Hi Frank,

Yes, I did. I think that ticket means: "the input and output shall have a smooth relation".
I reviewed my code, I "feel" they are, but can not be 100% sure due to many switching behavior of DC-DC itself.

However, i think the "smooth behavior" requirement is conditional because I have done switching cap amp and chopper amp model. The way I describe it is obviously not "smooth" but they work on PSS/PSTB.

I have to find a new job so i am not in a mood to work these days.  >:(
Here is the model I build.
This picture show my top level testbench.
The inductor is 22uH and the load cap is 20~47uF.
The compensation use a 10nF external cap on the output of the gm style EA.

So this is a simple Voltage mode control.
And, here is the pack of all verilogA code.

it would be good to hear your advise so I can make this work.

Thanks.