Tool/software:
Good day,
I will be using the DP83867IS Ethernet PHY in the three-supply configuration, with VDDIO = 1.8V.
The datasheet states the following regarding power sequencing:
When operating in three-supply mode, the 1.8V VDDA1P8 supply must be stable within 25ms of the 2.5V VDDA2P5 supply ramping up. There is no sequencing requirement for other supplies when operating in threesupply mode.
If the 2.5V power supply provides power to DP83867 devices only, the 1.8V supply can ramp up any time before 2.5V.
Am I thus correct in saying that all the supplies can come up simultaneously if the 2.5V is only used to supply the PHYs? If this is not the case, what is the recommended sequence?
Kind regards,
Nicole
