FPGA power supply design is very important. Common FPGA power supply IOs include core power supply VCCINT, auxiliary power supply VCCAUX, io power supply VCCO, and BRAM power supply VCCBRAM.
Taking the xilinx FPGA as an example, for information about the power supply, please refer to Spartan-6 FPGA Data Sheet: DC and Switching Characteristics similar documents.
You can get the requirements for different power supply voltages, power-on sequence requirements, and soft-start time settings from the article. It should be noted that the current required by the core power supply is generally above 2A.
The schematic diagram of the ARTIX-7 power supply part is as follows:
The power chip chosen is: LTM4644, which can provide 4 channels of 0-5V, 0-4A power supply. Please see the chip manual for how to use this chip. Here, the TRACK pin configures the soft-start time, and the RUN pin controls the power-on sequence.
Filter capacitor selection in the power supply section
For the capacitor part, I mainly drew it with reference to the development version.
