AMS1117 3.3V Power Supply Module

Description

Description

The AMS1117 3.3V Power Supply Module is a compact and highly efficient linear voltage regulator module designed to provide a stable and clean 3.3V DC output from a higher voltage DC input. Built around the renowned AMS1117-3.3 low-dropout regulator (LDO), this module is an essential building block for countless electronics projects, microcontroller applications, and prototype development.

The AMS1117 series is a popular family of low-dropout linear regulators known for their simplicity, reliability, and excellent performance. This fixed 3.3V version accepts a wide input voltage range (typically 4.5V to 15V DC) and steps it down to a precise 3.3V output with a maximum current of up to 800mA to 1A (depending on cooling and input voltage conditions) . The module features a very low dropout voltage—the minimum difference required between the input and output for proper operation—of approximately 1.1V to 1.3V at full load . This allows you to power your 3.3V circuits from common 5V USB supplies, 9V batteries, or 12V wall adapters.

The onboard AMS1117-3.3 integrates essential protection features, including over-current protection (current limiting) and thermal shutdown, safeguarding your downstream circuitry and the regulator itself from damage during fault conditions . The regulator’s output voltage is trimmed for high accuracy, typically within ±1% to ±1.5% of the ideal 3.3V .

This module simplifies the use of the AMS1117 by breaking out the three essential pins (Input, Ground, Output) to easy-to-use screw terminal blocks or pre-soldered pin headers. Often, a power indicator LED is included to visually confirm that the output is active. Many variants also feature mounting holes, allowing for secure attachment within your project enclosure.

The board is typically designed with a very simple and straightforward layout, requiring only input and output filtering capacitors (often included on the module) for stable operation. This makes it an ideal “plug-and-play” solution for developers who need a reliable 3.3V rail without designing a custom power supply circuit.

Whether you need to power a 3.3V microcontroller, a sensor module, a wireless communication chip (like an ESP8266 or NRF24L01), or simply create a dedicated 3.3V test point on your workbench, the AMS1117 3.3V Power Supply Module provides a simple, effective, and reliable solution for all your voltage regulation needs.

Key Features

• Fixed 3.3V Output – Provides a stable, regulated 3.3V DC output perfect for modern microcontrollers and logic circuits .

• Wide Input Voltage Range – Accepts DC inputs from 4.5V to 15V, making it compatible with 5V USB, 9V batteries, and 12V adapters .

• High Output Current – Capable of delivering up to 800mA to 1A of continuous output current (depending on input/output voltage differential and thermal management) .

• Low Dropout Voltage – Requires only a 1.1V to 1.3V difference between input and output to maintain regulation, allowing it to run efficiently from 5V inputs .

• Integrated Protection – Features built-in over-current limiting and thermal shutdown protection for reliable, fail-safe operation .

• Excellent Regulation – Delivers precise output with a typical line regulation of 0.2% and load regulation of 0.4% .

• Low Quiescent Current – Consumes a very low operating current (5-10mA), making it suitable for power-sensitive applications .

• Easy to Use – Simple 3-pin interface (Input, Ground, Output) available on screw terminals or pin headers for quick, solderless wiring.

• Visual Indicator – Onboard power LED provides instant visual confirmation that the module is powered and the output is active.

• Compact Form Factor – Small footprint, typically around 25mm x 20mm, ideal for space-constrained projects and breadboard integration.

Technical Parameters