DC-DC Adjustable Step-Down Converter Module – LM2596

Adjustable DC-DC Step-Down Power Supply Converter Module

Take full control of your voltage requirements with this compact and efficient DC-DC step-down (buck) converter module. Built around the high-performance LM2596 chip, this module delivers up to 92% conversion efficiency with minimal heat generation — making it ideal for electronics prototyping, DIY projects, automotive accessories, and powering a wide range of devices.

Key Features

• High-Quality LM2596 Chip: Delivers up to 92% conversion efficiency with low heat output.
• Wide Input Voltage Range: Accepts 3.2V–40V input, outputs adjustable 1.25V–35V.
• Adjustable Output: Simple potentiometer dial lets you set your exact output voltage with ease.
• Up to 3A Output Current: Handles up to 3A peak; recommended ≤2.5A for continuous use. Add a heatsink for outputs over 10W.
• Machine-Mounted & Reflow Soldered: Precision manufacturing ensures consistent quality and reliability.
• Aging Test Verified: Each module undergoes a 2-hour burn-in/aging test before shipment for assured reliability.
• Car-Friendly: Connect directly to a vehicle's cigarette lighter socket to power phones, MP3/MP4 players, and other USB or low-voltage devices on the go.

Technical Specifications

• Module Type: Non-isolated step-down (buck) converter
• Input Voltage: 3.2V – 40V
• Output Voltage: 1.25V – 35V (adjustable)
• Output Current: 3A (maximum); ≤2.5A recommended for sustained use
• Conversion Efficiency: Up to 92%
• Switching Frequency: 150 kHz
• Output Ripple: ≤30 mV
• Load Regulation: ±0.5%
• Voltage Regulation: ±2.5%
• Operating Temperature: -40°C to +85°C
• Dimensions: 44 × 21 mm

What's in the Box

• 1 × DC-DC Adjustable Step-Down Converter Module

Made in China.

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Frequently Asked Questions

Q: What is a DC-DC step-down converter module used for?

A: A DC-DC step-down (buck) converter module takes a higher input voltage and reduces it to a lower, adjustable output voltage. It is commonly used in electronics projects, prototyping, automotive setups, and powering devices like phones, MP3 players, microcontrollers, and sensors that require a specific voltage lower than the available power source.

Q: What is the maximum continuous current this module can supply?

A: The module supports up to 3A peak output current. For long-duration continuous operation, it is recommended to keep the current at or below 2.5A. If your application exceeds 10W of output power, adding an external heatsink to the module is strongly advised to maintain stable performance.

Q: Can I use this module in my car?

A: Yes. Simply connect the module's input terminals to your vehicle's cigarette lighter socket (which typically supplies 12V), then adjust the output potentiometer to your desired voltage. This makes it a versatile in-car power adapter for charging devices or powering low-voltage electronics on the go.

Q: How do I adjust the output voltage?

A: The output voltage is adjusted by turning the onboard potentiometer (trim pot). Rotate it clockwise or counterclockwise to increase or decrease the output voltage anywhere within the 1.25V–35V range. Using a multimeter to monitor the output while adjusting is recommended for precision.

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.