Description The 300W 9A Step Down Buck Module 5-40V To 1.2-35V is ideal for applications where you need to power up a low voltage device from a high voltage source. Specification: • Output Regulation Modes: Constant Current, Constant Voltage • Switching Control IC: XLSemi XL4016 • Input Voltage: 5V – 40VDC • Output Voltage: 1.2V – 35VDC • Dropout Voltage: 1VDC • Output Current (Max): 8A (Cooling fan should be used if the inductor’s temperature exceeds 65℃) • Constant Current Range: 0.2A – 9A (if the temperature exceeds 65°C please add a cooling fan) • Constant Current Drift (Max): < 5% @ 5A (Measured from 25℃ to 60℃) • No-load Current (Typical): 20mA • Output Power (Max): 300W • Conversion Efficiency: Up to 95% • Switching Frequency: 180kHz • Output Ripple (20MHz Bandwidth, Input @ 24V, Output @ 12V 5A): ~50mV • Load Regulation: ±1% • Voltage Regulation: ±1% • Operating Temperature Range: -40℃ to 85℃ • Output short circuit protection using the built-in current limiting • No input reverse polarity protection • No inline diode on the output to prevent voltage feeding back into the module • Size: 65mm x 48mm x 24mm Instructions: • Turn the potentiometer clockwise to increase voltage/current and counter-clockwise to decrease voltage/current • The voltage adjust potentiometer is on the same side as the input voltage terminals • The current adjust potentiometer is on the same side as the output voltage terminals Packing List:  1 x XL4016 300W Adjustable Supply Module With Charging Indication