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TPS55010: Should Customer do soldering TPS55010's Thermal PAD?

Masaharu Takahashi
Expert 4170 points
Part Number: TPS55010

Hi, Team.

This is MASA.

i've been asked by customer as below.

1.Does customer have to do soldering thermal pad or can it be floating ?

Customer is worried that they make its soldering coverage 50% over so that they want it floating since they believe that there is no concern about thermal in this time.

could you tell me ?

  • 0
    TI__Prodigy 580 points
    Hi Masaharu,

    For this part it is very highly recommended to tie the Power Pad to GND. This is a layout recommendation seen both in the User Guide and Data sheet. Soldering the thermal pad with it shorted to GND is the best grounding scheme for this part, and is recommended for the ground loop as well as thermal performance. This is the layout of record for proper operation.

    Changing the layout from this is not recommended and can cause different performance from that seen in the datasheet. The customer is welcome to test the part with the thermal pad left floating, however the behavior cannot be guaranteed to match the datasheet. All of that data was collected with the recommended layout.
  • 0 in reply to Alec_Heierman
    TI__Expert 4170 points
    Hi, Alec-san.

    I understood.
    in case Customer doesn't care about thermal , they just care about "work properly" .
    in that case, how much is the minimum soldering coverage ?

    I know 50% is recommended by TI for RΘja, how much is it for work properly ?
    is it same as RΘja?
  • 0 in reply to Masaharu Takahashi
    TI__Prodigy 580 points

    Hi Masaharu,

    Yes, please stick with the 50% coverage for the part to work properly. It may be that the threshold is more flexible since thermal is not an issue, but please have them stick with 50% to ensure that the pad has a good connection to GND.