2 A buck regulator with a wide input window
The Texas Instruments TPS54231DRG4 is a step-down (buck) switching regulator from the Eco-Mode™ series, delivering 2 A from an input range spanning 3.5 V to 28 V. The output is adjustable from a 0.8 V reference up to 25 V, making it a fit for 3.3 V, 5 V, and 12 V rails from a 12 V or 24 V bus. Switching frequency is fixed at 570 kHz, a middle ground that keeps the inductor small without pushing switching losses too high for a 2 A part.
Junction temperature rating — where it lives
Because the part lacks a synchronous rectifier, an external Schottky diode is required for the low-side path — factor that into the BOM footprint and thermal budget.