DC to DC CC CV step-down board is a 300 kHz fixed-frequency PWM buck (step-down) DC/DC module, capable of driving a 5 A load with high efficiency, low ripple, and excellent line and load regulation. XL4015 E1 power converter is a high-power, high-efficiency, 5 A high-current output module with low ripple and a power indicator. Input voltage range: DC 8 V – 36 V; output voltage range: DC 1.25 V – 32 V; includes over-temperature protection, short-circuit protection, and current-limit protection. Even under output short-circuit conditions, the module remains protected. This DC-DC converter is suitable for testing multiple system operating voltage ranges, maintaining stable output voltage, and limiting output current across varying input voltages. Ideal for general voltage conversion, battery charging, powering raw LEDs, automotive electronics, battery systems, microcontrollers, and electronic projects. Non-isolated constant-current and constant-voltage module with non-synchronous rectification. Input voltage: 8–36 V (do not exceed 36 V) Output voltage: 1.25–32 V (continuously adjustable) Output current: 0–5 A (adjustable); recommended maximum continuous use at 4.5 A Operating temperature: –40 °C to +85 °C Switching frequency: 300 kHz Maximum output power: 75 W Conversion efficiency: up to 95% (efficiency varies depending on input voltage, output voltage, current, and voltage differential) Output ripple: ≤50 mV (20 MHz bandwidth) Load regulation: ±0.5% Voltage regulation: ±2.5% Short-circuit protection: Yes Over-temperature protection: Yes (output automatically shuts down when overheated) Reverse-polarity input protection: Not included (if required, add a high-current diode in series at the input) Connection method: Terminal block or solder pads; labeled IN (input) and OUT (output) Dimensions: 5.1 × 2.6 × 1.5 cm Housing material: ABS Color: As shown Package includes: 10 × Step-down DC-DC Converter Boards