I'm trying to build a circuit which will turn an IC on and off using a MCU signal voltage of 3.3V. This is for a low-power circuit, so every coulomb is critical.
I selected the BSS816NW N-type MOSFET for the job. One can see that Vgs minimum is 1.8V for this FET, which worries me with the following circuit:
One can see that as the chip saturates in voltage, the FET will increase in resistance, which is problematic, as there will always be a voltage drop between the gate and source, which may cause brown-outs for U1.
How can I use simple FETS or BJTs to improve this low-power toggle for U1? There are no other voltage rails besides ground and 3.3V pos.