Hi!
my customer wants to know why there are caps (C19 &20 on the EVM) placed in the feedback path.
This would make the converter slower correct?
Why are the (DNP) implemented there and should the customer implenet them on their board or not?
Kind regards,
Marion
Marion,
If you are referring to these C19 and C20 capacitors, I would not say they are in the feedback path.
They are part of the L-C output filter. Yes, installing 2x220uF bulk capacitors would make the reaction time of the PMIC slower, but they are added for the opposite reason: they prevent the output voltage from dropping quickly or dropping too low when a heavy load is applied.
It is common to add very large bulk capacitors to an EVM or a prototype design and mark them as DNP. If you need to add capacitors due to high load steps, then you have the pads on the board already. You cannot determine if these are needed until your measure the performance of the PMIC with system load conditions.
