Step Down Regulator Circuit Schematic Diagram using LM2576

LM 2576 is a simple high efficiency step-down (buck) regulator. The function of this circuit is similar with Simple regulator circuit using LM7805, but with more regulator features and output current up to 3A. The features of LM2576 are wide input voltage range, output voltage 5VDC high output current (up to 3A), only requires 4 external components, high efficiency, etc

you can found more specification for LM2576 at

Regulator lm2576

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