T_ramp time question on Cyclone10 LP device

[xytech]

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!

 

[xytech]

UP​

[xytech]

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.

[xytech]

up​

[Rahul_S_Intel1]

Hi, Total supply attached to the POR monitoring supply

[xytech]

Hi RSree,

Do you mean that the sum of all power rails' t_ramp should be within 50us-50ms? Thanks.

[Rahul_S_Intel1 · Accepted solution]

Hi, Do you mean that the sum of all power rails' t_ramp should be within 50us-50ms? Yes