DCR012405U1K   DCR012405P   DCR012403U pdf and datasheet:

http://www.chinaicmart.com/series-DCR/DCR012405U1K.html

DCR01 family  is a series of  high-efficiency, input- isolated, output-regulated DC/DC converters. In addition to 1W nominal, galvanically-isolated output power capability, this range of DC/DCs offer very low put noise, thermal protection and high accuracy. The DCR01 family is implemented in standard molded IC packaging, giving standard JEDEC outlines suitable for high-volume assembly. The DCR01 is manufactured using the same technology as standard IC packages, thereby achieving very
high reliability.