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TPS63060EVM-619: TPS63061DSCR GND and PGND

Gabriel Garza45
Intellectual 2275 points
Part Number: TPS63060EVM-619
Other Parts Discussed in Thread: TPS63060

Hello,

We have a customer asking about the separation of GND and PGND in the EVM layout:

"I noticed that on the TPS63060EVM-619 User's Guide, that in the PCB layout, that GND and PGND are labelled as separate ground planes. As well, I noticed in the PCB layout these are kept separate. However, on page 9, a connection is shown between GND and PGND.

Is it alright for GND and PGND to be connected? Or must they always be separate? Any information would be appreciated."


Could someone please look in to this?

Thanks,

  • 0
    TI__Expert 8420 points

    HI Gabe,

    it is recommended to keep the power ground (PGND) and the analog ground (GND) planes separated but connect them at a start point.

    The reason to keep them separate is because PGND is more noisy than GND and do not want the analog circuitry to be influenced by this noise.

    As shown on  figure 10 of the user's guide , both the grounds are connected separately representing the star point connection.

     For the TPS63060 it is recommended to connect PGND  and GND at  the device between the power pad and GND pin, this is necessary for the device properly .