I6A2-5V Step-Down DC-DC Converter Module – Fixed 5V 3A Output

The I6A2-5V is a non-isolated step-down (buck) DC-DC converter module designed to provide a stable, fixed 5V output from a higher DC input source. It accepts an input voltage range of 4.5V to 28V DC, with the requirement that the input remains at least about 1V above the 5V output, and delivers a maximum output current of 3A—with approximately 2.5A recommended for long-duration continuous operation. Conversion efficiency reaches up to 92%, which keeps heat generation low and allows the module to operate without an additional heatsink across its -40°C to +85°C working range.

Output ripple is specified at less than 50 mV, making the supply suitable for noise-sensitive digital and analog circuits. The module includes short-circuit and overload protection, so connected devices are safeguarded against common fault conditions. Its compact 16.5 × 22 mm footprint fits easily into space-constrained enclosures, and the low 3 g weight makes it suitable for portable and embedded designs. Typical uses include powering USB devices, Arduino, ESP8266 and ESP32 boards, HC-05 Bluetooth and NRF24L01 radio modules, as well as sensors and small actuators that require a clean, fixed 5V rail. This I6A2-5V step-down converter is a practical choice for projects that need an efficient, protected 5V supply from a 12V, 24V, or other higher-voltage DC source.

1. Powering USB devices and 5V peripherals from a higher-voltage DC source.
2. Supplying Arduino, ESP8266, and ESP32 microcontroller boards.
3. Powering HC-05 Bluetooth and NRF24L01 radio communication modules.
4. Providing a clean 5V rail for temperature, motion, and other sensors.
5. Driving small relays, actuators, and low-power motors that require 5V.
6. General-purpose voltage step-down in embedded, portable, and industrial electronics projects.

1. Model: I6A2-5V.
2. Converter type: non-isolated step-down (buck) DC-DC module.
3. Input voltage: 4.5V to 28V DC (input must be at least about 1V above the output).
4. Output voltage: fixed 5V DC.
5. Maximum output current: 3A (approximately 2.5A recommended for long-term continuous operation).
6. Conversion efficiency: up to 92%.
7. Output ripple: less than 50 mV.
8. Protection: short-circuit and overload protection.
9. Cooling: no additional heatsink required.
10. Operating temperature: -40°C to +85°C.
11. Dimensions: 16.5 × 22 mm.
12. Weight: approximately 3 g.