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TPS544C20: EVM, VOUT voltage drop, adding capacitane

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Part Number:TPS544C20

Hello,

 

I have a question for TPS544C20 EVM.

I measured transient response of 0A to 10A transient on the EVM

Then I could see about 35mV drop like the below figure.

 

I added 10pcs of 100uF on VOUT (5 pcs for TP11-TP7, 5pcs for near C18/19/24/25) to reduce the voltage drop.

But the voltage drop waveform wasn't improved at all. I could see almost the same waveform.

 

Do you understand why the voltage drop was not improved at all with additional capacitance(100uF x 10pcs)?

 

Regards,

Oba


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