I want to power the VCCINT (0.85V) of a Xilinx FPGA. I intend to use the LTM4646 regulator in dual mode. However, I see the 1V Single Phase Single Output Load Transient Response in the datasheet and it's 33mV undershoot on Vout. Which in this case is a problem as Vout cannot go below the minimum 0.825V...
Can we expect the same undershoot level in dual mode?
I do not expect the FPGA, when powering up, to draw a such amount of current. Do you have any experience on this matter?