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TPS53353: TPS53353 the start up ripple is too large.

Frank Xiao

Genius 12055 points

Part Number: TPS53353
Other Parts Discussed in Thread: TPS548D22,

Hi team,

My customer is using the TPS53353 now, the start up ripple is too large.( current setting is FCCM). We find the ripple here is caused by skip mode(DCM). Current TPS53353 may not solve the problem. How about using TPS548D22 to solve the problem? Thanks.

FCCM

DCM

over 5 years ago

0 Gerold Dhanabalan - Online Design Tools over 5 years ago

TI__Genius 14455 points

Hi Frank,

What are the two signals that you have shown in the snapshots?

What is your input/output requirement and we might be able to suggest a better part.

Regards,

Gerold

0 Frank Xiao over 5 years ago in reply to Gerold Dhanabalan - Online Design Tools

TI__Genius 12055 points

Hi Gerold,

The yellow is Vout, the blue is EN, thanks.

Input is 12v, output 5V, the load current is 12A. How about TPS548D22? this device is in the customer's device library. Thanks.

0 Gerold Dhanabalan - Online Design Tools over 5 years ago in reply to Frank Xiao

TI__Genius 14455 points

Hi Frank,

I am sending you an email to follow up on this.

Regards,

Gerold

0 Frank Xiao over 5 years ago in reply to Gerold Dhanabalan - Online Design Tools

TI__Genius 12055 points

The blue one is the power good signal. Thanks.

0 Gerold Dhanabalan - Online Design Tools over 5 years ago in reply to Frank Xiao

TI__Genius 14455 points

Hi Frank,

I am closing the ticket here as we are talking over email.

regards,

Gerold