Hi there - I'm working on a high side FET driver for a 1MHz boost converter. The simulation of it looks... OK. Not as bad as it could be, but certainly not good.
I've attached a picture of the simulation for those without LTSpice, and I've also included the simulation files for those with LTSpice. All you have to do is extract the files in the zip to one directory.
The concept was that Q1 is acting as a low current level shifter, Q4 is putting a reasonable gain on Q1's current, then Q2/Q3 are the push pull stage driving the gate of the FET. Unfortunately - to get it to even kind of work - I had to make R5 and R6 really small, so it's completely not working how I'd like.
Any suggestions as to how to speed this up while lowering power consumption on the 12V line? The 12V supply, even though it's shown powering the load, will actually be a diode-capacitor charge pump/boost circuit. So it will be very low power.