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  • Resolved

TPS54202: Over shoot in case of startup

Part Number: TPS54202

Hi all

Would you mind if we ask TPS54202?

Our customer's condition are follows;
<Condtions>
Vin : 12V
Vout : 5V
Iout : 100mA

On the our customer's circuit, after start up, it occurs overshoot, Vout is more than 5.15 for an instant.
Please refer to the attachment file.
20180928_TPS54202.pdf

So, we would like to check it using TPS54202EVM, however we don't have this EVM.
If you have the figure of start up with follow condtions, could you share it? 
Vin : 12V
Vout : 5V
Iout : 100mA

We would like to use this data to judge whether the the customer board has some problem or not.
(We assume that the cause of a problem is parasitic inductance or pulse skip mode.)

Kind regards,

Hirotaka Matsumoto

  • Hi,

    The waveform is very strange, could you please share the schematic? Need to check whether there is problem on the schematic. 

    Best Regards,

    Shawn

  • In reply to Shawn Nie:

    Shawan san

    Thank you for your reply.
    We would like to the circuit and the layout using private messsage on E2E because the circuit and the layout contain confidential information.
    So, could you accept the request?

    Kind regards,

    Hirotaka Matsumoto

  • In reply to Shawn Nie:

    Shawan san

    We sent you circuit and layout using private message on E2E.

    Kind regards,

    Hirotaka Matsumoto

  • In reply to Shawn Nie:

    Shawn san

    We assume that your days are so busy, however could you give us the update?

    Kind regards,

    Hirotaka Matsumoto

  • In reply to Hirotaka Matsumoto:

    Hi,

    Sorry for the delay, it is Chinese National Day for the past week. Please see my reply by private message.

    Shawn
  • In reply to Shawn Nie:

    Shawn san

    Thank you so much for our cooperation always!
    We encouraged the customer that there is no problem about TPS54202 EVM.
    So, we assume that the the problem depends on customer's constant and board layout. 

    The customer accepted our suggestions.
    We appreciate your help!

    Kind regards,

    Hirotaka Matsumoto

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