Perhaps it was asked a million of times, but I could not find the answer.
Say for example I have a basic voltage divider used as a reference for TL431 or a simple resistor in pairs with a zener diode. I can stepdown the voltage, but I can't exceed the current above some point, because of the upper-leg resistor. Am I right? I just can't workout an idea into my brains about whether or not I can amplify this current and still remain the same voltage even after doing some research. Could I do it using FETs? I want to supply 555 with 5V from mains input, but this part of the circuit will also be used to drive a pair of transistors, so I want to have an advantage of higher current.