DLPS117B July 2018 – October 2020 DLPC6421
TI recommends that the DLPC6421 device power delivery system provide two independent 1.8-V power sources. One of the 1.8-V power sources should be used to supply 1.8-V power to the DLPC6421 device LVDS I/O and internal DRAM. Power for these functions should always be fed from a common source which is recommended to be linear regulator. The second 1.8-V power source should be used (along with appropriate filtering as discussed in the PCB layout guidelines for internal DLPC6421 PLL power section of this document) to supply all of the DLPC6421 device internal PLLs. In order to keep this power as clean as possible, TI highly recommends a dedicated linear regulator for the 1.8-V power to the PLLs.