T_ramp time question on Cyclone10 LP device - T_ramp time question on Cyclone10 LP device Hi , We use 10CL055YU484C8G. MSEL sets as Standard POR mode, datahseet reqiures ramping time of power supply to be within 50us~50ms. Is this requirement apply for each single power rail's t_ramp or Total t_ramp time of all rail? Thanks! Replies: Re: T_ramp time question on Cyclone10 LP device Hi, Do you mean that the sum of all power rails' t_ramp should be within 50us-50ms? Yes Replies: Re: T_ramp time question on Cyclone10 LP device Hi RSree, Do you mean that the sum of all power rails' t_ramp should be within 50us-50ms? Thanks. Replies: Re: T_ramp time question on Cyclone10 LP device Hi, Total supply attached to the POR monitoring supply Replies: Re: T_ramp time question on Cyclone10 LP device up Replies: Re: T_ramp time question on Cyclone10 LP device another question is , if the power rail ramps up too fast (<50us) or too slow(>50ms), what may happen? Thanks. We now have a LDO desgined for VCCA_PLL_2V5 for 10CL055YU484C8G , whose ramp time is rather short, about 30us or so. That's is my worry. Replies: Re: T_ramp time question on Cyclone10 LP device UP