Buck (Step-Down) Converter, MC34063, MiniPCB, 09H-13, Rev A1-01

I made a Buck Converter based on the MC34063!

The circuit is highly similar to the Step-Down Converter (Figure 11) shown in the onsemi datasheet. https://www.onsemi.com/download/data-sheet/pdf/mc34063a-d.pdf

The PCB is a two layer board, and designed to be easy to manufacture and assemble. And it is optimized for cost by being panelized on 100 x 100 mm squares.

Signals are routed on the bottom layer (the layer with the part number), and a common ground plane (as uncut as possible) is on the top layer.

The P1 connector is located in a standard position with respect to the board edges: making it possible to build a universal tester, backplane, or stand.

For ease, start with the shortest components.

If a potentiometer is installed with pin 1 in the wrong place, the adjustment procedure will be inverted (CW/CCW).

For ease of changing between five-pin boards, use Interface Board, 00A-12.