after i weld AD5520 on my pcbboard, the current of 5V power supply comes with a high current(over 400mA). Then I get it off the board and connect it pin3 to 5V and pin 17 to DGND. The high current comes again. I bought 7 chips and 6 of them comes with this problem. I have had successfully applied AD5520 on the same board before. Did I bought the fake one or something i have done wrong?