I see from the datasheet that there's auto phase adding/shedding functions to improve light-load efficiency. As I understand it is only designed for steady-state operation, and Fig40/41 shows phase transition period when load changes, as you know it's impossible for instant output current feedback sensing, phase adding/shedding must have de-glitch time to execute.
My question is, when dynamic load happens, e.g. 1A to 15A, it's impossible for only original one phase to handle such high current load-step up, is there any non-linear feature inside to quickly add all 4 phases at the same time? And how is the behavior, I mean turn on 4 phases totally overlap(miss interleaving) or still interleaving? It is better to explain if you have waveforms tested for it.
Thanks for your help.