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About PGOOD of ADP2164

Question asked by xiaoyur on Mar 31, 2017
Latest reply on Apr 3, 2017 by Migs

Hello!

 

   I just want to make the PGOOD pin be high.

   http://www.analog.com/media/en/technical-documentation/data-sheets/ADP2164.PDF

 

   The EN pin is a slope signal (high is 4.1646V and low is 4.076V) with a period of 1.8ms.

   SW is rectangular wave with a period of 1.6us. FB is 602 mV, PGOOD is 135mV.

 

   According to the datasheet of ADP2164, there are two questions I can not understand.

      i. FB is fit the range of 600mV+-10%, but the PGOOD is low (I guess the 135mV indicates the low). Why?

      ii. What is the minimum voltage of high state of PGOOD pin?

 

Thanks for any reply!

 

-Xioayur

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