Description: The LM2596S is a monolithic integrated circuit that provides all the active functions for a step-down (buck) switching regulator, capable of driving a 3A load with excellent line and load regulation. Features: Wide input voltage range: 4.5V to 40V Output voltage range: 1.23V to 37V Output current up to 3A Internal frequency compensation Internal over-temperature protection Internal short-circuit current limit Low quiescent current Low ripple and noise High efficiency Applications: DC-DC converters Battery chargers Power supplies Automotive systems Portable equipment(For reference only)
https://www.utsource.net/itm/p/1016532.html