Hello,
My customer is planning to use the TI P/N: LMZ10501 switching power supply module in a new design and they have a few questions regarding its maximum output capacitance and transient response. They are planing to use 3 of them for 3 different power rails, primarily powering a Xilinx Artix 7 FPGA (XC7A35T-2CPG236C). However, the data sheet for the FPGA gives total input capacitance recommendations greater than the maximum output capacitance recommendations of the LMZ10501 and they are trying to determine whether:
a) the circuit can be designed such that there is more bulk capacitance on the output rail to meet the FPGA guidelines even if it is more than the LMZ10501 recommends while still avoiding the short circuit protection at startup,
b) the switching frequency and transient response of the LMZ10501 is sufficient to include less total bulk capacitance than the FPGA guidelines recommend to stay within the LMZ10501 maximum output capacitance,
or c) the requirements and recommendation of these two parts are incompatible and would not work well together.
The total power requirements of the FPGA are well within the output of the 1A nano module. The only question here is the power-up behavior. Do you have any additional information that can help them work through this?
Thanks,
Mehrdad.
