Hi,
We have used TPS53647 in one of our board.
Input Voltage = 12V
Output = 0.9V
Output current = 30A
Ripple requirement = <5mV p-p
Now, we have made the second version of this board due to some modifications in version 1 board.
This time we have also done PI analysis and after PI results we have added extra capacitors. Extra capacitors are highlighted with Red color rectangular in the attached schematic.
Now in second version of board, we are observing around 80mv peak to peak ripples @ around 45kHz in oscilloscope which were not there in version 1 boards.
For measurements, we are using small BNC cable which is directly soldered at output capacitors to remove the possibility of probe related measurements errors.
Below is the imaAe of ripples observed on scope.
Schematic of Ver-2 board is 6685.0181.TPS53647.pdfalso attached for your reference.
