DP83867IR: DP83867

Hi,

VDDA1P8 is optional for lower power consumption, please refer to this app-note for more details:

https://www.ti.com/lit/an/snla241/snla241.pdf

moshe FRID said:

can i use only 2.5V and 1V LDO and share it for 2 chips side by side - DP83867

If the LDOs are not supplying any other devices in systems aside from DP83867, this is okay. There is back-powering expected on VDDA_2P5 pin, so this rail should only be used to supply DP83867:

https://e2e.ti.com/support/interface-group/interface/f/interface-forum/1396478/faq-dp83867e-dp83869hm-expected-back-powering-on-power-supply-pins

Thank you,

Evan