The LM2576HVS-5.0/NOPB is a fixed 5 V output step-down (buck) regulator from the SIMPLE SWITCHER® family, delivering 3 A continuous from a 4 V to 60 V input rail. The 52 kHz switching frequency is low by modern standards — it keeps the switching losses down but pushes the inductor value up, typically 100 µH for a 3 A design.
Input headroom and temperature grade
The 60 V maximum input gives real headroom for unregulated supplies in 24 V and 48 V industrial systems — a 48 V nominal rail with 20 % tolerance sits at 57.6 V, still inside the absolute-maximum rating. No synchronous rectifier on this part, so the external Schottky diode (e.g. 1N5822) handles the catch current — its forward drop adds to the overall efficiency, roughly 75-80 % at full load.