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xytech's avatar
xytech
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7 years ago
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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...
  • Rahul_S_Intel1's avatar
    Rahul_S_Intel1
    7 years ago
    Hi, Do you mean that the sum of all power rails' t_ramp should be within 50us-50ms? Yes
xytech's avatar
xytech
Icon for Contributor rankContributor
7 years ago

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.