TPS62823: Short circuit between VIN and VSW

Hi,

We're having some issues with a design with the TPS62823. Before the very first power on of a board, impedances seem to be ok, but after the first power on, a short has developed between the VIN and VSW pins of the TPS62823. I've removed the package from the board, and the short is internal to the IC.

This is our schematic:

Input voltage is 5.1V max.

I believe the routing is fairly close to the recommendations as well:

Any ideas how this failure can occur?

Best regards,

Jørgen