The 97.5% Efficiency DC-DC Step-Down Module is a high-performance buck converter designed to deliver a stable 5V output from a 6V to 20V DC input with exceptional efficiency and very low output ripple. With a maximum output current of 3A, this module is an ideal solution for powering sensitive electronics, microcontrollers, sensors, and communication modules where clean, reliable power is essential.
At the heart of the module is a high-efficiency synchronous buck converter that achieves an outstanding 97.5% conversion efficiency — significantly higher than typical buck converters. This translates to minimal power loss, reduced heat generation, and extended battery life in portable applications. The very low ripple characteristic ensures clean, stable power delivery, making it suitable for noise-sensitive analog circuits, audio equipment, and precision measurement devices.
The module accepts a wide input voltage range of 6V to 20V DC, making it compatible with a broad range of power sources including:
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2S–4S lithium battery packs (7.4V–14.8V)
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12V car and marine systems
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12V and 20V power adapters
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USB PD power sources (when configured for 12V/20V)
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9V and 12V battery systems
The 5V fixed output is ideal for powering:
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Arduino and compatible microcontroller boards
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ESP32, ESP8266, and other WiFi modules
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Raspberry Pi and single-board computers
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Sensors, displays, and communication modules
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USB peripherals and charging circuits
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Audio and analog circuits requiring clean power
The 3A maximum output current provides ample power for demanding 5V loads. The module includes built-in protection circuits including overcurrent protection, thermal shutdown, and short-circuit protection, ensuring safe and reliable operation even under fault conditions.
The compact form factor with mounting holes allows easy integration into equipment enclosures, project boxes, and portable devices. The module features screw terminals or pin headers for secure input and output connections, with clearly labeled terminals for easy wiring.
The module is widely used in microcontroller projects, IoT devices, portable electronics, automotive electronics, industrial control, audio equipment, test and measurement instruments, and any application requiring a high-efficiency, low-ripple 5V supply from a higher input voltage.
Important Note: The module requires the input voltage to be higher than the output voltage (5V) by at least 1.5V for proper regulation. For example, a 6V input provides the minimum headroom, while 12V or 20V inputs provide optimal efficiency. Always verify the input voltage and current ratings match your application.
Whether you are powering an ESP32 from a 12V battery, building a portable USB charger, or adding a clean 5V rail to an analog circuit, the 97.5% Efficiency DC-DC Step-Down Module provides a reliable, ultra-efficient solution. It is suitable for individual makers, engineers, and businesses purchasing in bulk for product development or industrial applications.
Features
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97.5% conversion efficiency — Industry-leading efficiency minimizes power loss and heat
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Very low output ripple — Clean, stable power for noise-sensitive circuits
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Wide input voltage range — 6V to 20V DC
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3A maximum output current — Ample power for demanding 5V loads
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Fixed 5V output — No adjustment required, simplifying integration
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Synchronous buck converter — Low heat generation, no external heat sink required
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Built-in protection — Overcurrent, thermal shutdown, and short-circuit protection
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Compact form factor — With mounting holes for easy installation
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Wide application range — Microcontrollers, IoT, portable electronics, audio, automotive
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | Module Type | Step-down (buck) converter |
| 2 | Conversion Efficiency | Up to 97.5% |
| 3 | Input Voltage Range | 6V – 20V DC |
| 4 | Output Voltage | 5V DC (fixed) |
| 5 | Maximum Output Current | 3A |
| 6 | Output Ripple | Very low |
| 7 | Protection | Overcurrent, thermal shutdown, short-circuit |
| 8 | Module Dimensions | Compact PCB with mounting holes |
