Description
Product Overview
The LM2596/LM2576 DC-DC Buck Converter Module is a high-efficiency step-down switching regulator designed to convert higher DC voltages (such as 12V, 24V, or 36V) into a stable lower voltage, most commonly 5V . Based on the industry-standard LM2596 or LM2576 chipset from Texas Instruments (formerly National Semiconductor), this module provides a simple, reliable, and efficient solution for powering 5V devices from automotive batteries, industrial power rails, or solar-charged battery banks .
Unlike traditional linear voltage regulators that dissipate excess energy as heat, this switching regulator utilizes Pulse Width Modulation (PWM) technology to achieve conversion efficiencies of up to 90% or higher . This means it runs much cooler and wastes significantly less power, making it ideal for battery-powered or enclosed applications. The module is capable of delivering up to 3A of continuous output current, enough to power an Arduino, Raspberry Pi, a high-power LED strip, or simultaneously charge two smartphones .
This product is often available in two common configurations: a fixed 5V output version (ideal for USB charging and 5V logic systems) and an adjustable version (allowing you to set any output voltage between 1.25V and 35V via a precision potentiometer) . Many modules also feature a dual USB output option, making them perfect for custom car chargers or portable power stations .
Key Features
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High-Efficiency Step-Down Conversion: Utilizes LM2596 (150kHz) or LM2576 (52kHz) switching regulator ICs to achieve efficiency up to 92%, minimizing power loss and heat generation compared to linear regulators .
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Wide Input Voltage Range: Accepts DC input from 4.5V up to 40V, making it compatible with common 5V USB, 12V automotive, 24V industrial, and even 36V solar panel systems .
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3A High Output Current: Capable of delivering up to 3A of continuous output current. For loads above 2.5A, a heatsink is recommended to maintain optimal performance .
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Fixed 5V or Adjustable Output: Choose between a fixed 5V version (ideal for USB devices) or an adjustable version (1.25V–35V) with an onboard precision potentiometer for fine-tuning .
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Integrated USB Output Options: Many models feature a dual USB-A output port with smart identification chips for charging Android and iOS devices simultaneously .
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Comprehensive Protection: Includes over-current protection (OCP), thermal shutdown, and short-circuit protection to safeguard the module and your connected devices .
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Low Output Ripple: Delivers clean power with output ripple typically less than 30mV, suitable for sensitive electronics like microcontrollers and audio equipment .
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Compact and Lightweight: Small PCB footprint (approx. 43mm × 21mm) with screw terminals or USB ports for easy integration into various projects .
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Industrial Temperature Range: Designed to operate reliably from -40°C to +85°C, suitable for harsh environments .
Technical Specifications
| Parameter | Operating Value |
|---|---|
| Input Voltage | DC 4.5V – 40V (Typical: 5V, 12V, 24V, 36V) |
| Output Voltage | Fixed: 5V / Adjustable: 1.25V – 35V |
| Output Current | 3A (Max), 2A – 2.5A Recommended (with heatsink >2A) |
| Switching Frequency | LM2596: 150kHz / LM2576: 52kHz |
| Conversion Efficiency | Up to 92% (Higher at higher output voltages) |
| Output Ripple | ≤ 30mV (Typical) |
| Load Regulation | ± 0.5% |
| Voltage Regulation | ± 0.5% |
| Operating Temperature | -40°C to +85°C (Industrial Grade) |
| Module Dimensions | Approx. 43mm × 21mm × 14mm (varies by model) |
| Weight | Approx. 20g – 30g |
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