1-150W dc-dc converters come in varied package configurations

IDEAL POWER URB series dc-dc converters are available in a number of package configurations, input and output voltage options and with comprehensive protection features. Models available include single and dual output, isolated and non-isolated from 1 to 150 watts, available in different footprints including SIP, DIP, SMT, 1×1 and 2×2 and with DIN-Rail and Chassis Mount options. Typical operating temperatures are over the range  -40°C to +85°C. Starting at 1 to 3W the range of SMD devices deliver compact size, high power density and continuous short-circuit protection.  http://www.idealpower.co.uk