MATLAB: How to use an Op Amp with models from SimPowerSystems and integrate the circuit

Question

I am working on a compensation based buck converter design which needs simulations. I need to use SimPowerSystems blocks like RLC element, Power Mosfet, Power Diode. Additionally I need to use an Op Amp which is not a SimPowerSystems blockset. I do not need to isolate this circuit because the Power Electronics components are not going to be operated at high voltages. I am intending this for low voltage applications (~ 5V ) hence there should be no issues with the Op Amp voltage wise.

Answer 1