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LTC4418 undervoltage

Question asked by desimmon on May 23, 2018
Latest reply on Jun 4, 2018 by desimmon

Hello, I am using a USB input into the LTC4418, and set the undervoltage/overvoltage resistors such that the V1 is only valid between 4.5 and 5.5V.  The problem is, when I turn on my downstream load V1 sags enough to fall below 4.5V, disabling the output.  Any ideas?  I am already using a soft-start regulator downstream.