aklaib
Posts: 2
Joined: Sat Jul 07, 2018 12:32 am

Missing Capacitor C56

Sat Jul 07, 2018 12:37 am

Hi,

As I was working with the Compute Module 3, I noticed that a capacitor was lop-sided. It seemed like it was barely attached. As I was inspecting it, the capacitor fell off the board and I can't seem to find it anymore. The capacitor is labeled "C56" on the silkscreen and was originally on the back of the board.

Does anyone happen to know the specs of this capacitor or its purpose?

Thanks in advance!
--Andy

John Westlake
Posts: 55
Joined: Thu Nov 09, 2017 4:34 am

Re: Missing Capacitor C56

Sat Jul 07, 2018 6:01 pm

I believe U5 and U6 are 1.2V LDO regulators:-

RT9081A-12GQZA

https://www.richtek.com/assets/product_ ... 81A-00.pdf

C56 is a 1uF (I'd guess 4V (Could be 6.3V) X5R 1005).

1005 = 0402 :)

C56 is used to decouple the 1.8V input to the LDO.

aklaib
Posts: 2
Joined: Sat Jul 07, 2018 12:32 am

Re: Missing Capacitor C56

Wed Jul 11, 2018 7:10 am

All righty, Thanks for the info! :)
--Andy

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