It is very simple that the capacitive reactance decreases with the rise of frequency, and the inductive reactance of inductance increases with the rise of frequency. In other words, the effect of 33uH inductance at 150Khz is basically the same as that of 100uH inductance at 52khz, and the principle of capacitance is the same. The LM2596 is an upgrade of the LM2576. However, the LM2576 also has the advantage of less switching loss and less interference.
The output current of the LM2575 is 1A. The output current of both LM2576 and LM2596 is 3A. The oscillation frequency of LM2576 is 50KHZ, and the oscillation frequency of LM2596 is 150KHZ. That is to say, with LM2596 to make a power supply, the inductance value is smaller. The volume of the inductor is smaller.