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TPS7A8300 / about Cout cap on EVM

Tsukui Yusuke
Guru 21930 points
Other Parts Discussed in Thread: TPS7A8300EVM-209, TPS7A8300EVM-579, TPS7A8300

Hi,

Could you tell me about Cout cap on TPS7A83000 EVM?
This device there are two types of EVM.
TPS7A8300EVM-209 suggests the use of Tantalum cap.
However, Tantalum cap has been removed from TPS7A8300EVM-579.
Why is this?
Data sheet recommends ceramic cap.

Customer is considering the use of tantalum cap.
Can you give me some advice?

TPS7A8300EVM difference.pdf

Best Regards,
Yusuke / Japan Disty

  • 0
    TI__Guru 55940 points
    Hi Yusuke-san,

    TPS7A8300 is ceramic stable as you mention. We recommend X7R, X5R, and COG-rated dielectric materials because of the stability across temperature; however, other types of capacitors may be used so long as they fulfill the requirements stated in the datasheet. Ultimately what capacitor(s) are used is up to the customer as the specific application will impact capacitor selection. We recommend testing the circuit before implementing and offer EVMs so that a customer can try out various capacitors.

    Both EVMs have pads in place for different physical sized capacitors to be tested. On both EVMs several pads are not populated and are placed so that various capacitors and capacitor combinations can be tested. In the case of TPS7A8300EVM-209, the tantalum capacitors you comment are are not populated as ceramic capacitors are widely used and are more commonly selected.

    Very Respectfully,
    Ryan
  • 0 in reply to Ryan Eslinger
    Guru 21930 points

     Hi Ryan-san,

    Thank you for your information and support.
    I inform a customer of it.
    Let me ask you one more thing.
    Customer want to add a capacitor in order to increase the load response.
    How can I add capacitance?

    Thanks
    Best Regards,
    Yusuke/Japan Disty

  • 0 in reply to Tsukui Yusuke
    TI__Guru 55940 points
    Hi Yusuke-san,

    The EVM has multiple pads for output capacitors that can be used. You can also generate your own board to accommodate more capacitor pads.

    Very Respectfully,
    Ryan