DC-DC Buck Converter 5A 5-32V Adjustable Step-Down Module
DC-DC Buck Converter 5A 5-32V Adjustable Step-Down Module
DC-DC Step-Down Buck Converter Power Supply Module — Dual Channel, 5A, 90% Efficiency
This compact DC-DC step-down (buck) switching power supply module delivers stable, adjustable voltage output from 0.8V to 30V for a wide range of electronics projects, DIY builds, prototyping, and bench power applications. With dual-channel output, up to 5A peak current per channel, and up to 90% conversion efficiency, this board is an essential addition to any electronics workbench or embedded system design.
Made in Mainland China.
Key Features
- Wide Input Range: Accepts 5V–32V DC input (input must be at least 2V higher than desired output)
- Adjustable Output: Dial in any voltage from 0.8V to 30V with precision 1% adjustable resistance
- High Efficiency: Up to 90% conversion efficiency minimizes heat generation and energy waste
- Dual-Channel Design: Two independent output channels for flexible circuit configurations
- 5A Peak Current: Handles up to 5A per channel (recommended sustained use: ≤3A / 30W per channel)
- Fixed 300kHz Switching Frequency: Reduces output ripple and allows use of smaller filter components
- Low Output Ripple: <100mV for clean, stable power delivery
- Low No-Load Current: Only 4mA draw when idle — ideal for battery-powered or always-on systems
- Wide Operating Temperature: -40°C to +85°C — reliable across extreme environments
- Unbalanced Load Protection: Built-in protection for unbalanced load conditions
- Compact Form Factor: 60 × 60 × 15 mm — fits easily into enclosures, PCB assemblies, and project boxes
Full Technical Specifications
| Input Voltage | 5V – 32V DC |
| Output Voltage | 0.8V – 30V (adjustable) |
| Output Current | 5A max (sustained: ≤3A / 30W per channel) |
| Switching Frequency | 300 kHz (fixed) |
| Conversion Efficiency | Up to 90% |
| Output Ripple | <100 mV |
| Output Accuracy | ±1% (precision adjustable resistor) |
| No-Load Current | 4 mA |
| Operating Temperature | -40°C to +85°C |
| Operating Humidity | 20% – 90% RH |
| Dimensions | 60 × 60 × 15 mm (L × W × H) |
| Battery Included | No |
| Country of Origin | Mainland China |
What's in the Box
- 1× DC-DC Step-Down Buck Power Supply Module
Important Notes
- Input voltage must be at least 2V higher than the desired output voltage.
- For sustained operation, keep output current at or below 3A (30W) per channel to ensure longevity.
- Color may vary slightly from images due to screen settings and lighting conditions.
- Please allow ±1–10mm measurement tolerance due to manual measurement.
Learn More About Power Electronics Safety
For guidance on the safe use of electrical and electronic components in DIY and professional settings, visit the U.S. Consumer Product Safety Commission (CPSC). For electrical safety standards and compliance information, refer to OSHA's Electrical Safety guidelines.
Frequently Asked Questions
Q: What is the difference between a DC-DC buck converter and a linear regulator?
A: A DC-DC buck (step-down) converter uses a switching mechanism operating at high frequency (in this case 300 kHz) to reduce voltage with very high efficiency — up to 90% in this module. A linear regulator dissipates excess voltage as heat, making it far less efficient, especially at higher current loads. For most electronics projects requiring voltage reduction, a buck converter is the preferred, energy-efficient choice.
Q: Can I use this module to charge batteries or power sensitive electronics?
A: Yes — the adjustable output (0.8V–30V) and precision 1% voltage accuracy make this module suitable for powering microcontrollers, sensors, LED strips, motors, and similar electronics. If using for battery charging, ensure you set the correct charging voltage for your battery chemistry and add appropriate charge control circuitry, as this module alone does not include a dedicated charge management IC.
Q: What does "dual-way" or dual-channel mean on this power supply module?
A: "Dual-way" means the module provides two independent output channels. Each channel can deliver up to 5A peak (3A sustained), allowing you to power two separate circuits or loads simultaneously from a single input source — a convenient feature for complex projects requiring multiple voltage rails.
Q: Does the input voltage need to be higher than the output voltage?
A: Yes. Because this is a step-down (buck) converter, the input voltage must always be at least 2V higher than the desired output voltage. For example, to get a 5V output, your input should be at least 7V. The module cannot boost voltage — it can only step it down.