SPECIFICATIONS

MP1584EN Ultra-Small DC-DC Step-Down Module: 3A Output, 4.5-28V Wide Input, Adjustable Voltage up to 20V, 96% Efficiency – Perfect Replacement for LM2596, Ideal for Space-Constrained Projects!

Key Features & Benefits:

📦 Ultra-Compact Size, Saves Space: Only 22×17×4mm – smaller than a coin! Ideal for space-limited applications like drones, portable devices, and wearables.

⚡ Wide Input Voltage, Flexible Power: Accepts 4.5V-28V DC, compatible with single-cell Li-ion, 2-6S LiPo, 12V/24V automotive, and industrial supplies.

🔧 Continuously Adjustable Output: Precision potentiometer allows output voltage from 0.8V to 20V – easily set 3.3V, 5V, 9V, 12V, etc.

💪 3A Peak Output Current: Rated 3A continuous, suitable for motors, LED strips, development boards, and other medium-power loads.

🔋 High Efficiency, Low Heat: MP1584EN synchronous rectification delivers up to 96% efficiency, minimizing heat – often no heatsink needed.

🛠️ Easy to Use, Broad Compatibility: Standard 2.54mm pads for soldering headers or wires. Perfect for Arduino projects, direct replacement for LM2596 modules.

Product Description:

The MP1584EN is an ultra-compact DC-DC step-down module based on the genuine MPS (Monolithic Power Systems) chip. It efficiently steps down input voltages up to 28V to an adjustable output from 0.8V to 20V, delivering up to 3A of load current. With a 1MHz switching frequency, output ripple is as low as 30mV. Its tiny footprint makes it the ideal choice for space-constrained projects. Whether you're building a DIY power bank, powering a drone receiver, retrofitting automotive electronics, or creating a bench power supply, the MP1584EN handles it with ease.

🚨 Critical Notes Before Use!

❌ 【Product Clarification】: This is anadjustable buck module, NOT a fixed-output power supply!
The output voltage must be set by you. Default voltage may be random. ALWAYS measure and adjust with a multimeter before connecting your load to avoid overvoltage damage.

⚠️ 【Most Common Misconceptions & Misuse】

Input voltage MUST NOT exceed 28V! Exceeding 28V DC will destroy the module.
Output current rating: 3A is peak; for continuous operation, keep below 2.5A and ensure adequate cooling.
Adjust carefully: The trimming potentiometer is delicate. Turn gently and slowly to avoid damage or sudden voltage spikes.
Input/output capacitors are essential: You must add electrolytic capacitors (≥100µF recommended) across input and output to filter ripple and prevent oscillation. The module does not include these capacitors.
Step-down limitation: This is a BUCK converter. Output voltage must be at least 1V lower than input voltage (dropout requirement). For 5V output, input must be ≥6V.
Load type considerations: Suitable for resistive, capacitive loads, most DC motors, and LEDs. Not suitable for directly charging batteries (requires a charge management circuit).

✅ 【Correct Usage Steps】

Soldering: Solder headers or wires as needed (observe polarity: IN+, IN- for input; OUT+, OUT- for output).
Add capacitors: Solder electrolytic capacitors (≥100µF) across input and output to reduce ripple.
Adjust voltage: Apply input power (no load). Measure output voltage with a multimeter and slowly turn the potentiometer to your desired voltage.
Connect load: Disconnect power, then connect your load correctly.
Power on: Reapply power and verify operation.

🔧 【Important Notes】

Dimensions: 22×17×4mm; ensure adequate space. Pad spacing is 2.54mm.

Heat dissipation: For currents >2A or high ambient temperatures, a heatsink is recommended (available in our kit). You can also attach it to a metal enclosure with thermal adhesive.

Efficiency: Actual efficiency depends on input-output voltage difference and load. Best efficiency occurs with moderate load and small voltage differential.

Applications: Ideal for DIY power banks, surveillance camera power, toy car power supplies, drone receivers, communication equipment backups – any place where size and weight are critical.

Specifications

Model: MP1584EN Buck Module

Input Voltage: DC 4.5V – 28V

Output Voltage: DC 0.8V – 20V (Adjustable)

Output Current: 3A (rated, with heatsinking)

Switching Frequency: 1MHz typical (1.5MHz max)

Output Ripple: < 30mV

Efficiency: Up to 96%

Operating Temp: -40°C to +85°C

Dimensions: 22mm × 17mm × 4mm (L×W×H)

Weight: Approx. 3g

Package Includes

1 × MP1584EN DC-DC Step-Down Module

Note: Input/output wires, capacitors, and heatsink are NOT included – choose our kit versions if needed.