Do yourself a favor and draw your own symbol and (if necessary) footprint.
You will learn one of the skills necessary to use KiCad. A very fundamental skill!
There are many tutorials on YT how to make your own symbols (if you are unable to read the RTFM).
If, after that, you still have problems, feel free to come back!
Since login is required to download the footprint presumably you can’t share it. So you should either raise the issues with TI via Ultralibrarian, since they claim compatibility with KiCad, or learn to make or adapt your own footprint.
Holy Smokes! If you are not experienced, I do not recommend working with this one. It is not a beginner sort of chip. Have a look at this footprint. It rates a “WOW.”
I do not remember ever seeing a footprint which is this complicated. More pins, probably (though not a power IC; power is what I generally work with.) But not more complicated.
I am reminded of some recent experience with a voltage regulator chip from another manufacturer. It was quite a bit simpler than this one. But with experienced people working on it, we did not get the layout quite right on the first (and maybe second) try and performance issues resulted.
Many thanks to those who took the time to reply.
Nevertheless, the answers surprise me.
What makes you think I’m a beginner?
The fact of putting in a word and sharing with you?
I have over 5 years’ experience with Kicad.
A hundred PCBs to my credit, 60/70% of them in four layers.
5 to 10 % in 8 and 16 layers.
My personal library contains several thousand components, all verified and validated.
That said, this kind of footprint is developing more and more in industrial applications, so before saying anything, it would be useful for us to share together to find solutions for integrating them into our libraries
Signed a small French engineer with only 35 years’ experience who is very happy with Kicad and sends his regards to all our friends the developers.
Apologies, but it does happen a LOT.
In this case the symbol probably has several paralleled pins like SW1,2&3 defined as outputs and KiCad flags this.
I had to send this PCB for prototyping today
I had to find a way around the problem.
Apart from the GND zone which remained in Footprint, the two other zones, created on ultraliberian in polygon and assigned in copper zone without Net of specified.
After several attempts, I was unable to assign a Net to a filled polygon, so I assigned these zones to User Comment in the Footprint.
Then, directly on the PCB, I transformed these user comment zones into plans.
If anyone has a better solution it would be cool to share.
I’ve tried this option and it works, but the symbol no longer corresponds to the component datasheet. I’ve abandoned this solution for our production and after-sales teams.
This is a very similar footprint to Vishay_PowerPAK_MLP44-24L which already exists in the KiCad library (there is also a variant with thermal vias). I only know that because I use the Vishay footprint literally yesterday .
It will be pretty easy to modify it to your required RRX VQFN-29.
Sorry I had the impression that you had not previously made any footprints.
In the case of this footprint, it does seem to be particularly complicated and probably demanding. It looks more complicated than another IC (from another company) where it was particularly challenging to get the layout right. I had only a quick look at this datasheet, but it appears that it is targeted at automotive applications and probably lends itself to a very compact design, given the wide input range.
Gosh, I would not attempt an “eye chart” challenge like that. There are so many footprints where a certain amount of “By guess and by golly” is needed to set all of the dimensions correctly. Very often it seems that there is not quite enough information with which to figure worst case (or min/max) dimensions.
says that you can’t find why footprint is not compatible with symbol and that you not consider to correct footprint yourself (to replace these polygons if there are problems with them). Each of these traits is simply very characteristic of beginners …
If you think that I was digging than (if I understand that word (digging) correct) than in my opinion there were absolutely nothing of this kind in what I said. OP was surprised that he was seen as beginner and asked why it have happened to him. His question seemed to me very serious so he had to not understand why from his first post others got such surprising for him assumption. I just decided to answer his question to explain the situation. I have read this thread today (from beginning) and my impression after first post was also that it is a question asked by beginner.
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