Switching p-ch mosfet with 5V

Hey,

my goal is to achieve an on/off switchable 12V voltage source meant for supplying some power mosfet gates out of 60V, controlled by a TTL output pin of a Attiny4, 85 or something like that.
This is my first approach, it's a n- and a p-channel mosfet switching a 12V zener diode.
Because the voltage is 60V I limited Vgs of the p-channel mosfet with a 12V zener diode but because of this only 12V out of the 60V drop at R8 and therefore a high current will flow through the n-channel mosfet, how is the right way to fix that? Should I just put an resistor in there?

Thanks!

Diagram #4 on this page might work.
The drive transistor is used as constant current source sink.
Leo..

Can we see a schematic? TTL/5V, 12V, 60V, what???

Hi,
Welcome to the forum.

Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html then look down to item #7 about how to post your code.
It will be formatted in a scrolling window that makes it easier to read.

Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png?

Thanks.. Tom.. :slight_smile: