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PF3000 LDOG

Question asked by Tim Vielhaber on Mar 18, 2019
Latest reply on Jul 14, 2019 by Donna290 wwert

I have a 5V implementation with the PF3000 PMIC.  I previously used the chip on a different design but with 4V input.  Now with 5V input, I am using an external FET and LDO controller to generate the VIN from my 5V.  I am getting only 2.8v on VIN.  It appears if the LDOG gate signal is also at 5V, so FET is not ON?  Is there any setup of the PF3000 that needs to be done to enable the LDO circuit to generate the proper gate signal to the external FET?  Any other ideas why I have no FET gate drive?

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