I need the Teensy to switch power on/off for a few system components drawing less than 200mA @ 3.3V total. Can I drive a MOSFET like the DMG3406L directly from a Teensy digital pin? I am thinking it will need a series resistor to limit current but not sure.
Ah, I had the wrong MOSFET specified, for this high side switch the circuit would be:
View attachment 25976
As long as the digital HIGH and the Vdd supply voltage are the same (3.3V) this should be OK as described in BaldEngineer article, right?
Also I am wondering what happens when the Teensy goes into deep sleep or hibernate, do the digital pins float? What will that do to this switch? I need the power to stay OFF when the Teensy is in deep sleep/hibernate.
Thanks for the help!