I have a working schematic (see below) that I use for another PCB, which I got from somewhere else. I'm now re-using this schematic for a different PCB that I know doesn't have the same high power requirements/load. The PCB I want to use it for will step the power supply voltage down from 12/24V to 5V 600mA.
I know I can lower the inductor value and probably the electrolytic capacitor? Anything else?? My goal is cost optimization. Currently 22uH is overkill as someone told me for 5V 600mA output. The whole board doesn't use more than 300mA at full operation.
I've read the data sheets and they offer a bunch of complex formulas that are above my knowledge/skillset. I'm wondering if anyone can recommend a lower value inductor that will work safely and any other parts that can be "downgraded" but still accommodate the new requirements?