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Tool/software: WEBENCH® Design Tools
I am considering using x2 P/N: TPSM84624 for FPGA core rail supplies. Output Voltages of 0.85V, Input of 12V. I tried simulating the design in WEB BENCH, and could change ceramic caps to CUSTOM value w/ 6-moHm of ESR. It simulated about 17mV or 2% of ripple.
Rail1-Capacitors: (x1)680uF-poly, (x1)100uF, (x2)4.7uF
Rail2-Capacitors: (x1)680uF-poly, (x4)100uF, (x3)47uF,(x6)4.7uF
Please let me know if this is a good idea, these parts are some of the smallest parts with integrated inductor for 6A I have seen. I am open to other suggestions as well
Sincerely,
Bill M.
These devices are designed to power FPGAs and meet their high performance design specs. The amount and type of capacitance is important to meet the performance specs.
Please contact me directly at jarrigo@ti.com to discuss your requirements and the key care-abouts of your design.
Thanks, Jason