Help needed with low side drive mosfet based buck converter

[Swagata Dutta]

I wanted to ask if the this circuit is all right for a buck converter.

 

[Swagata Dutta]

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i have attached the circuit diagram.My doubt is whether the loacation of mosfet as low side drive will affect the switching on of diode in the buck converter circuit.

 

[FvM]

The circuit works as a buck converter but has serious disadavantages:
- no common ground between in- and output
- high frequent AC voltage between in- and output (can be avoided by shifting the inductor to the negative branch)

 

[Swagata Dutta]

Thanks a lot FVM.I shifted the inductor.Successfully implemented the buck converter as well as a feedback network that allows the duty cycle to be auto adjusted in order to maintain constant output even if supply is varied(increased or decreased).