The OKLP-X/35-W12-C power block dc/dc converter module for FPGA and embedded applications is a non-isolated buck converter without the PWM controller. It measures 25.4 mm x 12.7 mm x 11.1 mm and has a typical efficiency rating of 94%. Input voltage is a nominal 12 Vdc and can accommodate the range of 7 to 13.2 Vdc. A datasheet is available at http://www.murata-ps.com/data/power/oklp-x35-w12.pdf
Murata Electronics North America Inc.