Mini DC-DC 5V 3A Buck Converter Module – BEC Step Down Power Supply

The Mini DC-DC 5V 3A Buck Converter Module is an ultra-compact switching power supply designed to convert a higher DC input voltage into a regulated 5V DC output. With a small footprint and high current output capability, this step-down voltage regulator is ideal for powering microcontrollers, embedded systems, electronic circuits and other 5V devices.

Supporting an input voltage range of 7V to 26V DC, this mini buck converter delivers a fixed 5V output with a maximum output current of up to 3A, subject to input voltage, temperature and cooling conditions.

The module uses a high-performance fixed-frequency current-control switching controller to provide efficient voltage conversion. Its conversion efficiency can reach up to 96% under suitable operating conditions, helping reduce power losses and heat generation.

For additional operating protection, the module features overcurrent and overtemperature protection. Its ultra-small dimensions of just 17.5mm × 12mm × 4.3mm make it suitable for space-constrained applications where a conventional voltage regulator or larger DC-DC converter may not fit.

Whether you are building an Arduino project, powering an ESP32 board, developing an embedded electronic device or designing a compact power distribution circuit, this 5V 3A BEC buck converter provides a convenient DC power solution.

Key Features

• Fixed 5V DC Output: Converts higher DC input voltage into a regulated 5V supply.
• 3A Maximum Output Current: Supports output current up to 3A under suitable operating conditions.
• Wide Input Voltage Range: Accepts DC input voltages from 7V to 26V.
• High Conversion Efficiency: Offers conversion efficiency of up to 96% as specified.
• Overcurrent Protection: Provides protection against excessive output current.
• Overtemperature Protection: Helps protect the module during high-temperature operating conditions.
• Compact Miniature Design: Ultra-small PCB dimensions of 17.5mm × 12mm × 4.3mm.
• Switching Regulator Design: Uses a fixed-frequency current-control switching controller.
• Low Output Ripple: Specified output ripple of less than 30mV.
• Lightweight Construction: Weighs approximately 3 grams.
• BEC Power Supply Application: Suitable for compact battery-powered electronic systems and embedded applications.

Technical Specifications

How Does a DC-DC Buck Converter Work?

A DC-DC buck converter is a switching voltage regulator that reduces a higher DC input voltage to a lower DC output voltage.

For example, this module can convert a 12V or 24V DC power source into a regulated 5V output suitable for compatible electronic circuits.

Unlike a traditional linear voltage regulator, a switching buck converter uses high-frequency switching to regulate the output voltage more efficiently.

This helps minimize energy losses and heat generation, making it suitable for battery-powered devices and compact electronic systems.

Applications

The Mini 5V 3A Buck Converter can be used in various electronic and electrical projects:

• Arduino power supply projects
• ESP32 and ESP8266 development boards
• Microcontroller-based applications
• Embedded electronic systems
• Battery-powered devices
• RC models and BEC power applications
• Robotics and automation projects
• IoT devices and sensor networks
• Home automation systems
• LED lighting projects
• Electronic control circuits
• DIY power supply projects
• Portable electronic equipment
• Custom PCB power supply designs
• Voltage regulation for 5V electronic modules

Compact Design for Embedded Electronics

One of the major advantages of this mini DC-DC converter is its extremely small size.

Measuring just 17.5mm × 12mm × 4.3mm, it can be integrated into compact PCBs, embedded electronic assemblies and custom-designed devices where installation space is limited.

Its lightweight construction also makes it suitable for portable and battery-powered applications.

Protection and Reliable Operation

The module incorporates protection features designed to help safeguard the converter during abnormal operating conditions.

Overcurrent Protection: Helps protect the module when the output current exceeds its supported operating limit.

Overtemperature Protection: Helps prevent damage caused by excessive internal operating temperatures.

For reliable operation, ensure adequate ventilation and avoid continuously operating the converter at its maximum rated current without verifying thermal performance.

Package Includes

• 1 × Mini DC-DC 5V 3A BEC Buck Step Down Converter Module

Important Notes

• This module provides a fixed 5V DC output; it is not an adjustable-output buck converter.
• The supported input voltage range is 7V–26V DC.
• Maximum output current is rated at 3A, subject to input voltage, ambient temperature and thermal conditions.
• Maximum output power at 5V and 3A is 15W.
• Actual conversion efficiency depends on input voltage, output current and operating conditions.
• The stated output ripple and efficiency are manufacturer-specified values and may vary in practical applications.
• Check input polarity and output connections before powering the module.
• Provide suitable cooling and ventilation when operating at higher loads.
• Product images are representative. Minor variations in appearance and component layout may occur between manufacturing batches.