LMT86: Layout Guidelines of SC70

Toshio Katsura

Part Number: LMT86

Tool/software:

In LMT86 datasheet, there is a Layout Guidelines as following fig.

In my understanding, the optimal connection order from a low-noise perspective is: IC's VCC pin → decoupling capacitor → via → VCC layer.
However, your recommendation seems to reverse the order of the capacitor and the via.
Could you please clarify the reasoning behind this approach?

4 days ago

0 Alex Thompson 3 days ago

TI__Genius 11885 points

Toshio,

You are correct in your understanding, the bypass capacitor should be as close as possible to the LMT86 without vias in between. I think this layout drawing is misleading in that aspect. I am not sure how much a difference it will make but I would have the via to the power plane come after the bypass cap connects to the VDD pin, not before. I will look into if our team can update this drawing.

Thank you

-Alex Thompson

0 Toshio Katsura 3 days ago in reply to Alex Thompson

Prodigy 180 points

Dear Alex,

Thank you for your reply and advises.
My question was cleared.
We are appreciated your help.
Thank you so much.

BR

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LMT86: Layout Guidelines of SC70