DC-DC Converter Step-down Board Voltage Regulator 4.5v-18v To 3v 3.3v 3.7v 4.2v5

A fixed-output step-down voltage regulator module available in multiple preset output voltages (3 V, 3.3 V, 3.7 V, 4.2 V, 5 V, 6 V) — no potentiometer adjustment required. Accepting 4.5–18 V input, delivering up to 4 A continuous output at 500 kHz switching frequency, this module is designed for applications where a specific stable voltage rail is always required and drift-free operation is critical.

🔹 Key Applications

• 3.3 V regulated power for ESP8266/ESP32 Wi-Fi modules
• 5 V regulated supply for Arduino Uno or Nano boards
• 3.7 V regulated output for direct lithium cell replacement
• 4.2 V supply for battery-level simulation in charging circuits
• Fixed-voltage power rails in production embedded hardware

🔹 Why Choose This Module?

• Fixed output voltage — eliminates calibration drift over time
• 6 voltage options — choose exactly what your circuit needs
• 4 A continuous output (5 A peak) — headroom for high-demand loads
• 500 kHz switching — low ripple, clean output
• No adjustment required — plug-and-play stable voltage

🔹 Technical Specifications

• Input Voltage: 4.5 V – 18 V DC
• Output Voltages Available: 3 V, 3.3 V, 3.7 V, 4.2 V, 5 V, 6 V (specify on order)
• Continuous Output Current: 4 A
• Peak Output Current: 5 A
• Switching Frequency: 500 kHz

🔹 What's Included

1 × Fixed-Output Step-Down Voltage Regulator Module (specify voltage)

🔹 Pro Tip

💡 Select the 3.3 V variant for ESP32 and ESP8266 projects powered from a 5 V USB power bank or 12 V supply — it delivers more stable voltage than the ESP32's onboard regulator at higher current draws. Specify your required output voltage at time of order.

⚠️ Note: Always ensure proper heat dissipation and correct voltage configuration before powering connected devices.