Product Description The AMS1117-3.3V Power Supply Module is a compact and reliable Low Dropout (LDO) voltage regulator designed to convert standard 5V logic power into a stable 3.3V output. Many modern microcontrollers and sensors—such as the ESP8266, ESP32, and various GPS modules—operate strictly on 3.3V and can be damaged by 5V. This module provides an easy "plug-and-play" solution to bridge that gap. Featuring integrated filter capacitors and a power indicator LED, it ensures a clean, noise-free voltage supply for sensitive electronic circuits.
Key Highlights
Stable 3.3V Output: Provides a fixed, regulated voltage even if the input power fluctuates slightly, protecting your delicate 3.3V components.
Low Dropout Performance: The AMS1117 IC is designed to operate efficiently with a small voltage difference between input and output (typically 1.1V to 1.3V).
Integrated Filtering: Comes with onboard electrolytic and tantalum capacitors to smooth out ripples in the power signal, which is critical for wireless modules.
Compact & Breadboard Friendly: Its tiny footprint and standard 2.54mm pitch headers allow it to be plugged directly into a breadboard or soldered into a custom PCB.
Visual Status: Includes an onboard Red LED that lights up when the module is receiving power, making troubleshooting much faster.
Technical Specifications
Output Accuracy: 1.5%
Line Regulation: 0.2% (Max)
Load Regulation: 0.4% (Max)
Operating Temperature: -40°C to +125°C
Dimensions: 25.5mm x 11.5mm
Installation Tip from Robogears While the AMS1117 is rated for up to 800mA, it is a linear regulator, meaning it dissipates excess voltage as heat. If you are drawing more than 400mA continuously (common with ESP8266 WiFi modules during transmission), the chip can get quite hot. Ensure the module has adequate airflow. For the best stability, keep the input voltage around 5V; providing a much higher voltage (like 9V or 12V) will cause the regulator to overheat and potentially shut down due to its internal thermal protection.
Note: This product is a step-down regulator only. It cannot increase (boost) voltage. Product images are for illustration purposes only.
