General

• Product Type: DC-DC Step-Down (Buck) Converter Module
• Function: Converts higher DC voltage (e.g. 12V) to stable 3.3V output
• Conversion Type: Switching Regulator (High Efficiency)

Input

• Input Voltage Range: 5V – 23V DC (typical)
• Recommended Input: 7V – 18V DC
• Input Interface:
  • Screw terminal (VIN / GND)
  • DC barrel jack (5.5 × 2.1mm)

Output

• Output Voltage: 3.3V (fixed)
• Max Output Current: up to 3A (peak)
• Recommended Current: 1.5A – 2A for stable operation
• Output Interface: Screw terminal (VOUT / GND)

Performance

• Efficiency: Up to 90–95%
• Switching Frequency: ~150 kHz (typical)
• Ripple: Low ripple output (suitable for microcontrollers)
• Thermal Protection: Yes
• Overcurrent Protection: Yes

Features

• High-efficiency step-down conversion (better than linear regulators)
• Stable 3.3V output for sensitive electronics
• Onboard power switch (easy control)
• Multiple connection options (terminal + DC jack)
• Compact and easy to integrate

Interface & Pins

• Input: VIN+, VIN-
• Output: VOUT+, VOUT-
• Additional Headers: Breakout pins for easy wiring

Physical

• Form Factor: Compact PCB module
• Mounting: 4 mounting holes
• Cooling: Passive (improves with airflow)

Applications

• ESP32 / ESP8266 power supply
• Raspberry Pi (3.3V peripherals)
• Arduino projects
• Sensors & communication modules
• DIY electronics and robotics

Important Notes

• Ensure correct polarity before powering
• For high current (>2A), provide cooling
• Input voltage must be higher than 3.3V