Oh I just meant is this the IC that blew up that you already replaced, sounds like it is. You're sure it's exactly the same as what was there and not a variation with some different parameters? I'm not familiar with this specific family of part but I've worked with other power management ICs that have multiple slightly different part numbers that have various differences. I suppose you could try swapping in another IC, but I would first try every combination of the configuration lines, then check very carefully all of the parts in the feedback loop and if you haven't already, make sure all of the config lines have continuity all the way back to the IC pin and that none are shorted to each other by a solder bridge, etc. Also I would test it while driving a load, probably best not to use the CPU itself, but maybe a power resistor, shouldn't really matter but it's possible that it doesn't like an open circuit.