Hi,
I have one question related with Power supply sequence in three-supply mode on DP83867IR.
According to datasheet, we can find "When operating in three-supply mode, the 1.8-V VDDA1P8 supply must be stable within 25 ms of the 2.5-V VDDA2P5 supply ramping up." Also, on another E2E thread, if 1.8V is earlier power-up than 2.5V, it is possible to flow current from 1.8V line to 2.5V line. This situation is not so good.
So I have one question. 2.5V_line starts ramping up before 1.8V_line, and voltage of 2.5V_line never exceed voltage of 1.8V_line, but 1.8V is faster stable than 2.5V line within 25ms. Is it no issue? Please advise us.
Thanks and best regards,
M.HATTORI.