DC-DC Step-Down Converter 9V–36V to 5V 3A Dual USB Power Module

DC-DC Step-Down Power Module with Dual USB Output

Power your USB devices anywhere — in your car, off-grid solar setup, or DIY electronics project — with this compact DC-DC step-down (buck) converter. Featuring a wide input voltage range of 9V to 36V and a regulated 5V / 3A dual USB output, this module handles everything from 12V automotive systems to 24V and 36V solar panels with ease.

Key Specifications

• Input Voltage: 9V – 36V DC (compatible with 9V, 12V, 24V, 36V systems)
• Output Voltage: 5V DC (regulated, load end ~5V accounting for line loss)
• Maximum Output Current: 3A (stable continuous output: 2A without heatsink)
• Dual USB Ports: Charge two devices simultaneously
• Board Dimensions: 5 × 3.5 cm — ultra-compact for easy integration
• Package Includes: 1 × DC-DC Step-Down Converter Module

Why Choose This Power Module?

• ✅ Wide voltage compatibility — works with 9V, 12V, 24V, and 36V input sources
• ✅ Dual USB charging ports — charge phones, tablets, or other USB devices simultaneously
• ✅ Stable regulated 5V output — protects your devices from voltage spikes
• ✅ Perfect for car, solar, and DIY projects — versatile use cases for makers and hobbyists
• ✅ Compact form factor — easy to mount or embed in enclosures

Ideal Use Cases

• Car and vehicle 12V/24V USB charging solutions
• Solar panel power systems (12V, 24V, 36V)
• DIY electronics and maker projects
• Robotics, Arduino, and Raspberry Pi power supplies
• Off-grid and portable power setups

Important Safety Notes

⚠️ Note 1: Observe correct polarity (positive/negative). Do NOT exceed 36V input — exceeding this limit may permanently damage the chip.

⚠️ Note 2: While the module is powered and operating, do NOT touch the sampling resistors or IC components on the circuit board — doing so may cause sudden voltage fluctuations that could damage connected equipment.

⚠️ For continuous output above 2A, a heatsink is strongly recommended to maintain stable performance and component longevity.

Made in Mainland China.

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External Resources

For guidance on electronics safety and consumer product standards, visit the U.S. Consumer Product Safety Commission (CPSC). For electrical and measurement standards relevant to power modules, see NIST – National Institute of Standards and Technology.

Frequently Asked Questions

Q: What input voltages does this DC-DC step-down converter support?

A: This module accepts a wide input voltage range of 9V to 36V DC, making it compatible with 9V, 12V, 24V, and 36V power sources such as car batteries, solar panels, and DC power supplies. Do not exceed 36V input to avoid chip damage.

Q: How much current can the dual USB ports output?

A: The module supports a maximum output current of 3A total. Without an attached heatsink, the stable continuous output is limited to 2A. For sustained loads above 2A, adding a heatsink is strongly recommended.

Q: Can I use this module for solar charging applications?

A: Yes! This step-down converter is well-suited for solar power systems operating at 12V, 24V, or 36V. It steps the voltage down to a stable 5V USB output, allowing you to charge phones, tablets, and other USB devices directly from your solar setup.

Q: Is this module safe to use in a car?

A: Absolutely. Standard 12V and 24V automotive electrical systems fall well within the 9V–36V input range of this module. It provides a stable, regulated 5V output through dual USB ports — perfect for in-vehicle USB charging of multiple devices.

Q: What are the physical dimensions of this power module?

A: The board measures 5 cm × 3.5 cm, making it compact enough to integrate into custom enclosures, vehicle dashboards, or DIY electronics projects with minimal space requirements.