MT3608 DC-DC 2A Adjustable Step-Up Boost Converter Module

MT3608 DC-DC 2A Adjustable Step-Up Boost Converter Module is a compact, high-efficiency 1.2MHz switching step-up voltage regulator board based on the Aerosemi MT3608 IC. Capable of boosting a low 2V to 24V DC input into a continuously adjustable 5V to 28V DC output at up to 2A peak current with 93% conversion efficiency, it is a staple DC-DC booster for stepping up 3.7V Li-Ion batteries or 5V rails to 5V, 9V, 12V, or 24V in Arduino, ESP32, and portable electronics projects.

Key Features:

• Wide 2V–24V Input to 5V–28V Output: Steps up single-cell 3.7V lithium batteries, dual AA cells, or 5V USB supplies up to 9V, 12V, 15V, or 24V DC.
• High 1.2MHz Switching Efficiency (Up to 93%): High switching frequency utilizes a compact SMD shielded power inductor and ceramic capacitors for low output ripple.
• 28-Turn Precision Trim Potentiometer: Multi-turn blue cermet potentiometer provides fine, drift-free calibration of the boosted output voltage.
• Up to 2A Output Current Capability: Internal 4A current-limited power MOSFET supports up to 2A output current (1A–1.5A continuous recommended without extra cooling).
• Built-In Protection Suite: Integrates under-voltage lockout (UVLO), cycle-by-cycle current limiting, and thermal overload shutdown.

Technical Specifications:

• Boost Controller IC: Aerosemi MT3608 (SOT23-6)
• Input Voltage Range: 2.0V to 24.0V DC
• Output Voltage Range: 5.0V to 28.0V DC (Continuously Adjustable; VOUT must exceed VIN by ≥1V)
• Maximum Output Current: 2.0A Peak (≤ 1.2A Continuous Recommended)
• Conversion Efficiency: Up to 93%
• Switching Frequency: 1.2 MHz
• Operating Temperature Range: -40°C to +85°C

Mechanical Specifications:

• PCB Material: FR-4 Double-Sided Blue Solder Mask Fiberglass Board
• Connection Terminals: 4 × Corner Through-Hole Solder Pads (VIN+, VIN-, VOUT+, VOUT-)
• Adjustment Control: 3296W Multi-Turn Trimmer Potentiometer

Dimensions:

• Length: 36 mm
• Width: 17 mm
• Height: 14 mm
• Weight: ~5 g

Pinout and Wiring:

• VIN+ : Positive DC input voltage (2V–24V).
• VIN- : Input negative ground (shared common ground with VOUT-).
• VOUT+ : Regulated boosted DC positive output (5V–28V).
• VOUT- : Output negative ground.
• First-Use Calibration Note: On a brand-new module, turn the potentiometer counterclockwise (CCW) 10 to 15 full turns while monitoring VOUT with a multimeter until the voltage begins to rise.

Datasheet Reference:

• Primary IC Datasheet: Aerosemi MT3608 2A 1.2MHz Current-Mode Step-Up Converter Datasheet (PDF)

Commonly Used in:

• 3.7V Li-Ion / 18650 to 5V, 9V, or 12V Battery Boost Circuits
• Portable Power Supplies for Arduino, ESP32, and OLED Displays
• 12V Relay, Solenoid, and Cooling Fan Drivers from 5V Rails
• handheld Multimeter 9V Lithium Battery Conversions

Applications:

• Boosts a single 3.7V 18650 or LiPo cell to a regulated 5V, 9V, or 12V rail for sensors, op-amps, and wireless transmitters.
• Steps up a 5V microcontroller rail to 12V DC to actuate 12V relays, buzzers, or PC cooling fans.
• Provides a compact adjustable bias voltage up to 28V DC for LCD contrast circuits and varactor tuning stages.

Equivalent Models:

• MT3608 DC-DC 2A Step-Up Power Module with Micro-USB: Identical MT3608 circuit with an added Micro-USB 5V input socket.
• XL6009 DC-DC Adjustable Step-Up Boost Converter Module: Larger 4A boost regulator module for higher-wattage loads.

Package Includes:

• 1 × MT3608 DC-DC 2A Adjustable Step-Up Boost Converter Module