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TPS785-Q1: How to choose the output feedback resistor of TPS785-Q1

Part Number: TPS785-Q1

Hi team.

As shown in the figure below, the description in the red box makes the current flowing through R1 and R2 at least 100 times greater than the IFB current listed in the electrical characteristics table.  What is the theoretical basis for this greater than 100 times?  There is also how to consider the influence of FB pin current error term, and obtain the best accuracy?  (According to the manual LDO output accuracy typical value: 0.5%, maximum value: 1.7%).

Is there a specific data book that describes the LDO output feedback resistance calculation method?  Please send me the link.  thank you.