This 1pcs DC-DC Step Down Power Supply Buck Module is based on the AMS1117 voltage regulator chip, specifically designed to convert 5V DC input voltage to a stable 3.3V DC output, with a maximum output current of 800mA. It features automatic adjustable functionality, start limit voltage protection, and can also work as a boost board when needed, making it a practical and versatile power supply solution for Arduino, MCU, and various low-voltage electronic projects.
At the core of the module is the AMS1117 linear voltage regulator chip, a highly reliable and widely used component in low-power power supply circuits. The chip ensures stable voltage conversion from 5V to 3.3V, with low ripple and noise, providing a clean and stable power supply for sensitive electronic components such as ESP32, ESP8266, STM32 microcontrollers, and Arduino boards that require 3.3V power.
With a maximum output current of 800mA, the module can supply sufficient power to drive multiple low-power components simultaneously, such as sensors, small displays, and communication modules, without voltage drop or instability. It supports a wide input voltage range (typically 4.75V-12V), with a dedicated 5V input design that is fully compatible with USB power supplies, Arduino 5V output, and other common 5V power sources.
A key feature of this module is its automatic adjustable functionality, which allows it to adapt to slight fluctuations in input voltage and automatically stabilize the 3.3V output, ensuring consistent power supply even when the input voltage changes slightly. Additionally, it is equipped with start limit voltage protection, which prevents damage to the module and connected devices caused by excessive input voltage or unstable power during startup.
The module also functions as an automatic adjustable boost board, enabling it to adjust the output voltage within a certain range when needed, making it more flexible for projects with varying voltage requirements. Its compact and lightweight design allows for easy integration into space-constrained projects, such as portable electronics, DIY kits, and embedded systems.
Designed with user-friendliness in mind, the module features clear input and output terminals (VIN+, VIN-, VOUT+, VOUT-), with clear labeling to simplify wiring. It has built-in over-current protection and short-circuit protection, further enhancing the safety and reliability of the power supply. The linear voltage regulation technology ensures low power consumption and minimal heat generation, allowing the module to work stably for long periods.
This AMS1117 step down module is widely used in Arduino projects, MCU power supply, IoT devices, portable electronics, and DIY electronic kits. It is easy to install and use, requiring no complex configuration, making it suitable for both beginners and professional developers. With its 5V to 3.3V conversion, 800mA output, automatic adjustment, and protection features, it is a cost-effective and reliable power supply solution for all kinds of low-voltage electronic projects.
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