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Hello Intel community!
I am designing the power solution for an Agilex 7 F-series device and am hoping I can find a little more information pertaining to how exactly the voltage rails turn on.
I have read the support documentation and understand the voltage rails are separated into 3 groups with Group 1 voltage rails needing to be at 90% of their nominal voltage level before you can start turning on Group 2 voltage rails and so forth.
Since there are multiple voltage rails within a single group, is there any timing information or sequencing of voltage rails within a single group? More specifically, I am wondering if there are delays between group 2 voltages: VCCCLK_GXF, VCCH_FGT_GXFR, VCCPLL_HPS, etc.
I have one regulator that is powering multiple group 2 voltage rails. If all of them start drawing current at the same time, the resulting voltage droop will put us below the acceptable voltage minimum. I haven't found anything in the documentation on if these rails within a group will turn-on simultaneously and how they start drawing current once they are up.
Any information or personal experience with the Agilex 7 voltage sequencing would be helpful!
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Hello,
Good day
Thank you for reaching out. I'm Nazrul Naim looking into your issue and allow me some time to look into your issue. I shall come back to you with findings.
Thank you for your patience.
Best Regards,
Nazrul Naim
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Hi,
Sorry for the delay. For your information, all power rails in Group 1 must ramp up (in any order) to a minimum of 90% of their respective nominal voltage before the power rails from Group 2 can start ramping up. The power rails within Group 2 can ramp up in any order after the last power rail in Group 1 ramps to the minimum threshold of 90% of its nominal voltage.
For more information regarding the power sequence of Agilex 7, it can be accessed through the link below.
Link : 3.2. Power-Up Sequence Requirements (intel.com)
Hope that helps and do let me know if I can assist you any further.
Best regards,
Nazrul Naim
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Hello,
As we do not receive any response from you on the previous question/reply/answer that we have provided. Please login to ‘https://supporttickets.intel.com’, view details of the desire request, and post a feed/response within the next 15 days to allow me to continue to support you. After 15 days, this thread will be transitioned to community support. The community users will be able to help you on your follow-up questions.
Best regards,
Nazrul Naim

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