I225 Ethernet Controller VDD Power Supplies

[Ed11]

The latest version of the I225 Ethernet Controller datasheet (596659), revision 2.6.5, has tightened the tolerances for the VDD_*** power supplies. These now need to be 0.95V +/-5%.

The VDD_CTRL pin continues to be available to provide a 0.95V rail with a worst case tolerance of 10%.

However, the latest version of the I225 reference schematic (576602), revision 2.7, shows that the I225 VDD_*** power inputs can be driven from the VDD_CTRL pin via an inductor and capacitors. Does the datasheet mismatch in tolerance specifications not matter?

[Crisselle_Intel]

Hello Ed11, 

Thank you for posting in Intel Ethernet Communities. 

Can you confirm if you are designing/customizing your own board with the Intel® Ethernet Controller I225? If no, please share your configuration or how do you use the Intel® Ethernet Controller I225?

Awaiting to your reply. 

We will follow up after 3 business days in case we don't hear from you. 

Best regards,

Crisselle C.

Intel® Customer Support 

[Ed11]

Hi,

I am designing my own board and am using an I225 device. I have been following the guidance provided in Intel document 576602 to connect the VDD_CTRL pin to the VDD_*** power inputs. I would like to be sure that apparent tolerance mismatch in the recently updated I225 Ethernet Controller datasheet (596659), revision 2.6.5, does not invalidate this design strategy.

Thanks

Ed

[Crisselle_Intel]

Hello Ed,

Thank you for the swift response. 

Since your query involves customized board, please be informed that this will be best answered by our Embedded Connectivity Support team. We will help you to move this post to the designated team for further assistance. Please feel free to contact us if you need assistance from Ethernet support team.

Have a good day and stay safe!

Best regards,

Crisselle C.

Intel® Customer Support

[CarlosAM_INTEL]

Hello, @Ed11:

Thank you for contacting Intel Embedded Community.

We sent an email to the address associated with this account with information that may help you.

Best regards,

@CarlosAM_INTEL.