MINI USB 5V/3.3V AMS1117 Power Supply Module (Dual-Output Step-Down Voltage Regulator)
Deliver clean, stabilized power to your microcontrollers and prototype layouts with the compact MINI USB 5V/3.3V AMS1117 Power Supply Module. Engineered as a high-efficiency multi-purpose power distribution node, this board converts variable USB input voltage into rock-solid, regulated 5V and 3.3V DC outputs simultaneously.
Driven by the industry-standard AMS1117 low-dropout linear voltage regulator, this module completely filters out voltage ripples and electrical noise. Featuring a built-in Mini USB interface alongside standard grid output pins, it easily energizes sensitive low-power components like ESP32 modules, Bluetooth chips, and wireless transceivers that demand a clean 3.3V supply to operate without data corruption. It serves as the definitive choice for compact breadboard power grids, sensor array arrays, portable automation enclosures, and student electronics workstations.
Key Features
Simultaneous Dual-Voltage Rail Output: Generates both a stable 5V DC line and a high-precision 3.3V DC line at the same time, allowing you to power mixed-voltage circuits without needing multiple power supplies.
Elite Low-Dropout Regulation: Built around the high-stability AMS1117 linear regulator chip, guaranteeing tight voltage control and exceptional ripple rejection even during sudden load fluctuations.
Convenient Mini USB Interface: Equipped with a heavy-duty, surface-mount Mini USB port, letting you draw clean operational power directly from standard computer USB ports, phone chargers, or portable power banks.
Onboard Power Status Indicator: Features an integrated SMD power LED that lights up immediately to give you instant visual confirmation that the power input grid is successfully energized.
Flexible Pin-Header Expansion Grid: Outputs power through parallel columns of standardized 2.54mm pitch pin channels, making it incredibly simple to run jumper wires straight to your breadboard or main controller.
Compact, Space-Saving Footprint: Designed with an ultra-small circuit architecture that slides effortlessly into tiny project housings and crowded prototyping spaces.
Technical Specifications
Feature | Specification |
Core Regulator Chipset | AMS1117-3.3V Linear Voltage Regulator |
Input Connection Interface | Mini USB Port or Dedicated Direct DC Hardware Pins |
Input Voltage Range | 4.5V to 7.0V DC (Standard 5V USB highly recommended) |
Output Regulated Channels | 3.3V DC and 5.0V DC (Simultaneously active) |
Maximum Output Current | Up to 800 mA (Dependent on input power stability and thermal dissipation) |
Voltage Regulation Precision | Within a tight 1% tolerance envelope |
Pitch Spacing Layout | Standard 2.54 mm (0.1 inch) breadboard grid alignment |
Board Dimensions | 25 mm x 25 mm x 10 mm |
Hardware Interface & Pin Mapping
The module features a clearly labeled layout that simplifies power routing for development platforms like Arduino, ESP8266, ESP32, STM32, and Raspberry Pi:
Mini USB Port: Main primary power input port. Connect to any standard 5V USB power block.
IN+ / IN- (Hardware Pins): Auxiliary direct DC input path. Allows you to hook up an external battery pack or bench supply (4.5V to 7V) instead of using a USB cable.
5V Channels: Regulated +5V DC output pins drawn from the USB input line. Perfect for powering standard relays, displays, and main microcontroller boards.
3.3V Channels: Regulated +3.3V DC output pins driven by the AMS1117 chip. Engineered specifically for low-voltage wireless sensors and microchips.
GND Channels: Common system ground reference rails that link your entire circuit layout together.
Common Applications
ESP8266 & ESP32 Prototyping Rails: Provide the steady, noise-free 3.3V power required by high-current Wi-Fi transmission bursts, preventing unexpected module resets.
Mixed-Voltage Breadboard Projects: Power standard 5V logic microcontrollers along with 3.3V sensor modules simultaneously on a single shared breadboard layout.
Portable Instrumentation Units: Serve as the central power regulator inside small handheld diagnostic instruments, data loggers, and wearable electronic assemblies.
USB-Powered Desktop Devices: Build custom USB-powered gadgets, small fans, LED accent setups, and automated desk accessories that run right off a computer port.
🛠️ Engineering Thermal Optimization Note: The AMS1117 is a high-efficiency linear regulator that converts excess voltage into heat. When drawing high currents near its 800 mA maximum limit, the module will naturally warm up. To maintain rock-solid stability, ensure the module is positioned in an area with adequate passive airflow and avoid feeding it input voltages higher than 7V DC to prevent triggering the internal thermal protection shutdown loop.
Package Includes:
1 x MINI USB 5V/3.3V AMS1117 Power Supply Module