Features: 1. This buck converter is designed to convert input voltage into lower output voltage, and its input voltage range is 4.75-40V. 2. Multiple protection functions including over-temperature shutdown, input under-voltage protection, BS-voltage protection, and short circuit protection. 3. Made with high quality electronic components, stable performance. 4. Reasonable component layout, easy to wire and use. 5. 2.54mm pin pitch, for MCU Development Board Breadboard friendly. Specification: Output voltage: 3V 3.3V 3.7V 5V 6V 7.5V 9V 12V (Optional) Working frequency 550kHz Conversion efficiency: 75-90% Pin pitch: 2.54mm Size: 18.3*10.2*6.7mm / 0.72*0.4*0.26in Weight: 5g (approx.) 3V : Input voltage: 4.75~40V Output voltage: 3V Maximum output current: 1A Quiescent current: about 1.5mA 3.3V : Input voltage: 4.75~40V Output voltage: 3.3V Maximum output current: 1A Quiescent current: about 1.5mA 3.7V : Input voltage: 5~40V Output voltage: 3.7V Maximum output current: 1A Quiescent current: about 1.5mA 5V : Input voltage: 6.6~40V Output voltage: 5V Maximum output current: 1A Quiescent current: about 1.5mA 6V : Input voltage: 7.5~40V Output voltage: 6V Maximum output current: 1A Quiescent current: about 1.5mA 7.5V : Input voltage: 9~40V Output voltage: 7.5V Maximum output current: 1A Quiescent current: about 1.5mA 9V : Input voltage: 11~40V Output voltage: 9V Maximum output current: 0.9A Quiescent current: about 1.5mA 12V : Input voltage: 14~40V Output voltage: 12V Maximum output current: 0.8A Quiescent current: about 1.5mA Package List: 1 * Voltage Converter Note: This is a DC-DC voltage converter module, Must be noted when using: 1. Input voltage can not be greater than the maximum input range 2. Output power can not be greater than the maximum load for a long time 3. Input power must be greater than the output power, because the power consumption of the module itself