LM2576-ADJ is a Adjustable step down (Buck) switching voltage regulator IC in TO220 package, capable of driving 3A load with excellent line and load regulation. This is an 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 LM2576 series offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in some cases no heat sink is required.