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CDCE62002: Inrush Current

Masaaki MURAI
Prodigy 170 points

Part Number: CDCE62002

Hi,

I can see Inrush Current on 3.3V rail of CDCE62002.

I think the capacitance on REG_CAP pin causes the inrush current. Because removing the capacitance , Inrush Current is reduced.

It is around 0.8A. Is it acceptable?  Please let me know the absolute maximum rating.

/cfs-file/__key/communityserver-discussions-components-files/48/Inrush-current-of-CDCE62002.pdf

Best Regards.

  • 0
    TI__Mastermind 28590 points
    Hello Masaaki-san,

    I would agree, the in-rush current is associated with the 10 uF caps on the REG_ pins. Being the EVM, I consider this acceptable as a design.

    As for the maximum, I could not say as this will be a function of the capacitors used.

    If you want to try to limit the current, you could consider using a series resistor provided that the IR drop will be acceptable in your final operating current level.

    73,
    Timothy
  • 0 in reply to Timothy T
    Prodigy 170 points
    Hi,
    In our custom board, the caps on REG_CAP pins are same as EVM that is 10uF.
    I understand that this inrush current is acceptable to CDCE62002.
    Thank you.

    Best Regards.