I want to understand the concept of current regulation in the circuit, In my research I came across the following link Boosting Regulator Current for IC 78xx by MJ2955
where in the circuit schematic in link above, the author claims he has obtained 12V,5A as output with 20V input voltage.
I see that when input current is 0.1A the output is 94mA approx. which agrees with ohms law V = I*R = 94.086mA * 53.33 ohm = 5.01V
This also agrees with ohms law V = I*R = 57.267 mA*53.33 ohm = 3.05V
So what is the impact of the PNP transistor in the circuit? How can I boost the current in my circuit? If I want to see 5W output across my load(53.33ohm in the schematic) what are the changes I should make in the circuit?
Note: I assume capacitors are only for smoothing the input and output and does not have much effect in simulation (correct me if wrong). I tried with 470uF in all three cases the results were same. (sorry was bit lazy to copy new screenshots and I didnt have enough reputation to embed schematics in my question)