Young, Gustavo Litovsky, Nick Alexeev♦, Dave Tweed♦, Anindo GhoshSep 28 '13 at 21:30

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

• Bob. Oh. A PMOSFET. – Ignacio Vazquez-Abrams Sep 28 '13 at 8:49
• You might look at the parts specifically marketed for switching USB VBus – Chris Stratton Sep 28 '13 at 19:48

You need a p channel mosfet with source tied to incoming power and drain connected to the output. Pulling the gate low will activate the FET, returning the gate to 5V will deactivate the fet but make sure you get one with $V_{GS(threshold)}$ quite low - maybe about -1V typical and -2V max.