Other Parts Discussed in Thread: TPS65220, AM6421
I plan to use TPS65220 to power the AM6421, but I'd like to use a more efficient buck to produce 0.75V (VDD_CORE) directly from my main supply. Looking at Figure 7-5 in the datasheet it appears that the VDDS_DDR (1.1V) rail can come up before or after VDD_CORE. I'd like to use a 1.8V rail from the TPS65220 to enable my external 0.75V buck. Buck2 (1.8V) from TPS65220 comes up in the first row in the picture below. Please confirm whether VDD_CORE can safely come up prior to VDDS_DDR.