LTspicePowerSim

Three-level buck — peak current mode

LTspicePowerSim's flying-capacitor buck, its two switch pairs clocked half a period apart under peak current control.

Press Run: the example simulates in your browser. Open and simulate takes it to the full app, where you can change it.

Try this

Take the clamp out: the flying capacitor never charges and the inductor ripple more than doubles. Then press Run again.