I'm attempting to switch a resistive DC load (50VDC @ 10 amps) using an N-channel MOSFET.
This is the particular MOSFET I'm considering. https://www.ti.com/lit/ds/symlink/csd18536kcs.pdf
On page 1 there is a plot for Vgs vs Rds(on). I will be powering the gate using a microcontroller GPIO pin at 3.3VDC.
Rds(on) appears to be very large at 3.3V, meaning a lot of heat will need to be dissipated, correct?
In my circuit, I have 7VDC available (regulated down to 3.3VDC for the microcontroller). I was thinking of driving the power MOSFET gate with another MOSFET at 7VDC.
Is this commonplace? Is this there a name for this pairing? Using this pairing, under a watt of power will need to be dissipated as heat, correct?