Added symbol for Intel EN5322QI switching regulator

Created by: luca-della-vedova

Hi all,

I created the symbol for this Intel (former Altera) switching regulator. Please let me know, before merging, if it is OK because there is a few pin compatible versions with slight differences (i.e. different current rating and part number) and I will create aliases for all of them.

Datasheet is here https://www.intel.sg/content/dam/www/programmable/us/en/pdfs/literature/ds/en5322qi_03454.pdf

And screenshot here

It is waiting for a vendor specific footprint, I created it and submitted the pull request that is available here https://github.com/KiCad/kicad-footprints/pull/1407

I'm not 100% sure that the footprint filter is correct (although I don't get any DRCs and it seems to be fine), and about the electrical pin types. Specifically I get a warning from the script about the stacked power output pins that should be marked as power output, however doing so will violate the rules for pin stacking so I went for passive + not visible type. Also I'm not sure if VFB should actually be marked as passive since it would be connected to a voltage divider, but that's about it.

As always, feedback is welcome. Cheers! /Luca

---

All contributions to the kicad library must follow the KiCad library convention

Thanks for creating a pull request to contribute to the KiCad libraries! To speed up integration of your PR, please check the following items:

• Provide a URL to a datasheet for the symbol(s) you are contributing
• An example screenshot image is very helpful
• Ensure that the associated footprints match the official footprint library
  • A new fitting footprint must be submitted if the library does not yet contain one.
• If there are matching footprint PRs, provide link(s) as appropriate
• Check the output of the Travis automated check scripts - fix any errors as required
• Give a reason behind any intentional library convention rule violation.