Ultra Miniature DC-DC Converters

Pico Electronics, the leader in high quality, reliability miniature power components, offers DC-DC Converters in a variety of package configurations.  Pico’s wide product range includes ultra-miniature regulated, isolated, programmable, and adjustable modules that offer  output voltages from 2VDC to 10,000VDC with power ratings from 0.75 to 300 Watts, in package heights from 0.200 up to 0.800 inches. These low profile modules have input voltage ranges from 3VDC up to 900VDC. Surface Mount and Thru-Hole. Custom models available.

https://picoelectronics.com/dcdclow/dcdc.htm