LM2596 Power Supply

[znroot]

Hello,
I have made a bench power supply with the LM2596-ADJ IC.
All seem to be ok (capacitors, inductor and feedback voltage) but the IC don't want to step down: regardless of the feedback voltage provided by resistors, the output voltage is about 35V with an input of 37V (the maximum allowed I think)
There is no short circuit and my microcontroller circuit (powered by an LM2574-5V fixed regulator) works well.
The PCB isn't home made and electrically checked.
I attach the schematic of the circuit.
Thanks a lot
PS: the jumper is close, I put it to future changes

[Vancata]

I'm just curious can you get the ~1.23v on the output with this LM2596 and 37v in the input and what current you can draw on the output with 1.23v? Guess the TJ will be mad too, cant open any datesheet here lol... my adobe crashed or something.

[znroot]

Yes! Now it works!!! Pin 1 and 2 were swapped.
Thanks a lot
The minimum output is about 1.99V. I haven't made test yet about current at output but I will put an heatsink on the ic...