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PF0100 PMIC GEN_3V3 voltage drop

Question asked by Frank Liu on Jul 23, 2018
Latest reply on Jul 27, 2018 by Jose Alberto Reyes Morales

When I add extra load from DC load “Chroma 63640-80-80

Output voltage of GEN_3V3 start drop when load over 1.5A

Spec mention Isw2 support 2A , could you double check what reason voltage drop

 

Vin of GEN_3V3 is 3.4V , it is too close output voltage 3.3V

Vout will drop due to internal Rdson and Inductor Rdson

 

voltage drop in the conduction path as given by the following equation: (VINSW2 - VSW2) = ISW2* (DCR of Inductor +RONSW2P + PCB trace resistance).

 

am I right? 

 

Thanks!

 

 

 

Vin “SYS_VIN” = 3.4V

 

 

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