TPS61220: TPS61220 ripple on the output

please help to check if the issue also happen in another board. if yes
try to move the C30 closed to the IC. the location and routing of this capacitor could cause this issue.

Dear Jasper, thank you

I looked at the picture of the PCB and saw that the contact 1 of the DA7  is connected to the L10 on the lower layer of the board - can it be worth connecting as I showed the black line? Please see attach "PCB". Check it all I can only on January 8.

TIA

Sincerely

Vladimir Naumenkov

www.agat.by3034.PCB.docx

i think the PIN 1 (VIN) is not the root cause.

i found the board image doesn't match the PCB you share. the distant between the IC and the C30 is longer in the board image.

Dear Jasper, thank you

Perhaps, board image doesn't match the PCB in terms of size. But actually this is the same PCB. 

In the end,  I haveTPS71533  after DA7 - there is no pulsation at the  TPS71533 output.  It is interesting that TPS71533 suppresses pulsations, usually a linear stabilizer does not press such a high frequency!   Load current is 10 mA.

Sincerely

Vladimir Naumenkov

www.agat.by