Hello,
One of my customers is having trouble with a P/N: TPS63060DSCR, a buck boost part set to 3.3V output, that they have designed into a board. They are seeing the part fail if they connect it to a 12 volt supply. If they connect it to 5 volts or so, it works and they can than ramp the voltage on a bench supply up to 12 volts and all is good. They're using the demo board for reference. It can be connected to 12 volt supply with the enable on at power up and it works. They have noticed that the demo board has a 100uF cap on the input that is not called out in the specification sheet as necessary. They have removed the 100uF cap and are left with the specifications recommended input capacitance of about 20uF. The regulator fails if connected to 12 Volts with the enable on (attached to Vin) at power on time. If the 12 volts is applied with the enable low, regulator off, and then enabled it works and does not fail.
They've used the demo board and caused the same failure when they removed 100uF cap and changed output to 3.3V by adjusting feedback divider - 100K and 560K. Please advise.
