As title, I have 3 question.
First , please look at picture.
If the TPS5410 output is 5 Voltage,I need to control the ripple value at 3-5%;May be is 150mV-250mV(ideal)
But i find the TPS5410 oringinal EVM Board,which output is for 5 Voltage ,And the ripple is 500~720mV.
then I have 3 Quesiton.
1.First , i don't know how to choose the red part value , and i don't know the red part value could cause the ripple or noise effect the circuit
2.
I modification the position of the input cap,output cap,inductor,and some component is reference the EVM board like this
but i test the board of two circuit , and result is didference ,why??
3.
I modification the layout reference this picture input cap and inductor is close to TPS5410,
I seem the noise maybe has reduce,but it is not perfect than EVM Board
My Board is 800mV~1.9V , but the EVM board is only 500~700mV why?
This is two circuit board of result
this is EVM board
My board schematic