TPS53353: Using TPS53353 with switching noise at en_low

Feng bin Su

Part Number: TPS53353

Hi team,

My customer is using TPS53353 and they have doubt about the switching noise since enable pin off as below figure.

The switching noise is about 330kHz. Is it the normal behavior of TPS53353?

If not, may I know the possibility reason? Thanks.

Hi Feng,

When the converter is off, the output should be quite. Can you please check the customer's layout?

Also, please check if the output is measured with a oscilloscope with proper grounding (use a tip and barrel method).

Also, is the converter's output voltage proper when the converter is turned on?

Regards,

Gerold

Hi Feng,

Here is the layout checklist attached. Please use that to check if your board layout is good.

Regards,

Gerold

Hi Feng,

Were you able to check the layout? Can you please answer the questions that I had?

regards,

Gerold

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