LM2576 circuit

Hi makers!

The integrated fixed / adjustable regulators (ADJ) operating in switching mode are of the "step-down" (LM2575 / LM2576) and "step-up" (LM2577) type, respectively.

This series of regulators is also notable for its very good efficiency, over 80%, and for a decrease in dissipated power, which is good enough arguments to use them instead of the classic 3-terminal stabilizers. Usually, these stabilizers do not require a cooling radiator, and if we still want to mount one, it will be much smaller than in the case of old stabilizers.

These integrated circuits are delivered in a 5-pin TO220 type capsule (LM257x-T) - adjustable voltage variant (ADJ) or in a 4-pin TO-3 type capsule (LM257x-K) - with a fixed output voltage.

Circuit diagram and bill of materials are available below.

This project is presented "as is" and is intended for personal use.

Most of the time I use salvaged components or buy from local store, but I tried to build a BoM for you too using LCSC.com supplier.

Enjoy it! 🤓

LM2576.xlsx

#PCB# #LM2576#