LM2596S-ADJ

The LM2596-ADJ are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator,  capable of driving a 3-A load with excellent line and load regulation. These devices are available in fixed output voltages of adjustable output version.  
Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, and a   fixed frequency oscillator.
The LM2596 series operates at a switching frequency of 150 kHz, thus allowing smaller sized filter components than what would be required with  lower frequency switching regulators. Available in a standard 5-pin TO-220 package with several different lead bend options, and a 5-pin TO-263 surface mount package.