LM2596 2A Buck Step-Down DC-DC Power Converter Module (4–40V to 1.3–37V) with LED Voltmeter

The LM2596 2A Buck Step-Down Power Converter Module is a high-efficiency DC-DC voltage regulator designed to safely convert higher DC voltages into a stable, adjustable lower voltage. With a wide input range of 4–40V DC and adjustable output from 1.3–37V DC, this module is ideal for DIY electronics, embedded systems, battery charging, LED projects, and power supply applications.

This module features a built-in LED voltmeter that allows you to monitor input or output voltage in real time without needing an external multimeter. The multi-turn precision potentiometer makes voltage adjustment smooth, accurate, and reliable.

Equipped with reverse polarity protection, short-circuit protection, and thermal shutdown, the LM2596 module ensures safe and stable operation even in demanding environments.

⚠️ Note: Maximum output current depends on input/output voltage, ambient temperature, and cooling. For high current applications, an external heatsink is recommended. Do not exceed 125°C to avoid permanent damage.

Key Features

• Wide input voltage range: 4V – 40V DC

• Adjustable output voltage: 1.3V – 37V DC

• 2A continuous output current (up to 3A with heatsink)

• Built-in LED voltmeter (input / output selectable)

• High efficiency up to 92%

• Precision multi-turn potentiometer for voltage adjustment

• Reverse polarity protection

• Output short-circuit protection

• Thermal shutdown protection

• Power-off memory for last displayed voltage

• Touch button to switch display ON/OFF

• Screw terminals for easy, solder-free wiring

Technical Specifications

• Regulator IC: LM2596

• Input Voltage: 4V – 40V DC

• Output Voltage: 1.3V – 37V DC (Adjustable)

• Output Current: 2A (Continuous), 3A (Max with heatsink)

• Switching Frequency: 150 kHz

• Efficiency: Up to 92%

• Voltage Display: 7-segment LED Voltmeter

• Regulation Type: Buck (Step-Down)

• Operating Temperature: -40°C to +85°C

• Cooling: External heatsink recommended for high current

Applications

• DIY electronics & prototyping

• Battery charging circuits

• Embedded system power supplies

• LED drivers & lighting projects

• Robotics & automation

• Arduino, ESP32, Raspberry Pi power regulation