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ADP5092 configuration

Question asked by florent Employee on Apr 23, 2018
Latest reply on Apr 25, 2018 by florent

Hi EZ, 

 

I am currently trying to re-configure the ADP5092. This is the behavior that I am looking for :

-Vsys = 2.4V constant to power up my microprocessor

-Reg_out = 3.6V constant to power up another ADP

 

According to the datasheet, if I want to fix Reg_out = 3.6V I have to set Rvid to 27.7kOhm (currently 55.6kOhm on my schematic as I was delivering 3.3V before).

 

For fixing Vsys, according to the datasheet there is this formula : 

 

  • Vref is supposed to be fixed around 1V according to the datasheet, but when I look at the voltage on the oscilloscope I can only see this signal, do you have an explanation for this ?  

 

 

  • The thing that I don't get is that Vbat = Vsys, do you have an idea how to change this ? 

 

Here is the current schematic that I am using : 

 

 

Thanks for your help,

Florent

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