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TPS568230: tps568230 pin configuration

MINKYUNG KIM
Expert 1250 points
Part Number: TPS568230

Hello,

I wonder why the package has more than one VIN pin configuration, not only Vin but SW and GND pin as well. Is there any specific function for this configuration? Thank you.

  • 0
    TI__Mastermind 18510 points

    Two main reasons,

    1, helpful for thermal dissipation.

    2, Due to current ability limitation for each pin, more pins needed for high current application.

    Yuchang

  • 0 in reply to Yuchang Zhang
    Expert 1250 points

    Got it. Thank you for reply!

  • 0
    TI__Expert 7500 points

    Hi,

    1. Drawing lots of current (8A) may be impractical on one pin alone. The resistance of the supply wiring must be very low, otherwise there will be a very significant amount lost to heat. 

    2. Multiple ground pins, including the GND thermal pad, are used to ensure more thermal conductivity to the PCB that IC is connected to.

    3. Multiple power lines gives the device multiple avenues to pull power from, which keeps the voltage from dipping as much during high current events. And with pins in reasonable locations, it can reduce crosstalk internally.

    Thanks,

    Lishuang