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Forum Post: UCD90160 - sequence off issue

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Hi All,

Need help.

I am tring to prepare configuration file for the UCD90160 which has 4 rails sequenced on (from smallest to biggest voltage) and off in opposit order (from biggest to smallest voltage).

I am trying to use "sequence off" dependencies but in offline mode graph doesn't behave as datasheet describes - see print screen.

Why on the below print screen Rail#2 (1V25) begins turn off at 2.1ms? What is so specific about this time instance?

NOTE: Rail#3 begins turn off exactly when Rail#4 PGOOD_OFF has been reached - which is correct and expected.

What am doing wrong?

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