S09 DC-DC 5V 600mA Buck Boost Converter Step Up Down Power Module 2.5-15V

🔧 S09 DC-DC 5V Buck Boost Converter Module | AuscomTech

The S09 is a compact automatic DC-DC buck-boost converter designed to provide a regulated 5V output from a variable 2.5V–15V DC input. It automatically steps voltage up or down, making it suitable for battery-powered electronics, microcontroller circuits and embedded systems requiring a stable 5V supply.

With a maximum rated output current of 600mA, quiescent current below 200µA and a 1.2MHz switching frequency, this module provides compact voltage regulation for electronic projects where the input supply may vary above or below the required output voltage.

A dedicated enable (EN) input allows continuous operation or external electronic shutdown, making it useful for portable electronics, sensor systems, automation and power-managed applications.

⭐ Key Features

• Automatic Step-Up / Step-Down: Maintains a regulated output when the input voltage is above or below 5V.
• Wide Input Range: Accepts 2.5V–15V DC for flexible power source compatibility.
• 600mA Maximum Output: Supports compatible low-power electronic devices and circuits.
• Low Quiescent Current: Less than 200µA for battery-operated applications.
• Enable / Shutdown Control: Dedicated EN terminal for external power switching.
• High Switching Frequency: 1.2MHz operation in a miniature PCB format.
• Fixed Voltage Regulation: Nominal 5V output without adjustment.
• Compact Construction: 19 × 14 × 4.2mm module dimensions.
• Flexible Installation: Solder pads suitable for direct wiring or 2.54mm pin connections.
• Wide Temperature Range: Specified operation from -20°C to +85°C.

📊 Technical Specifications

• Model: S09
• Converter Type: Non-isolated DC-DC Buck-Boost
• Input Voltage: 2.5V–15V DC
• Output Voltage: 5V DC fixed
• Maximum Rated Output Current: 600mA
• Conversion Efficiency: 75% (supplier specified)
• Quiescent Current: Less than 200µA
• Output Ripple: Less than 50mV (specified)
• Output Accuracy: ±0.1V
• Switching Frequency: 1.2MHz / 1200kHz
• Control Input: EN (enable / shutdown)
• Enable High Level: 3V–15V recommended
• Shutdown State: EN low or floating
• Operating Temperature: -20°C to +85°C
• Relative Humidity: 20–90%
• Dimensions: 19 × 14 × 4.2mm
• PCB Layers: 2
• Installation: SMD or 2.54mm pin connection
• Cooling: Natural convection

🔌 Pin Definitions & Wiring

• VOUT-: Negative output terminal.
• VOUT+: Positive regulated 5V output terminal.
• EN: Module enable / shutdown control input.
• VIN+: Positive DC input terminal.
• VIN-: Negative DC input terminal.

Continuous Operation: Connect EN to VIN+ to enable the converter whenever input power is applied.

External Control: Drive EN high to activate the module. Pull EN low or leave floating to disable operation.

The supplied documentation lists an EN high level of 2V–15V in the pin definition and 3V–15V in the connection diagram. A control-high voltage of 3V–15V is the conservative operating choice.

🧩 Typical Applications

• Battery-powered 5V electronic circuits
• Arduino-compatible controller and sensor projects
• Microcontroller peripheral power regulation
• Portable wireless and communication devices
• DIY electronics and prototyping
• Embedded control and automation systems
• Robotics and model electronics
• Remote monitoring and data collection
• Industrial sensor and instrumentation circuits
• Compact regulated DC power supplies

⚠️ Important Notes

• Fixed Output: This listing is specifically for the 5V version. Output voltage is not adjustable.
• Maximum Current: 600mA is the rated maximum. Available output current depends on input voltage, power source capability and operating conditions.
• Low Input Voltage: When stepping up from a lower voltage, the input current will be higher than the output current. Ensure the power source can supply sufficient current.
• Input Limits: Use DC power within 2.5V–15V. Do not exceed the rated input voltage.
• EN Connection: The enable terminal must be driven high for operation. Connect EN to VIN+ for continuous operation.
• Microcontroller Compatibility: Suitable for compatible 5V circuits within the module’s current capability. Do not connect the 5V output directly to 3.3V-only power inputs or GPIO pins.
• Non-Isolated: Input and output do not provide galvanic isolation.
• Connection Polarity: Verify all terminals before applying power.
• Electrical Performance: Conversion efficiency, ripple and load capacity vary with operating conditions.
• Installation: Soldering may be required. Headers and connecting wires are not included.

📦 Package Includes

• 1 × S09 DC-DC Buck Boost Converter Power Module – Fixed 5V, 600mA

🔗 Recommended Accessories (Not Included)

• 2.54mm Male Pin Headers – For PCB and prototype mounting.
• Hook-Up Wire – For connecting input power and output loads.
• Prototype PCB / Perfboard – For custom electronic circuit assembly.
• Battery Holder or DC Power Supply – For providing compatible input power.