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UCD90120A: rail droop

Part Number: UCD90120A

We’re encountering an interesting interaction in our design with the power sequencer. One of our rails has an unexpected voltage droop after power is applied. This causes the sequencer to immediately react (as configured) and resequence the rails.

Is there a way in the configuration settings to ignore voltage droop during sequencing (other than say, the glitch filter)?

besides adding some bulk capacitance to the rail is there a recommended way around this? 

  • Hi

    Glitch filter is the way to workaround this if design can not be fixed to avoid the droop. The other way is to have a wide threshold.

    The cap on the MON is only for the decoupling for noise. if you have a some droop, you may need to look the design why there is a droop when power on, leakage, over current?

    Regards

    Yihe 

  • Hi

    We haven't heard from you for a while and assumed that the issue has been solved. Please reply if further help is needed.

    Regards

    Yihe