Hi,
I have a design using this device and I'm following the design to a T, yet I'm getting 12V showing up on VOUT and causing everything to pop. The only thing I can think of is that Cin is not right next to Vin. Note that the person testing this after two boards failed did not hook up Cout. Is there any reason why this should fail? Note that only the buck and C1 were installed and EN was shorted to Vin. Vin is nominally 12V.
If the input voltage comes up slowly, Vout is quite low and the device gets extremely hot. I'd swear the device was installed backwards or something, but his pictures clearly show the dot where pin 1 should be and everything looks good.
When everything was installed properly and EN was pulled low, he saw +12V on the output. This was with both C1 and C2 installed. After testing, he also saw +5 shorted to ground, but this was not the case before powering it up.
