This circuit is based on LM2587, a simple boost converter from Texas instruments. It produces a 12V regulated output for a input of 5V. It can also be used as a multiple output regulator, forward converter and as a flyback regulator. This regulator requires minimum number of external components, which makes it cost effective.
- Input(V): 4.5VDC to 5.5VDC
- Output(V): 12V DC
- Output load: 1.2A
- PCB:38mm X 30mm
5V to 12V @1.2A regulated power supply using LM2587 – [Link]