I built a power supply following the schematic generated by webench, but it draws a very high current from source and blows up almost instantaneously when switched on. It must be something very obvious, but I can't see it at the moment. Any help debugging the circuit would be very much appreciated.
The schematic from webench (designed for Vin 22.6 to 26.4, Iout = 3A) is this one:
And this is mine
And this is the relevant part of the layout. For testing the regulator output is disconnected from its load.
Here is a picture of the board, the red circle marks the spot where (I believe) the IC broke and smoked. I checked with a multimeter and there are no obvious short circuits.
What can be so wrong? Thank you for helping