In this question, the last line of the accepted answer states that - That's why the text suggests using 1/5 or 1/10 of the switching frequency as an upper limit in terms of how fast you should design your control circuit to react in order to keep the output voltage constant.
In the above answer, can someone please tell me what components constitute the control circuitry in a typical buck converter circuit (consider a TPS54260 IC)? is the output inductor and capacitor constitute the control circuit or the internal Op-amps present inside the buck converter IC constitute the control circuitry?
What is the control circuitry that the answer is referring? Either the outside output inductor and capacitor or the internal Op-amp and other components present inside internal to the IC?