ETA-USA's 150W DC/DC - ODC150-SC-W single output isolated converters offer a wide 8 -to-1 input   (9VDC~75VDC) and can operate at a wide temperature range. 

The ODC150 series are ideally suited for applications that demand a high degree of performance including:
· Industrial control
· Battery management system
· Automation power application
· Data-communication

No Minimum Load ( soft start),  Operating Temp. -40 ~105 C.

  http://eta-usa.com/pdffiles/dcdc/ODC150-XXSC48-W.pdf