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Original question:

TPS62097: Negative Spike at SW Node

TPS62097: Spikes at SW

Hao Jie Chan
Intellectual 270 points
Part Number: TPS62097

Hi TI,

I just noticed at no load, the SW will see spikes higher than maximum rating...
Even the screenshot from EVM seems to show the same thing:

So this screenshot is taken from https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/997861/tps62097-negative-spike-at-sw-node
I didn't notice the max rating back then. The max voltage at SW is supposedly Vin+0.3V, so 3.6V (3.3Vin). I am seeing similar spikes at my SW, are these okay?

  • +1
    TI__Expert 7695 points

    Hi Hao,

    Thanks for the additional question.

    The same reasoning of last time is still valid also for positive spikes.

    The high frequency ringing (usually < 10ns) on the SW node is intrinsic of the converter behavior.

    The absolute maximum rating of VIN + 0.3V refers to 'DC' conditions (usually > 10ns).

    If the spikes you see in your application are similar to the ones of the EVM you should not have problems.

    Please ask again if you need further support.

    Thanks,

    Stefano

    All information in this correspondence and in any related correspondence is provided “as is” and “with all faults”, and is subject to TI’s Important Notice (http://www.ti.com/corp/docs/legal/important-notice.shtml).