Hi,
I our application the power sequence is designed as per the Reference Design (SLVA411).
In which VDDS(1.8) is ramped up first and VDDSHV(3.3) next and then VDDS_SRAM_xxx(1.8)
as shown below.
Whereas, the AM3505 datasheet mentions
"VDDS and LDO supplies (VDDS_SRAM_CORE_BG, VDDS_SRAM_MPU)
and oscillator supply (VDDSOSC) should come up first to a stable state. "
We can understand the datasheet is the correct one but our design is bit old which
was based on the older version of datasheet(2009) and the Reference Design.
Could you please let us know if this design is wrong and should we re-design the
sequence according to the latest datasheet(which is difficult now)?
Actually all the design guides TPS65073/TPS65023 are as per the older datasheet.
Will it be OK to continue with the older design?
Best Regards
Kummi