Hi!
We recently reworked a few LMZ10501SE parts that had failed with LMZ10501SH parts, and yesterday we had a puzzling failure.
It was reworked last week as a 5V/3.3V and yesterday the board died. When we measured there was a 1.4 ohm resistance between 3.3V and GND (same failure symptoms that we had with LMZ10501SE parts).
Furthermore, the epoxy coating wasn’t present and there was some debris surrounding the part, which led us to believe that the epoxy fell off, probably due to overheating. We haven’t found the epoxy, yet.
Have you seen this problem before and do you know under what conditions it might happen?
Thanks!
Andres