Hello helpful guys :)
I am thinking of powering on a 5V device that connects to me 3.3V micro. The micro talks to the device using usb (so device supply is 5V).
I have a 12V to 5.0V SMPS chip that supplies the usb device and from that 5V I am going to use 3.3V regulator chip to drive my UC3 micro controller. I want to be able to power cycle the 5V supply to the USB device so I am thinking of a mosfet like facility...
It would be good to be able to place the switch on the high side that way the USB device ground is at the same ground as the microcontroller.