This DC-DC converter module is a buck (step-down) converter combined with a boost (step-up) converter, of which output voltage can be lower or higher than the input. It features small size, high power, high efficiency and stable performance. It will maintain the stability of output voltage when input voltage is higher, lower than output voltage. Features: 1. This boost/buck module can step up or step down voltage and maintain a stable output voltage. 2. Input voltage DC 5V to 30V, adjustable output voltage DC ±5 -24V. 3. Adopting advanced microprocessor, it can accurately adjust output voltage and current. 4. High power, stable performance. 5. Widely used for ADC/DAC transport amplifier power supply, RS232 RS485 RS422 bus power supply, low-power audio power supply, car audio power supply, instrument power supply and LCD backlight power supply. Specification: Option: Without terminal, with terminal Input Voltage: DC 5-30V Output Voltage: DC ±5 -24V Max Output Power: 20W Max Conversion Efficiency: 68-89% Static Working Current: 2.5mA Size: 60*34*15mm / 2.36*1.34*0.59in Weight: Approx. 31-34g Package list: 1 * Boost-Buck Converter Module Note: 1. When the output voltage is less than the nominal voltage, this may be because that the load is too high or the the power of power supply is too low. 2. The negative voltage cannot be used alone. When using a negative voltage, the same load must be applied to the positive voltage terminal.