The LM2576 Is a Very useful regulator and low-cost integrated circuits that provide all the active functions for a step-down (buck) switching regulator. In This article I will explain about very easy buck converter circuit diagram ( dc to dc step down converter) The ICs are capable of driving a 3A load with excellent line and load regulation. The devices are available in both adjustable output and in fixed output voltage versions (3.3V, 5V, 12V and 15V).

The LM2576 requires only a minimum number of external components, in this buck converter we will use only 7 components. A standard series of inductors optimized for use with the IC are available from several different manufacturers. Because of the high efficiency of the switching regulator, the required size of the heat sink will be small and in some cases no heat sink is required.

The regulator will work with a wide input voltage range: up to 40V for the low voltage and up to 60V for the high voltage (HV) version. Other features: external TTL shutdown capability with 50 µA standby current, cycle-by-cycle current limiting and thermal shutdown for full protection under fault conditions.