Now more and more projects pay attention to their digital ability and performance. To improve the yield rate on the extreme condition, the SHMOO and VMIN performance are considered, especially the Power which has big current. With the low Voltage and big Current, the Power will has large Droop and Kick during dynamic load, which may cause Pattern test fail. UVS64 has good Droop and Kick performance to match the requirements, but it can’t reach its best performance if BW is not set correctly. The BW value must be set according to the DIB bypass capacitance and ESR value, then the Power can be close to its best dynamic performance. The paper will introduce how to manage a good PI performance on DIB design, and calculate the BW value based on the DIB bypass capacitance and ESR value on programming, and after that how to tune the BW value by analyze current and voltage profile to get the best performance. With all the effort, SHMOO and VMIN can be improved.