35W DC-DC Buck-Boost Converter Module 5V-30V Adjustable

35W DC-DC Buck-Boost Converter Module – Stable Voltage & Current Control

This compact and powerful 35W DC-DC Buck-Boost Converter Module gives you precise, adjustable voltage output whether you need to step up or step down from your input source. With an input range of 5V–30V and an adjustable output of 0.5V–30V, it's an incredibly versatile power regulation solution for electronics projects, battery charging, LED drivers, audio amplifiers, and more.

Key Features

• Buck-Boost Dual Function: Outputs voltage either higher or lower than input — true buck-boost design for maximum flexibility.
• High Efficiency: Conversion efficiency of 87–91% (step-up) and 87–89% (step-down) to minimize heat and energy waste.
• Stable Output: Ultra-low output fluctuation of just 20mV at 12V/3A — ideal for sensitive audio amplifiers, artificial circuits, and speaker systems.
• Multi-Protection System: Built-in input over-current protection (5A fuse), input under-voltage protection, output over-current protection, and MOS input anti-reverse protection for safe, reliable operation.
• Battery Charging Compatible: Supports constant current/constant voltage (CC/CV) charging for lithium batteries, storage batteries, AA rechargeable batteries, and LED brightness adjustment.
• Intuitive LED Indicators: Red & blue = constant current charging; blue only = constant voltage charging; blue & green = nearly full; green only = fully charged.
• Compact Form Factor: Small 69×28×21mm footprint fits easily into enclosures and DIY builds.

Technical Specifications

What's in the Box

• 1 × DC-DC Buck-Boost Converter Module

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Made in Mainland China.

Learn more: ENERGY STAR product efficiency guidance

Frequently Asked Questions

Q: Can this DC-DC buck-boost module output a voltage higher than the input?

A: Yes! Unlike a standard step-down (buck) converter, this module is a true buck-boost converter. It can output a voltage either higher or lower than the input voltage, anywhere within the 0.5V–30V output range, as long as your input is between 5V and 30V.

Q: Is this module suitable for charging lithium batteries?

A: Absolutely. The module supports constant current (CC) and constant voltage (CV) modes, making it well-suited for charging lithium batteries, storage batteries, and AA rechargeable batteries. The onboard LED indicators show you the charging status in real time.

Q: What protections does this module have?

A: This converter includes multiple built-in protections: input over-current protection (5A fuse), input under-voltage protection, output over-current protection, and MOS input anti-reverse protection — helping safeguard both the module and your connected devices.

Q: Can I increase the power output beyond 35W?

A: Yes. With enhanced heat dissipation (e.g., adding a heatsink or active cooling), the module can handle up to 4A output current and up to 60W output power. Standard use is rated at 35W / 3A.

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.