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About ADM1186-2

Question asked by Trincazz on Jan 16, 2018
Latest reply on Feb 15, 2018 by hopal

I'm using ADM1186-2 for 4 power supply sequencing in my design. ADM1186-2 is powered by 3.3V and 4 supplies to be sequenced are 2.25V, 2.5V, 1.2V, 1.1V in order. 

I'm using an external mechanical switch to give UP pin a high for power sequencing to start...

 I'm seeing an issue where I see the OUT1 doesn't come up, it's around 0.5V always. The power is on and a high is given to UP pin, but still OUT1 remains low. Since OUT1 doesn't get enabled, the other supplies doesn't get enabled.

 

Can you suggest what am I doing wrong here? Any help will be appreciated. 

 

I have attached a screenshot of my schematic. 

Outcomes