Features: 1. This buck converter is designed to convert input voltage into lower output voltage, and its input voltage range is 4.5-27V. 2. Multiple protection functions including over-temperature shutdown, under-voltage lockout (UVLO), 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. Application: Motor toy, LED, CCTV camera, instrument, battery charger, audio amplifier and more. Specification: Output voltage: 3V 3.3V 3.7V 5V 6V 7.5V 9V 12V (Optional) Working frequency 900kHz Conversion efficiency: 76-92% Working temperature: -20~50 Size: 25*15*6.3mm / 0.98*0.59*0.25in Weight: 3g (approx.) 3V : Input voltage: 4.5~27V Output voltage: 3V Maximum output current: 2.5A Short time maximum output current: 3.5A Quiescent current: about 250A 3.3V : Input voltage: 4.5~27V Output voltage: 3.3V Maximum output current: 2.5A Short time maximum output current: 3.5A Quiescent current: about 250A 3.7V : Input voltage: 4.5~27V Output voltage: 3.7V Maximum output current: 2.5A Short time maximum output current: 3.5A Quiescent current: about 250A 5V : Input voltage: 6.6~27V Output voltage: 5V Maximum output current: 2.5A Short time maximum output current: 3.5A Quiescent current: about 250A 6V : Input voltage: 7.5~27V Output voltage: 6V Maximum output current: 2.5A Short time maximum output current: 3.3A Quiescent current: about 250A 7.5V : Input voltage: 9~27V Output voltage: 7.5V Maximum output current: 2.5A Short time maximum output current: 3A Quiescent current: about 250A 9V : Input voltage: 11~27V Output voltage: 9V Maximum output current: 2.3A Short time maximum output current: 3A Quiescent current: about 250A 12V : Input voltage: 13~27V Output voltage: 12V Maximum output current: 2A Short time maximum output current: 3A Quiescent current: about 250A 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