• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 62 subscribers
  • Views 362 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS62140 EVM layout - GND shape under Switch node

malli arjun1
Intellectual 610 points
Other Parts Discussed in Thread: TPS62140, TPS53353, TPS54620

Hi,

We are using TPS62140 in one of our designs. We have seen TPS62140 EVM for layout reference. In that copper in all layers under SW node(Inductor 's other end) is removed.

what is the significance of it. We have not removed the copper shape under SW node. Is that OK?

Pages 14-16 give the layout details.

  • 0
    TI__Intellectual 2415 points
    Hi Malli,

    the removed cooper shape under SW node is used to show that there should be keep out area to avoid routing any traces(signals) under the SW node.
    The SW node is operating with high dv/dt and noise can be coupled to another traces/signals routed under SW node.

    I recommend to follow layout recommendation for VOS pin according to the datasheet.
    Do you have more devices (TPS62140 or another part number) on the PCB?

    Best regards

    Lubomir Fenic
  • 0 in reply to Lubomir
    Intellectual 610 points

    Hi Lubomir,

    Thanks for the reply.

    We are using few other regulators like TPS54620, TPS53353 etc. No EVM of these regulators has done the SW keep out area like this. Is there any specific recommendation for TPS62140. It is running at Higher Switching frequency 2.5Mhz. Is this the reason?

  • 0 in reply to malli arjun1
    TI__Intellectual 2415 points
    Hi Malli,

    there is no specific recommendation TPS62140.
    General recommendation is to avoid using area under inductor and SW node for routing traces.

    I recommend to follow layout example of TPS62140.

    Best regards

    Lubomir