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AMS1117-3.3 DC-DC Step-Down Power Supply Module (Fixed 3.3V)

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As modern electronics rapidly shift away from the older 5-Volt standard, having a reliable 3.3-Volt power source is absolutely critical. Chips like the ESP32, ESP8266 Wi-Fi transceivers, and various modern sensors will be instantly destroyed if powered by 5 Volts. This AMS1117-3.3 breakout module provides the perfect plug-and-play solution. It features a factory-calibrated AMS1117 Low Dropout (LDO) linear regulator, surface-mounted alongside all the necessary input and output smoothing capacitors, ensuring a highly stable, noise-free 3.3-Volt output right out of the box.

Designed for rapid prototyping and easy integration, the module takes a slightly higher unregulated input voltage ideally from a 5-Volt USB line or a 9-Volt battery and efficiently steps it down to a continuous 3.3 Volts. Featuring a standard three-pin header configuration (Input, Ground, and Output) and an onboard power indicator LED, it plugs seamlessly into solderless breadboards or can be permanently soldered into custom, space-constrained enclosures.

Key Features & Functional Advantages

  • Plug-and-Play Convenience: Comes completely assembled with the surface-mount regulator, stabilizing capacitors, and a status LED, saving you from having to design a custom regulation circuit.

  • Low Dropout Operation: As an LDO regulator, it only requires an input voltage roughly 1.2 Volts higher than the output to maintain regulation, making it highly efficient when stepping down a 5-Volt line.

  • Fixed 3.3-Volt Output: Factory preset to deliver exactly 3.3 Volts, eliminating the need for external voltage adjustment components.

  • Breadboard Compatible: The pre-soldered 2.54-millimeter pitch header pins fit perfectly into standard breadboards and standard female jumper wires.

  • Integrated Safety Features: Equipped with internal thermal shutdown and current-limiting hardware to protect the module from catastrophic failure during accidental short circuits.

Perfect For

  • Wireless Transceivers: The absolute best way to provide the heavy, stable 3.3-Volt current bursts required by ESP8266 and NRF24L01 wireless modules.

  • Modern Microcontrollers: Safely powering 3.3-Volt development boards, displays, and sensors directly from an older 5-Volt Arduino or USB power supply.

  • Rapid Prototyping: Quickly establishing a localized 3.3-Volt logic rail on a busy breadboard without dragging in bulky external power adapters.

  • Compact Enclosures: Ideal for tight, 3D-printed project boxes where traditional through-hole regulators will simply not fit.

Technical Specifications

  • Device Type: Low Dropout (LDO) Linear Voltage Regulator Module

  • Onboard IC: AMS1117-3.3

  • Output Voltage: Fixed 3.3 Volts DC

  • Input Voltage Range: 4.5 Volts to 12.0 Volts DC

  • Maximum Output Current: 800 milliamps (thermal limits apply)

  • Status Indicator: Onboard Red LED

  • Pin Configuration: VIN (Input), GND (Shared Ground), VOUT (Output)

  • Dimensions: Approximately 25 millimeters x 11 millimeters

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