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HDFN-12 #2353

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@cmcquinn cmcquinn commented Jul 7, 2020

Add HDFN-12 footprint for Microchip MIC33050-4YHL. Footprint from land pattern on page 16 of datasheet. Matching symbol is included in PR KiCad/kicad-symbols#2847.

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CLAassistant commented Jul 7, 2020 •
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@cmcquinn cmcquinn mentioned this pull request Jul 7, 2020
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@myfreescalewebpage myfreescalewebpage added Addition Adds new footprint to library Pending reviewer A pull request waiting for a reviewer labels Jul 15, 2020
@cpresser cpresser self-assigned this Aug 23, 2020
@cpresser cpresser removed the Pending reviewer A pull request waiting for a reviewer label Aug 23, 2020
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Hi and thanks for you contribution.
I did a quick check (no full review) and have a few questions:

This is what I see in the data-sheet:
image
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I do not quite understand how this is supposed to work. Why are there pads that are not electrically or thermally connected to anything? What was microchip thinking when making that recommended land pattern drawing?
I would rather assume that pads 4,5,6 and the small strip should be one copper plane, but with 4 explicit paste pads. The same for the other island.

For the lulz, this is what ultra librarian thinks this should look like.
image

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There seems to be an eval board from micrel where I found this potato-quality top-copper-layout:
http://ww1.microchip.com/downloads/en/DeviceDoc/MIC33050-4YHL%20Evaluation%20Board%20User%20Guide.pdf
image

One can see that there are big copper islands that connect the pins together.

@cpresser cpresser added the Question Issue: request for clarification or support, PR: There is an open question (by author or maintainer) label Aug 23, 2020
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@cmcquinn ping are you still working on this ?

@myfreescalewebpage myfreescalewebpage added the Abandoned Original author has stopped working on the PR label Sep 28, 2020
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No news of the author, indicate this is Abandoned

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