Hi Team,
1)
The datasheet shows Absolute Maximum Rating for VDDIO is up to "LDO_3V3 + 0.3".
So I believe VDDIO shouldn't be supplied until LDO_3V3 outputs (LDO_3V3 is enabled).
I assume VDDIO isn't tied to LDO_3V3 in this case.
Is my understanding correct?
2)
TPS65986EVM shows VDDIO is connected to VIN_3V3.
Is it no ploblem in terms of power-up sequence?
Best Regards,
Yaita / Japan disty
Hello Yaita,
1) Based on the Datasheet, LDO_3V3 and VDDIO are tied together, and serve the same function. It is just a secondary input, which a user can control to see which one is used for I/O's. I cannot find anything that explains when one should be supplied over another and when they are disconnected from one another
2) Based on what I have read, I do not see any potential problems in regards to power-up sequence.
Let me know if this answers your questions or not! If so, please click This resolved my issue
