LM2596S Adjustable Step-Down Regulator Module [DC-DC] [3A] is an adjustable DC-DC step-down switching adapter with 3A high current and excellent line and load regulation, which is based on LM2596S 3.0 A, Step-Down Switching Regulator chip. The LM2596 chip is a buck converter and easy solution to build step down voltage regulator. This chip has high efficiency (about 92%). This converter chip is a switching mode power supply with the 150KHz high switching frequency, results in reducing the size of filter components. Due to the high switching frequency, this module is optimized to work with a small inductor.