5V-32V Input to 1.5V-35V Output XL6009 Boost Buck Step Up Step Down DC-DC Converter

📋 Overview

This versatile boost-buck DC-DC converter module accepts any input voltage from 5V to 32V and converts it to any adjustable output from 1.5V to 35V — stepping voltage both up and down with a single module. Based on the XLSEMI XL6009 chip, it uses a two-stage conversion design (boost then buck) to deliver a regulated output regardless of whether your target voltage is higher or lower than your input. An onboard multi-turn potentiometer lets you dial in your exact target voltage with precision.

⚠️ Important: Do not exceed 32V input or 35V output. This module does not include short-circuit or reverse polarity protection — always install a fuse on the input side and double-check polarity before powering on.

⭐ Key Features

• Boost and Buck in One Module: Steps voltage both up and down — output can be higher or lower than the input
• Wide Input Range: Accepts 5V to 32V DC input
• Wide Adjustable Output: Output continuously adjustable from 1.5V to 35V via onboard multi-turn potentiometer
• High Efficiency: Up to 94% conversion efficiency with MOSFET switching
• High Switching Frequency: 400KHz for low output ripple and fast transient response
• 1.5A Max Output Current: Supports a wide range of loads
• Compact Design: Small 48 × 25 × 14 mm (1.89 × 0.98 × 0.55 in) PCB fits easily into tight enclosures
• Industrial Temperature Range: Operates from −40°C to +85°C

📊 Specifications

📌 Pinout

🚀 Getting Started

1. Connect your DC power source (5V–32V) to the IN+ and IN− pads.
2. With the output disconnected, attach a multimeter to OUT+ and OUT− (DC voltage mode).
3. Turn the onboard potentiometer to set your desired output voltage (clockwise = increase, counter-clockwise = decrease).
4. Connect your load to OUT+ and OUT−, then verify the voltage under load and fine-tune if needed.

💡 Tip: See our complete User Guide for detailed wiring instructions, how the two-stage conversion works, troubleshooting tips, and best practices.

🔋 How It Works

Unlike a simple boost or buck converter, this module uses a two-stage conversion process:

1. Stage 1 — Boost: The input voltage is first stepped up to an internal voltage above 35V.
2. Stage 2 — Buck: This high internal voltage is then stepped down to the output voltage you've set with the potentiometer.

This two-stage approach allows the module to output a voltage that is either higher or lower than the input — something a single-stage converter cannot do. The trade-off is slightly lower efficiency compared to a dedicated single-stage converter.

🎯 Applications

• Regulating a stable output from variable input sources (batteries, solar panels, etc.)
• Powering 3.3V or 5V devices from higher-voltage battery packs
• Stepping up battery voltage for LED strips or LED drivers
• Adjustable bench power supply from a fixed DC source
• Solar panel voltage regulation where input varies with sunlight conditions
• Automotive projects where accessory voltage differs from the vehicle's supply
• DIY and hobby electronics projects requiring flexible voltage conversion

⚠️ Important Notes

• This module can step voltage both up and down, but efficiency is lower than a dedicated single-stage boost or buck converter (80%–94%).
• No short-circuit protection — always install an inline fuse on the input side.
• No reverse polarity protection — connecting input with reversed polarity will permanently damage the module.
• Maximum output current is 1.5A — lower than the boost-only XL6009 (2.5A).
• For loads exceeding 1A, add a heatsink to prevent thermal shutdown.
• Always set the output voltage before connecting your load to avoid damaging sensitive electronics.

📦 What's in the Box

• 1x XL6009 Adjustable Boost Buck Step-Up Step-Down DC-DC Converter Module

📄 Documentation & Resources

• XL6009 Boost Buck Converter User Guide
• All Boost Buck Converter User Guides & Tutorials