TO-220 Buck Converter: drop-in replacement for linear regulator

Ketan Desai designed this tiny PCB to be a DC-DC converter that works as a drop in replacement for old TO-220 linear regulators:

TO-220 Buck Converter

Swap out your LDO for a switcher today, with these designs for a modern take on the TO-220 mounted LM1117 and 78xx series LDO regulators!
This project is my take on a quick and easy replacement for the 3-pin LDO. The aim is to replace TO-220 linear regulators with a switching converter, in pursuit of higher efficiencies and current capacity.

Using a Recom RPX series DC-DC module for its small size and incorporating SMD feedback resistors and bulk capacitance on board allows for a drop-in replacement to existing LDO designs, while remaining in the same overall footprint as the counterpart.

As LM1117 LDOs have a different pinout to the 78xx series of regulators, I designed two versions of the layout.

TO-220 Buck Converter: drop-in replacement for linear regulator

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