USB Netzteil

USB power supply

The USB socket provides by default 5V driving 500mA, in good cases and external supply even 2A. So it would be handy to have multiple supply voltages hence I've built a little power supply offering up to 40V (well, in realitity 12V output should be enough).

Therefor I've followed the application note from Linear for LTC3114 and built a nice pcb. As this is a Buck/Boost Converter, larger and lower voltages than the 5V input can be easily created.

Schematic

Note: the schematic only shows the popultated pcb, USB, voltmeter or output connector are not reflected

PCB

Assembly

Combined with a voltage display I've ended up with this one:

Key Components

• LTC3114
• Voltmeter SKU096509