TPS54020: TPS54020

user4727740

Part Number: TPS54020

Dear

I use TPS54020 from 12V to 1V, Please help me check the schematic which refer to the attachment.thanks a lot.SCHEMATIC1 19-PS (CPU&MISC).pdf

over 6 years ago

0 Gerold Dhanabalan - High Performance Radar over 6 years ago

TI__Genius 14455 points

Hi,

Did you use WEBENCH to create the design? If so can you please share the WEBENCH design link here. It will help with the review.

Regards,

Gerold

0 Gerold Dhanabalan - High Performance Radar over 6 years ago in reply to Gerold Dhanabalan - High Performance Radar

TI__Genius 14455 points

Hi,

also providing the below information will definitely help.

Regards,

Gerold

DESIGN PARAMETER	MIN	TYP	MAX	UNIT
Input voltage				V
Input voltage ripple				V
Vout (DC)				V
Max Load current				A
Vout DC Tolerance				mV or %
Vout ripple tolerance				mV or %
Vout transient (undershoot /overshoot) tolerance				mV or %
Transient Load step size (ΔI)				A
Switching frequency				kHz

0 Anthony F over 6 years ago in reply to Gerold Dhanabalan - High Performance Radar

TI__Mastermind 35205 points

Hi,

I looked at the schematic and there are no obvious mistakes.

How was the output capacitance and the compensation values selected? It looks like the compensation values were copied directly from the schematic in the datasheet. This may or may not work but I think the compensation will likely need to be adjusted to cancel out the ESR zero of the 470 µF cap.

WEBENCH or the equations in the datasheet can be used to select the compensation values. The details Gerold is requesting may be necessary to select the right values.

Anthony

0 Gerold Dhanabalan - High Performance Radar over 6 years ago in reply to Anthony F

TI__Genius 14455 points

Hi,

Can you please let us know if you need further support? Else, we will go ahead and close this ticket.

regards,

Gerold

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TPS54020: TPS54020