Fixed 15V buck regulator for industrial rails
The LM2576HVSX-15 is a fixed 15V output, 3A step-down buck regulator from TI's SIMPLE SWITCHER series, switching at 52 kHz. It accepts an input from 4V to 60V, making it a straightforward choice for generating a regulated 15V rail from a wide-range DC bus in industrial control, motor drive, or telecom equipment.
Key ratings for BOM fit
Output is fixed at 15V — no external divider needed, but also no field adjustment. The 3A continuous output current covers moderate loads like relay banks, analog front-end supplies, or auxiliary fans. Input range from 4V to 60V handles unregulated supplies common in 24V and 48V industrial systems. Switching at 52 kHz keeps the inductor small enough for a TO-263 footprint, though the fixed frequency means the ripple spectrum is predictable for EMI filtering. No synchronous rectifier — the external Schottky diode carries the catch current, so diode selection directly affects efficiency at high duty cycles.