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BQ25101: Land pattern design - "Non-solder mask defined" for DSBGA and X2SON

Florian H
Prodigy 30 points
Part Number: BQ25101

Hi team,

In a new product we have design a schematic with BQ25101YFP (DSBGA) and TPS7A2033PYCJR (DSBGA).

Our manufacturer is wondering about the best land patterne design to apply, especially concerning the solder mask.

Indeed in BQ25101YFP, you recommend "Non-solder mask defined" in the datasheet (which is preferred by our manufacturer) ; but in the TPS7A2033PYCJR, you recommend "Solder mask defined" .

Can you please explain why your recommandation are different ?

BQ25101YFP datasheet extract:

TPS7A2033PYCJR datasheet extract:

In addition, concerning the X2SON version (TPS7A2033PDQNR), you also recommend "Solder mask defined", do you think it is possible to do "Non-solder mask defined" ?

Thank you,

Florian

  • 0
    TI__Mastermind 20220 points

    Hi Florian, since the question is regarding on TPS7A2033PYCJR. I am redirecting your thread to the LDO team.

  • 0 in reply to Jing Zou
    TI__Genius 12511 points

    Hi Florian,

    I will talk to the team to see if our layout standards changed and/or any considerations that would make the application of these two parts different.

    As for your second question, we recommended to use solder mask defined, as with a device of this size, there are concerns with shorts between the pins if non-solder mask defined is used that is why we recommend solder mask defined.

    As a customer you may do as you'd like in your solder profiles, but for a package of this size, TI recommends using a solder mask defined layout for the board.

    Regards,

    John

  • +1 in reply to John Schneider
    TI__Genius 12511 points

    Hi Florian,

    There is a different pitch between the devices, additionally, the LDO team has decided for a majority of our devices, we recommend solder mask defined, this is so the pin has maximum contact with the metal on the PCB allowing for imperfections in the soldering process for the devices. Both are acceptable configurations for the land pattern, however we recommend using a solder mask defined for our devices.

    Regards,

    John

  • 0 in reply to John Schneider
    Prodigy 30 points

    Hi John,

    Thank you for the reply. I forward this answer and will take it into account.

    Regards,

    Florian