MOSFET based switch for high voltages

I'm struggling with the design of a MOSFET based switch for high input voltages.
See schematic of the basic circuit that I've come up with:

simulate this circuit – Schematic created using CircuitLab

When M3 would be ON, the voltage on it's drain would be approximately 0. This also means that M2 Vgs ~= (-50)V, exceeding the AMR for this MOSFET.

MOSFETs can't sustain this kind of high voltage on Vgs... What could be an appropriate solution for this?

• Did you mean to make M3 a P-channel, and M2 an N-channel? – Phil Frost Aug 14 '13 at 11:09
• @Phil Frost: Yes – dor Aug 15 '13 at 8:47

Try a 10k$\Omega$ resistor and also make R2 about 10k$\Omega$. Now you only get 25V on the gate. If that is too much make R2 smaller like 3k3 - now you'll only get 12.4V on the gate.
And if you need the same circuit to run from a 15V supply, leave R2 as 100k$\Omega$ and put a 12V zener across it, cathode to positive rail.