The A7596 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable o driving a 3A load with excellent line and load regulation. These devices are available in fixed output. Voltage of 5V and adjustable output version. The A7596 operates at a switching frequency of150KHz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. https://www.campuscomponent.com/products/ait-semiconductor-a7596s5r-adj-ic-3524-d/2208614000051433520