60V, 4A Monolithic Buck Regulator w/ Rail-to-Rail Programmable Output and Integrated Current Monitoring

The LTC3649 step-down regulator combines key features of a high voltage buck regulator with a complete feature set that allows for ease of use in a variety of applications.

from EETimes: http://www.eetimes.com/video.asp?section_id=124&doc_id=1330549&_mc=RSS_EET_EDT