5-Pack LM2596S Step-Down Voltage Regulator Module w/ Display

5-Pack LM2596S Adjustable Step-Down Voltage Regulator Modules with Digital Display

Get precise, adjustable DC power output for your electronics projects with this 5-pack of LM2596S Step-Down Voltage Regulator Modules. Each module features a built-in digital voltage display, tool-free terminal block connections, and a wide input/output range — making them ideal for hobbyists, engineers, and makers working on power supply circuits, DIY electronics, robotics, and more. Made in Mainland China.

Key Features

• Wide Input Range: Accepts 4.0V–40V DC input and delivers a stable adjustable output of 1.25V–37V
• High Output Current: Stable 2A continuous output; up to 3A peak (add a heatsink for currents above 2A)
• High Conversion Efficiency: Up to 92% efficiency with a 150kHz internal switching frequency for minimal power waste
• Low Ripple Output: Output ripple under 30mV for clean, stable power delivery
• Digital Voltage Display: Built-in voltmeter display can be toggled on/off — press and hold the switch for 1–4 seconds to turn it on/off; once on, a single press toggles the display
• No-Solder Setup: Screw-terminal block included for fast, tool-free wiring; solder pads also available for hardwired installations
• Wide Operating Temperature: Functions reliably from -45°C to +85°C
• Compact Form Factor: 6.6 × 3.5 × 1.4 cm — fits neatly into enclosures and prototyping boards
• ABS Housing: Durable ABS material for everyday project use

Important Usage Notes

• Input voltage must be at least 1V higher than the desired output voltage.
• Factory default output is set to approximately 20V. If the output cannot be adjusted and matches the input, turn the potentiometer counterclockwise more than 10 full turns to reset, then re-adjust normally.
• For output currents exceeding 2A, attach a heatsink to prevent thermal throttling.

Specifications

Package Contents

• 5 × LM2596S Step-Down Voltage Regulator Module with Digital Display

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Frequently Asked Questions

Q: What is the difference between the step-down (buck) function and a boost converter on these LM2596S modules?

A: These modules are step-down (buck) regulators — they reduce a higher DC input voltage to a lower, adjustable DC output voltage. The input must always be at least 1V higher than your target output. They are not boost converters; the "boost" in the product name refers to their high-efficiency output capability, not a voltage-boosting function.

Q: Can I connect these modules in parallel to get more than 3A of output current?

A: Parallel operation of voltage regulator modules is generally not recommended without proper current-sharing circuitry, as minor voltage differences between modules can cause uneven current distribution. For higher current needs, use a single module rated for your required amperage, or consult your circuit design specifications.

Q: Do I need to solder anything to use these LM2596S step-down modules?

A: No soldering is required. Each module includes a screw-terminal block for connecting input and output wires quickly and securely. Solder bond pads are also available on the board if you prefer a permanent hardwired connection.

Q: Why is my output voltage stuck at the same level as the input voltage?

A: This is a known factory default behavior. The module ships preset to approximately 20V output. If the potentiometer adjustment seems unresponsive, turn the potentiometer counterclockwise for more than 10 full turns to reset it, then gradually adjust to your desired output voltage.

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.