DC-DC Mini Step Down Buck Converter 1.8–5V to 3.3V – Support Documentation
The DC-DC Mini Step Down Buck Converter efficiently converts input voltages from 1.8V to 5V down to a stable 3.3V output. Designed for compactness and reliability, this module is perfect for powering 3.3V devices from USB or lithium battery sources in embedded and DIY electronics projects.
Key Features
- Input Voltage: 1.8V to 5V DC
- Output Voltage: Fixed 3.3V
- Maximum Output Current: 600mA (typical), up to 800mA peak
- Conversion Efficiency: Up to 96%
- Low quiescent current
- Built-in output short-circuit protection
- Over-temperature protection
- PCB Dimensions: ~11mm x 17mm
Pinout Description
| Pin Label | Description |
|---|---|
| VIN | Positive input voltage (1.8V to 5V) |
| GND | Ground connection |
| VOUT | Regulated 3.3V output |
Wiring Instructions
- Connect your input voltage source (e.g., USB power or 1-cell LiPo) to the VIN and GND pins.
- Connect your 3.3V logic circuit or device to the VOUT and GND pins.
- Ensure that the current drawn by your load does not exceed the converter’s rated current.
Applications
- Powering ESP8266, ESP32, NRF24L01, and other 3.3V modules
- Arduino and Raspberry Pi projects
- Battery-powered and wearable electronics
- Sensor networks and IoT applications
Usage Tips
- Use good soldering practices to ensure solid electrical connections.
- Place a 10µF to 100µF capacitor at the input and output for improved stability, especially under dynamic load changes.
- Avoid reverse polarity on the input to prevent damage.
Troubleshooting
- No output voltage: Check input power and verify that VIN is between 1.8V and 5V.
- Overheating: Ensure the module is not overloaded and that airflow is adequate.
- Instability: Add capacitors close to the input and output terminals to stabilise voltage under load.