The LM3519MK-20 is an integrated buck converter from Texas Instruments. It is an adjustable frequency device that is capable of delivering up to 5A of continuous current with an input voltage of 18V to 36V. The device includes an integrated power MOSFET, current sense resistor, and error amplifier, which makes it ideal for applications requiring high efficiency with a small footprint. It features a wide variety of user selectable features, such as synchronous rectification, analog output voltage control, and programmable soft-start. In summary, the LM3519MK-20 is a high-performance integrated buck converter that is ideal for automotive, industrial and consumer applications.