MP1484 3A DC-DC Step-Down Power Supply Module (Fixed / Selectable Output)

When your electronics project requires a highly specific, unwavering logic voltage, mechanical adjustment potentiometers can sometimes be a liability if they drift due to intense physical vibration or temperature changes. The MP1484 fixed-output buck converter solves this problem beautifully by incorporating an innovative solder-pad array on the back of the printed circuit board. While you can use the onboard potentiometer to dial in a custom voltage, you also have the option to bypass the potentiometer entirely. By simply cutting a tiny trace and bridging a dedicated solder pad, you instantly lock the module to a permanent, factory-set 1.8-Volt, 2.5-Volt, 3.3-Volt, 5-Volt, 9-Volt, or 12-Volt output.

Built around the monolithic MP1484 synchronous switching regulator, this module readily accepts input voltages ranging from 4.75 Volts up to 18 Volts. Operating at a fixed 340 kHz switching frequency, it requires minimal onboard filtering components, keeping its physical footprint incredibly small while comfortably delivering up to 3 Amps of continuous load current. It is an outstanding, vibration-proof power solution for robotics, drones, and rugged industrial enclosures where an accidental voltage bump could destroy sensitive microcontrollers.

Key Features & Functional Advantages

• Dual-Mode Output: Offers both a standard precision potentiometer for fully custom voltages and a set of rear solder pads for locking in standard fixed voltages.

• Vibration-Proof Reliability: By using the fixed solder pads, the output voltage becomes completely immune to mechanical vibrations that would normally throw a standard potentiometer out of calibration.

• Synchronous Rectification: Integrates low-resistance internal MOSFETs to achieve up to 95 percent conversion efficiency, drastically reducing thermal waste and maximizing battery life.

• Compact Footprint: The high 340 kHz switching frequency allows for the use of small onboard inductors and capacitors, making the module extremely easy to hide in tight enclosures.

• Comprehensive Protection: Features built-in hardware safeguards including cycle-by-cycle over-current protection, thermal shutdown, and an adjustable soft-start to prevent destructive inrush current spikes.

Perfect For

• High-Vibration Environments: The absolute best choice for drones, RC vehicles, and mobile robotics where continuous mechanical shaking would typically alter a standard adjustable converter.

• Dedicated Logic Power: Locking in a permanent 3.3-Volt or 5-Volt power rail to safely run ESP-based Wi-Fi modules, standard development boards, and delicate sensor arrays without fear of over-voltaging.

• Custom Automotive Builds: Stepping down a car's noisy, fluctuating 12-Volt system to a perfectly stable fixed output for custom dashboard displays and networking gear.

• Mass Production Prototyping: Ideal for testing custom DIY hardware where you need absolute certainty that your input voltage will not accidentally change during bench testing.

Technical Specifications

• Device Type: DC-DC Step-Down (Buck) Switching Converter

• Main Control Chip: MP1484EN

• Input Voltage Range: 4.75 Volts to 18.0 Volts DC

• Selectable Fixed Outputs: 1.8V, 2.5V, 3.3V, 5.0V, 9.0V, 12.0V (Via rear solder pads)

• Adjustable Output Range: 0.925 Volts to 15.0 Volts DC (Via potentiometer)

• Maximum Output Current: 3.0 Amps (Continuous)

• Switching Frequency: 340 kHz

• Maximum Efficiency: Up to 95 percent

Ensure your order is placed by 2PM to guarantee next-day delivery! Our commitment to prompt service includes a 24-hour delivery system through our network of carriers, aimed at ensuring your package arrives right on schedule.

Please note, a delivery fee of €4.99 applies for orders under €50. For those in remote areas, be aware that our couriers may apply an extra surcharge. This additional fee helps cover the costs of transporting your items to harder-to-reach locations.