Hi everyone

I designed a buck converter circuit that steps down from 12V to 6V. I tested the circuit in Proteus and it works. I'm using a Trudyo development board, which contains a PIC18F45K50 microcontroller. I set the PWM duty cycle to 50%. However, the circuit doesn't work in reality. I replaced the 1-ohm resistor with a 1k-ohm resistor. Can you tell me where my mistake might be?

 

Did you measure pulses between GS of mosfet?

 

Did you measure pulses between GS of mosfet?

Yes i did. I can see 8v from 12v without installing the mosfet driver. I can only observe a decrease in the buck circuit

 

What did you use for L1?

 

Changing the load from 1 to 1000 Ohms likely puts the operation in discontinuous mode.

 

I can see 8v from 12v

I don't understand. What is the G-S voltage? Is it 12V for off and 8V for on?
This is a P-FET? Source on +12V? That gate driver was designed for driving N-FETs. Try a "N".
You have the Gate driver connected from G to D not G to S. Mostfets are controlled by the voltage from G to S.
Do you need to ground the micro?

Either change to a different Gate Driver or use a N MOSFET.