Hi,
I am working on a 24v desing that requires ~750µF at the input for backup power reasons.
My plan was to place an LTC4364 before this bulk capacitance for protection and also for the ideal diode function.
The "Output Bypassing" section on the datasheet advices that in case of using ceramic bypassing a 100mR series resistor is recommended to improve stability in low load conditions.
I am building this big capacitance with several paralleled polymer capacitors. The combined ESR will be very low.
Adding 100mR series resistance creates other issues downstream in my system.
When I build my circuit in LTspice I can see that indeed, when the LTC4364 works in linear regulator mode, it does not like 750µF low ESR bulk capacitance. M1 gate gets very angry.
But if I increase the recommended 6.8nF loop compensation gate capacitor to 100nF, the stability looks fine. No angry M1 gate.
With this 100nF my circuit looks like Figure 1. on the datasheet, but with 750µF Cout.
Can this be considered a safe solution to tolerate low ESR output bypass capacitors?
