WEBENCH® Tools/LM25011: Webench does not allow Iout minimum to be specified

Part Number:LM25011

Tool/software: WEBENCH® Design Tools

I used Webench to design a 14-18V to 12 V switcher at .350 ma output. It is an incredible tool. I have a DC motor load that is on for only 20 seconds at a time.

1) How does the regulator behave with a dynamic load? I know this is complicated, but any way to estimate if damage can be done to the regulator and overshoot in response?

2) If a minimum load is needed, doesn't seem I can specify thru Webench, though other forms on the TI site allow minimum current to be specified for regulator designs.

Thanks,

Robert