Hi Reginal, When you are turning on the TPL0102 supply after the TPS supply, you are violating the absolute maximum ratings of the TPL0102: When the ratings for any pin is violated, the ESD diodes in the device will conduct to the VDD (or VSS) supply. The supplies for both devices should be turned on at the same time, or the devices should use the same supply. Best, Katlynne Jones
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