LM2596 DC/DC step-down power transformer module is based on LM2596/XL2596 3A model as the main control chip/switching regulator. The module comes with a digital tube to display the voltage and a Schottky diode to protect the reverse connection. This versatile, compact module is useful in many applications where it is necessary to generate a lower regulated DC voltage output from a higher voltage supply. Its efficiency and heat dissipation are much higher than traditional linear regulators. Features: Comes with digital display voltmeter. Voltmeter range: 0 to 40 V, error + -0.05. Input voltage range: 4-40VDC. Output voltage range: 1.25-37DC adjustable. Output current: steady state 2A (3A max.). Conversion efficiency: up to 88% (efficiency is proportional to output voltage). Switching frequency: 150KHz. Protection against reverse polarity. Built-in short circuit protection function. Integrated thermal closure function. Features: Quantity: 1pc Input voltage range: 4-40VDC Output voltage range: 1.25-37DC adjustable Output current: 2A Voltmeter range: 0 to 40V, error + -0.05V Switching frequency: 150KHz Package size: 75 * 35 * 35mm / 2.95 * 1.38 * 1.38in Package Weight: 28g / 0.99ounces Note: 1.Due to different display screens and light effects, the actual color of the item may differ slightly from that shown in the photos. 2.Please allow a little measuring deviation. to manual measurement Package list: 1 * module