MP2965 AVSBUS supply

DC-DC Power Converters
1

Hi expert,
Would like to learn which pin should I connect AVSBUS supply to, I cannot find such a pin.
Doesn’t MP2965 need an individual and external AVSBUS supply? Because as you can see below there’s AVS_VDDIO pin besides AVSBUS.

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2

Hello dickzsh26,

I apologize for the delayed reply. Could you clarify where you getting that pin out? It looks different from the one we have on our datasheet.

https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MP2965/document_id/5134/

Thank you,
Vinh Tran

3

Hi, vinh
this picture is taken from another company’s multiphase controller supporting AVSBUS.
I have checked PMBUS spec 1.3.1 below, and found it is correct to have individual AVS_VDDIO functions. Also, it is said there’s no need for pull-up resistors.

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Based on these information, could I know that why MPS refers to different designs? it seems conflicts with PMBUS spec 1.3.1. That is my concern.