We do not recommend connecting multiple regulator outputs in parallel, though if it is possible for you to split the load so several smaller regulators could power each part separately, that would be okay. You can find more details about why paralleling regulators can be problematic in this forum thread:
However, we just released this power ORing module:
You could use three of those on six supplies and wire the outputs directly together to get six-way power ORing.
