5pcs LM317 DC-DC Converter Buck Circuit Board Adjustable Linear Regulator<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Output Current: 1.5A (min)， 2.2A (type) Input-output voltage differential (VI-VO): 40Vdc (max)</li><li>Adjustable output voltage range: 1.2 ~ 37V</li><li>Operating temperature: -55? to +150?</li><li>Current output: 1.5A Voltage Input: 4.2 ~ 40 V</li><li>Characteristic frequency: 100 (MHz) Module size: 35.6 (mm) x16.8 (mm)</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51Ee7ZZs0tL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51usH0A90WL.jpg" noproxy>