AMS1117 3.3V Step-Down Voltage Regulator Module
The a compact, reliable power solution for DIY electronics and microcontroller projects. It accepts a 4.5V to 7V DC input and outputs a stable 3.3V at up to 800mA, making it perfect for powering 3.3V logic devices from higher voltage sources like 5V USB supplies or 7.4V LiPo batteries.
A red power indicator LED confirms the module is receiving input voltage, and the small PCB footprint (8.6mm x 12.33mm) fits easily into tight project enclosures.
Key Features
• Stable 3.3V output from 4.5V–7V input
• Maximum 800mA load current
• Compact PCB size: 8.6mm x 12.33mm
• Red power indicator LED
• Linear regulation with low dropout (input must be >1V above output)
• Ideal for Arduino, ESP32, ESP8266, Raspberry Pi Pico, and other 3.3V microcontrollers
Compatibility
• Arduino Uno/Nano/Mega (3.3V logic )
• ESP32 and ESP8266 Wi-Fi modules
• Raspberry Pi Pico and RP2040-based boards
• 3.3V sensors, displays, and peripherals
• DIY electronics projects requiring 3.3V rail from 5V or 7.4V supplies
Important Compatibility Note
Input voltage must be at least 1V higher than the 3.3V output (minimum 4.3V, 4.5V recommended). Do not exceed 7V input. Load current must not exceed 800mA to avoid thermal overload.
Applications
Microcontroller power supplies, portable electronics, battery-powered projects, breadboard prototyping, IoT devices, STEM education kits
Technical Specifications
• Input Voltage: 4.5V–7V DC
• Output Voltage: 3.3V ±5%
• Maximum Output Current: 800mA
• PCB Dimensions: 8.6mm x 12.33mm
• Regulation Type: Linear (low dropout)
• Indicator: Red power LED
• Applications: Microcontroller power, portable electronics, prototyping
Limitations
• Not suitable for high-current loads over 800mA
• Linear regulator: excess voltage is dissipated as heat (may require heatsink for continuous high loads)
• Not rated for medical, life-saving, or hazardous environment use
• Input voltage must not exceed 7V
Package includes: 1x.
The image is for illustrative purposes only. Due to variations in camera settings, lighting, manufacturing processes, monitors, and supply, colours may differ. Product appearance and specifications are subject to change without notice.
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Frequently Asked Questions (FAQs)
Q: Can I use this with a 9V battery?
A: No, the maximum input voltage is 7V. A 9V battery will damage the regulator.
Q: Will this power a Raspberry Pi 4?
A: No, the Raspberry Pi 4 requires up to 3A at 5V. This module is designed for low-current 3.3V devices.
Q: Does this include a heatsink?
A: No, the module ships as pictured with no additional heatsink. For continuous loads above 500mA, consider adding a small heatsink.
Also Known As AMS1117-3.3, AMS1117 3.3V regulator, DC-DC step-down module, 3.3V power module, linear voltage regulator breakout.
Warranty & : 14-day 'change of mind' return in unused condition for a refund less shipping fees.
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