Description
This DC-DC Step-Down (Buck) Converter Module is a high-efficiency voltage regulator that allows you to convert a higher DC voltage to a lower, precisely adjustable output. With support for input voltages from 3V to 40V and an adjustable output range of 1.5V to 35V, it’s perfect for powering microcontrollers, sensors, LEDs, and embedded electronics from a wide range of power sources.
The module features premium SANYO solid capacitors, a 36μm thickened PCB, and a high-Q inductance coil, making it reliable under continuous load up to 3A. A built-in high-power LED indicator helps monitor power status during operation.
✅ Key Features
Input Voltage: 3V to 40V DC
⚡ Output Voltage: 1.5V to 35V DC (continuously adjustable)
Output Current: Up to 3A max
Built-in High-Power LED Indicator
All SANYO Solid Capacitors – Reliable and long-lasting
High-Q Inductor – Stable output with reduced heat
36µm Thickened PCB – Supports high current flow
Compact Size: 45 × 20 × 14 mm (with potentiometer)
Note: Input voltage must be at least 1.5V higher than the output voltage
Technical Specifications
| Parameter | Value |
|---|---|
| Input Voltage | DC 3V – 40V |
| Output Voltage | DC 1.5V – 35V (adjustable) |
| Max Output Current | 3A (recommended ≤2A for stability) |
| Efficiency | Up to 92% (depending on load) |
| Indicator | High-power LED |
| PCB Thickness | 36μm |
| Capacitor Type | SANYO solid capacitors |
| Inductor Type | High-Q coil |
| Dimensions | 45 mm × 20 mm × 14 mm |
| Adjustment Type | Potentiometer (manual tuning) |
Applications
Power supply for Arduino, ESP32, Raspberry Pi
LED strip voltage control
Battery-powered robotics
DIY electronics and STEM projects
Voltage regulation in industrial sensors
DC fan or small motor control
FAQ – Frequently Asked Questions
Q1: Can this module boost voltage?
❌ No. This is a step-down (buck) converter. Input must be 1.5V higher than the output.
Q2: Can I use it with a 12V battery to power a 5V Arduino?
✅ Yes! Set the output to 5V using the potentiometer and you’re good to go.
Q3: What is the maximum safe current?
⚡ The module supports up to 3A, but for long-term use, it’s best to keep it below 2A with proper heat dissipation.
Q4: How do I adjust the output voltage?
Use the onboard potentiometer while monitoring the output with a multimeter.
Q5: Is it safe for continuous operation?
✅ Yes, especially thanks to SANYO solid capacitors and thick PCB, but make sure airflow or a heatsink is used if pushing high current.
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