I recently came across this figure detailing the compensation of the UC3833 in the App Note “A High Performance Linear Regulator For Low Dropout Applications” and they show the use of both a current loop and a voltage loop for compensation.

I am familiar with the use of only one loop, namely a voltage loop for compensation like shown in this figure (taken from chapter 5 of “DC Power Supplies” of N. Kularatna)

So now my question is why is the additional current loop necessary or advantageous? Any link to background information is greatly appreciated

I recently came across this figure detailing the compensation of the UC3833 in the App Note “A High Performance Linear Regulator For Low Dropout Applications” Available here and they show the use of both a current loop and a voltage loop for compensation.

I am familiar with the use of only one loop, namely a voltage loop for compensation like shown in this figure (taken from chapter 5 of “DC Power Supplies” of N. Kularatna)

So now my question is why is the additional current loop necessary or advantageous? Any link to background information is greatly appreciated