Introduction

The MT3608 is a popular step-up (boost) DC-DC converter IC that can efficiently convert lower voltages (like 5V from USB) to 12V. Here’s how to create a 12V boost converter using the MT3608 that plugs into a USB port.

For Full Project:

https://electronicsworkshops.com/2025/01/27/12v-boost-converter-usb-plug-using-mt3608/

12V Boost Converter USB Plug Using MT3608

MT3608

The MT3608 is a constant frequency, current mode step-up converter typically used in small, low-power applications. It’s designed to boost lower voltages to higher voltages efficiently.

Key Features:

Integrated 80mΩ Power MOSFET
Input Voltage: 2V to 24V
Adjustable Output Voltage: up to 28V
Fixed Switching Frequency: 1.2MHz, which allows for smaller and lower cost capacitors and inductors.
Internal 4A Switch Current Limit
Automatic Pulse Frequency Modulation (PFM) Mode at Light Loads for higher efficiency
Internal soft-start to limit inrush current
Thermal overload protection
Available in a small 6-Pin SOT-23 package
Efficiency up to 97>#/strong###

Applications

Battery-powered equipment (portable speakers, digital cameras)
Set-top boxes
LCD bias supply
DSL and cable modems and routers
Networking cards powered from PCI or PCI express slots
LED drivers
Power modules
Medical Equipment

Key Specifications

Input Voltage: 2V – 24V
Adjustable Output Voltage: up to 28V
Switching Frequency: 1.2 MHz
Maximum Output Current: 2A (though sustained use at 1A is recommended by some sources)
Operating Temperature: -40°C to +85°

Components Required

ComponentSpecs
MT3608 Boost Converter ModuleInput: 2V–24V, Output: up to 28V
USB Plug (Male or Female)5V Output, standard USB-A
Output Terminal (optional)For clean 12V connection
Wire and Heat ShrinkFor secure and safe connections
MultimeterFor voltage calibration

Circuit Description

USB Input (5V) → MT3608 Boost Converter → Adjust to 12V Output

The USB plug provides 5V input to the MT3608.

The MT3608 steps this up to 12V.

The output can power small 12V devices like LED strips, relays, fans, routers (low current), or Arduino shields

Circuit Diagram MT3608


  1. USB Connection:
    • Connect the USB plug’s +5V (usually red wire) to the input of your circuit
    • Connect the USB ground (usually black wire) to your circuit ground
  2. Input Filtering:
    • Add a 10μF capacitor between input +5V and ground
  3. MT3608 Connections:
    • Vin pin to USB +5V
    • GND pin to USB ground
    • SW pin to inductor
    • FB pin to voltage divider
  4. Output Section:
    • Connect the inductor to the anode of the Schottky diode
    • Cathode of diode is your 12V output
    • Add output capacitor (22μF) between 12V and ground
  5. Feedback Voltage Divider:
    • Calculate resistors for 12V output (FB voltage is typically 0.6V)
    • R1 = (Vout/Vfb – 1) × R2
    • R1=62k R2= 3.3k

For Full Project:

https://electronicsworkshops.com/2025/01/27/12v-boost-converter-usb-plug-using-mt3608/

PCB Files

3D files

Manufacturing Files

Gerber Files

Gerber_allpcb_MT3608_12V_BoostConverterPlug_v1.0_2025-05-01Download

Bill Of Materials

BOM_allpcb_2025-05-01-1Download

Pick And Place File

PickAndPlace_MT3608_12V_BoostConverterPlug_v1.0_2025-05-01Download

Order Directly from PCB WAY

I have already uploaded all these required manufacturing files in PCBWAY website. You can easily go to the below link and place you order, and get your Own  Home Automation PCB manufactured from one of the best pcb manufacturer PCBWAY

ORDER NOW…..

Safety Considerations

  • Double-check polarity of all components
  • Avoid short circuits on the output
  • Don’t exceed USB current limits (typically 500mA for standard USB)
  • The output voltage can be adjusted by changing the feedback resistors

Conclusion

This simple circuit will allow you to power 12V devices from a standard USB port, useful for small electronics projects or low-power 12V devices.

For Full Project:

https://electronicsworkshops.com/2025/01/27/12v-boost-converter-usb-plug-using-mt3608/