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UCD90240EVM: Malfunctioning Switching

Part Number: UCD90240EVM

Hello

I currently have the UCD90240 Evaluation board malfunctioning for the GPS ETPA test bench. When a 5 Vdc is applied to the board as specified, the board would turn on and off erratically. I suspect either the 3.3V voltage regulator near the DC input is broken or the actual UCD90240 IC is broken. We have additional UCD90240 IC for replacing if that is the case.

Another problem is the General-Purpose Input/Output (GPIO) pins we use to turn on/off sequence stop working, so we’d have to move onto the next pin until it dies. The GPIO pin which dies either maintain a HIGH signal or LOW but does not respond to the 5V DC input signal we assert.

Thanks,

Ben