MT3608 2A DC To DC Step Up Power Boost Converter Module

The MT3608 module is a step-up power boost converter, which can regulate the output voltage from 5V to 28V at 1.2Mhz and deliver an output current of a maximum of 2A.

The module can be automatically shifted to pulse frequency modulation mode at light loads, and its internal soft-start results in a small inrush current and extends battery life.

It consists of SMD components leading to a compact-sized power boost module with 93% efficiency intended for small and low-power applications.

MT3608 Module Specifications

The specifications of the MT3608 module are given below:
  • Input Voltage: DC 2-24V
  • Output Voltage: DC 5-28V
  • Maximum Output Current: 2A
  • Switching Frequency: 1.2MHz (Fixed)
  • Operating Temperature: -40°C to +90°C
  • Output Ripple: <100mV
  • Efficiency: 93%
  • Dimensions: 37 x 17 x 7 mm
  • Weight: 4gm

MT3608 Module Circuit Diagram

The schematic of the MT3608 2A DC to DC step-up power boost converter circuit is shown below.

Components are used in the circuit - U1: MT3608 IC, RP1: 100KΩ Multiturn Potentiometer, R1: 2.2KΩ Resistor, C1 & C2: 22µF Ceramic Capacitor, and L1: 22µH Inductor.

Working Principle of MT3608 Module

The working principle of the MT3608 module circuit is simple, where the main component is the 6-pin MT3608 integrated circuit. According to the functional block diagram of the MT3608 IC (U1) has an Error amplifier, PWM comparator, Control logic, Integrated 80mΩ Power MOSFET, Current sense amplifier, and OSC.

When the boost converter module gets the input power, the capacitor C1 is charged. Initially, the IC (U1) starts to switching and also the current is passed through the inductor(L1) directly from the input source, which induces some magnetic field. The IC (U1) uses a fixed 1.2Mhz frequency peak current mode booster architecture to regulate the voltage at the feedback pin-3 and change the current level passing through L1. Therefore, at the IC turns ON stage, the magnetic field collapses, and it generates a high voltage spike.

Again, when IC turns OFF stage, the voltage spike passes through the Schottky diode (D1), where it blocks a reverse current to the circuit and gets stored the power in the capacitor (C2). Hence, it increases the voltage of the capacitor (C2), and the output obtains a higher voltage level across the capacitor up to 28 volts.

Application of MT3608 Module

  • Battery-Powered Equipment
  • Networking cards powered from PCI/PCIexpress slots
  • Set-Top Boxed
  • Routers
  • LCD Bais Supply


  1. That circuit doesn't look right to me. The feedback input (3) has an absolute maximum rating of 6V. Winding the pot to the end will put the output voltage straight to the feedback. This circuit is designed for USB (5V) output only - any setting above ~6V will destroy the device.

  2. I believe that you are right! I have destroy 2 working with 12 volts from battery.


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