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LMZ31707 Ground Pins (AGND and PGND)

Other Parts Discussed in Thread: LMZ31707

Hello TI,

I have a question about the LMZ31707 grounds. Looking at the datasheet, it shows two separate grounds, AGND and PGND. The schematics show them always separate. In the “layout considerations” section of the datasheet, it states “keep AGND and PGND separate from one another”. The Figures in that section, Figures 43-46, have detailed layouts, but I don’t see any connection between AGND and PGND. I’ve never seen a chip where a ground is supposed to remain floating. Where (on the layout) is the best place to make the connection between AGND and PGND?

Thanks,

Dan