Converting 3.3 volts PWM to 10V PWM

Question

I have a 3.3V PWM signal form microcontroller and i want to increase its voltage and current driving capability (at least 10mA source-sink current).

I have designed circuit like on the pic, but a am not quite satisfied how it's works.

To convert voltage level from 3.3V to 10V i have used a simple CS stage. Basing on simulation results i decided to use mos-based push-pull as a output stage (it had much better voltage levels than a bipolar push-pull).

But this design has some flaws:

1. During PWM state change i am getting a short between 10V and GND. For a short period of time both transistors are half open. It is a result of poor slew rate of a CS stage. I could improve it a bit by reducing a R3 resistance value but it would increase power consumption.

2. I am not sure if uP can drive a MOS gate. I could add resistor in series with gate, but it would increase a transition time even further and hence a power rail shorts time.

So, im looking for more handy solution or tips how could i improve my design. Maybe IC drivers exists for such a job?

Answer 1

Try this way, maybe it won't short.

^{simulate this circuit – Schematic created using CircuitLab}

The upper PMOS is capsized, so the built-in intrinsic diode is in conduction mode. You should swap Drain and Source to have a correct orientation.