TPS54620: Output current ripple

Leo Lin3

Part Number: TPS54620

As we measured output current after inductor.

and VIN=12V , VOUT=1.5V.

There is large current ripple and current becomes more negative when start up.

Waveform as below.

Is there any information about it except for pulse-skip behavior?

And is there any solution to reduce current ripple?

Thank you

Hi Leo,

Here is an article that talks about minimizing output ripple during startup.

The negative current during startup is because the device does not have light load mode of operation and operates in FCCM.

Regards,

Gerold

0 Anthony F over 5 years ago in reply to Gerold Dhanabalan - Online Design Tools

Hi Leo,

Do you have any details why the current ripple needs to be reduced?

0 Anthony F over 5 years ago in reply to Anthony F

Hi Leo,

I am going to mark this as resolved. If you have any further questions please post again to this thread to re-open it.

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