LM2596 Buck Converter | Step-Down Voltage Regulator Module
LM2596 Buck Converter
The LM2596 Buck Converter is a step-down DC-DC module built around the LM2596 switching regulator IC. It efficiently reduces a higher input voltage to a lower, adjustable output voltage, making it a staple for prototyping and battery-powered projects. The module delivers up to 3A of stable current, with an output range you can tune from 1.25V to 37V using the onboard trimmer.
Key Specifications
| Specification | Value |
|---|---|
| Input Voltage Range | 4.5V – 40V DC |
| Output Voltage Range | 1.25V – 37V (adjustable) |
| Maximum Output Current | 3A (requires adequate heatsinking) |
| Efficiency | Up to 92% |
| Switching Frequency | 150 kHz |
| Built-in Protections | Thermal shutdown, current limiting |
What You Can Build With This
- Variable bench power supply from an old laptop adapter
- Power Arduino or ESP32 from a 12V lead-acid battery
- Step down 24V to 5V for industrial sensors and relays
- Charge a Li-ion battery with constant voltage termination
Compatibility
The module accepts any DC source between 4.5V and 40V. It can power most 5V and 3.3V development boards (Arduino Uno, Raspberry Pi, ESP8266) when set to the correct output. It pairs well with higher-voltage battery packs, solar panels, and automotive electrical systems. Ensure the input voltage is always at least 2V higher than the desired output for stable regulation.
Wiring Notes
Solder input wires to IN+ and IN – terminals, observing polarity. Connect your load to OUT+ and OUT –. Use a multimeter to adjust the brass potentiometer before attaching sensitive electronics. For loads above 1.5A, secure a small heatsink to the IC and keep the module in free air.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino?
Yes. Set the output to 5V (or 3.3V for 3.3V boards) and connect to the Vin pin or barrel jack. Always verify the voltage with a multimeter first.
What is the maximum current I can pull?
3A, but only if you add a heatsink and ensure adequate ventilation. At 2A continuous without a heatsink, the module may overheat and shut down.
How do I adjust the output voltage?
Turn the small brass potentiometer on the board clockwise to increase voltage, counterclockwise to decrease. Use a voltmeter on the output terminals while tuning.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
What you can build with this
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items