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LM2596 DC-DC Buck Converter 3A Adjustable Voltage Regulator Module — Ultra Small (2pcs)
LM2596 DC-DC Buck Converter 3A Adjustable Voltage Regulator Module Ultra Small (2pcs)
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LM2596 DC-DC Buck Converter — 3A Adjustable Voltage Regulator Module
A compact and efficient LM2596-based switching buck converter module with onboard potentiometer for continuous output voltage adjustment from 1.25V to 37V. With up to 3A output current and ~92% efficiency, it significantly outperforms linear regulators (LM317, AMS1117) in heat generation and power loss. Comes in a 2-piece pack.
Key Specifications
| Parameter | Value |
|---|---|
| IC | LM2596 (switching regulator) |
| Input Voltage | 4V – 40V DC |
| Output Voltage | 1.25V – 37V (adjustable via potentiometer) |
| Output Current | 3A (max, with heatsinking) |
| Switching Frequency | 150kHz |
| Efficiency | Up to 92% |
| Ripple Voltage | <30mV (typ.) |
| Load Regulation | ±0.5% |
| Connection | Screw terminals (IN+/IN−, OUT+/OUT−) |
| Protection | Thermal shutdown, current limiting |
| Quantity | 2 PCS |
Why Choose LM2596 Over LM317?
| Feature | LM2596 (Switching) | LM317 (Linear) |
|---|---|---|
| Efficiency | Up to 92% | ~40–60% |
| Heat Generation | Low | High (wastes as heat) |
| Output Current | 3A | 1.5A |
| Heatsink Required | Rarely | Often at high current |
| Ripple | <30mV | Near zero |
Compatible With / Works With
- Arduino UNO/Nano/Mega (5V from 12V adapter)
- ESP32 / ESP8266 (3.3V from 9V–12V source)
- Raspberry Pi 4B (5V/3A from 12V source)
- LED strip drivers (12V regulated from 24V supply)
- RC car / drone onboard electronics (5V from 2S–3S LiPo)
Typical Applications
- Arduino/ESP32 Power — efficient 5V/3.3V from 12V wall adapter
- RC Vehicle Electronics — 5V BEC from 3S LiPo (12.6V) for servo and receiver
- LED Driver — constant voltage 12V from 24V supply for LED strips
- Solar Power System — 12V panel to 5V USB charging output
- Bench Power Supply — adjustable 1.25–37V from fixed 40V source
FAQ
Q: Can LM2596 module power a Raspberry Pi 4?
A: Yes. Set output to 5.1V and ensure input is at least 7V. The Pi 4 can draw up to 3A peak — the LM2596 handles this with adequate input voltage and minimal voltage drop.
Q: Why is my output voltage unstable?
A: Ensure input voltage is at least 1.5V above desired output (dropout). Add a 100μF electrolytic capacitor on the output for stability. Avoid very light loads (<100mA) which can cause instability in some LM2596 modules.
Q: Does LM2596 need a heatsink?
A: At full 3A output with large voltage drop (e.g., 24V in, 5V out), yes. At typical loads (<1.5A), the onboard copper pour provides sufficient cooling.
Package Contents
- 2× LM2596 DC-DC Buck Converter 3A Adjustable Voltage Regulator Module
