Triple-output switching DCDC converter based on LT3514 from Linear Tech

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LT3514power is a triple-output switching DCDC converter, based on the LT3514 IC from Linear Technology.

Input voltage can reach up to 36V, the lower bound is determined by the desired output voltages. Such voltages can be set through feedback resistive networks.

PCB files (designed with Kicad) and Gerber files are available on Github, along with an Octave file (calc.m) to determine component values.

Black PCBs from Elecrow.


Octave script for component calculation

x-objcsrc - 415.00 bytes - 07/28/2016 at 17:21


Kicad files

Zip Archive - 45.92 kB - 07/28/2016 at 17:20


Gerber files

Zip Archive - 48.50 kB - 07/28/2016 at 17:19


Adobe Portable Document Format - 40.88 kB - 07/28/2016 at 17:16


  • 1 × LT3514 Triple Step-Down Switching Regulator with 100% Duty Cycle Operation
  • 1 × Tactile switch SMD
  • 11 × SMD Resistor (values depending on output voltages) SMD 0805
  • 1 × 2-poles screw terminal
  • 1 × 5-poles screw terminal

View all 12 components

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Avi Cohen wrote 09/28/2019 at 16:20 point


Is the BOM open for download ?

  Are you sure? yes | no

WallaceIT wrote 08/08/2016 at 12:02 point

Thank you!

I had most of the components in my personal reserve, but I'd say about 20 euros in single quantity (being 4.50 euros the LT3514 alone)

  Are you sure? yes | no

Mic wrote 08/07/2016 at 22:26 point

Nice project! Do you have an estimate of the cost for the PCB + component ?

  Are you sure? yes | no

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