DC 6V–40V to 5V 3A Dual USB Step-Down Converter LM2596
DC 6V–40V to 5V 3A Dual USB Step-Down Converter LM2596
DC to DC Dual USB Step-Down Converter Module – LM2596
Power your DIY projects with confidence using this compact and highly efficient DC-DC Step-Down (Buck) Converter Module. Built around the LM2596 chip, it accepts a wide input voltage range of 6V to 40V and delivers a stable 5V / 3A output via dual USB ports — perfect for charging smartphones, MP3 players, MP4 devices, tablets, and other USB-powered gadgets directly from car batteries, solar panels, lead-acid batteries, or any compatible DC power source.
With an impressive 92% conversion efficiency and built-in short circuit protection, this module is a reliable choice for makers, engineers, and hobbyists who need regulated 5V USB power in automotive, off-grid, or bench-top applications.
Made in Mainland China.
Key Features
- Wide Input Range: Accepts 6V to 40V DC input (ideal for 12V and 24V systems)
- Stable 5V Output: Fixed 5V output voltage for universal USB device compatibility
- Dual USB Ports: Charge two devices simultaneously at up to 3A total output
- High Efficiency: Up to 92% conversion efficiency minimises heat and energy waste
- Short Circuit Protection: Built-in safeguard against overload and short circuits
- Wide Operating Temperature: Reliable performance from -40°C to +85°C
- Compact Form Factor: Only 59mm × 21mm × 17mm — fits tight spaces and custom enclosures
- 150 kHz Switching Frequency: Smooth, stable regulation with minimal ripple
Technical Specifications
| Input Voltage | 6V – 40V DC |
| Output Voltage | 5V (fixed) |
| Output Current | 3A (max) |
| Switching Frequency | 150 kHz |
| Conversion Efficiency | Up to 92% |
| Operating Temperature | -40°C to +85°C |
| Color | Red |
| Dimensions | 59mm × 21mm × 17mm |
| Chip | LM2596 |
What's in the Box
- 1 × DC-DC Step-Down Converter Module (LM2596, Dual USB)
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Learn more: EPA guidance on lithium-ion battery handling
Frequently Asked Questions
Q: What input voltage range does this DC-DC step-down converter module support?
A: This LM2596-based step-down converter accepts a wide input voltage range of 6V to 40V DC, making it compatible with common power sources such as 12V car batteries, 24V truck systems, and solar or lithium battery packs.
Q: How many devices can I charge at once with this module?
A: The module features two USB ports, allowing you to charge two devices simultaneously. The total combined output is up to 3A at a stable 5V, suitable for smartphones, MP3/MP4 players, and other standard USB-powered devices.
Q: Is this module safe to use in automotive or DIY electronics projects?
A: Yes. The module includes built-in short circuit protection and operates reliably across a wide temperature range (-40°C to +85°C), making it well-suited for automotive, robotics, off-grid, and bench-top DIY electronics applications.
Q: What are the physical dimensions of this converter module?
A: The module measures 59mm × 21mm × 17mm — a very compact size that fits easily into custom enclosures, project boxes, or vehicle dashboards.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.