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TPS40210: Data sheet does not show an electrical connection for the thermal pad.

Naser S.
Genius 11605 points
Part Number: TPS40210

The TPS40210 data sheet does not show an electrical connection for the thermal pad. In the sample circuit, it is shown grounded. I wonder if requires neither?

Customer would like to run this part without the thermal pad. It won't be for long. He plans to use the HKK version later, but want to work out the bugs first with the cheaper part before placing the high $ on to the board. So - if it's okay, can he run without the thermal pad connected? Thanks.

  • 0
    TI__Mastermind 21720 points
    Hi Naser,

    It is highly recommended to ground the thermal pad. Not only does it help with thermal dissipation but it also help reduce the effect of any noise that might impact the IC. I would not recommend running the TPS40210 without the thermal pad connected to ground.

    Thanks,

    Garrett
  • 0 in reply to Garrett Roecker
    TI__Genius 11605 points

    HI Garrett: Thanks for the reply. see below reply from customer. Please let me know your feedback. Thanks. NS

    I have dual-footprint the MSOP10 and the much larger HKK part. The MSOP is only going to be used until I can prove out the design, at which time, the MSOP will be removed.

    The dual footprint has the MSOP inside of the HKK footprint. Unfortunately, one signal has to squeeze into the space where the MSOP is placed. The best I'll be able to do is just add a ground connection to a small area of the pad. It won't do any good as a thermal relief.

    Technically, it sounds like the thermal pad is NOT required to have electrical connection to ground...is that true? Is the pad floating, or does it have electrical connection to the ground pin within the IC?