AMS1117 5V and 3.3V Dual Power Supply Module

AMS1117 5V and 3.3V Dual Power Supply Module provides a convenient, multi-rail voltage regulation solution for electronic prototyping and breadboard-based projects. This compact module utilizes high-performance Linear Dropout Regulators (LDOs) to convert a higher DC input into stable, dual-output rails. Consequently, it eliminates the need for complex custom circuitry when powering components that operate at different logic levels. Designers often employ this module to bridge the gap between 5V sensors and 3.3V microcontrollers. Furthermore, the integrated filter capacitors ensure a clean, low-noise output for sensitive analog and digital circuits. Therefore, you should include this versatile power module in your toolkit to simplify power management in any 5V or 3.3V embedded system.

Key Features:

• Dual Output Channels: The module simultaneously provides 3.3 V and 5.0 V regulated outputs, making it compatible with a wide variety of logic families.
• High Efficiency LDOs: Utilizes the AMS1117 series regulators which provide excellent line and load regulation with a low dropout voltage.
• Integrated Filtering: Includes on-board electrolytic and ceramic capacitors; however, these are specifically tuned to suppress ripple and provide stable power under varying loads.
• Power Indicator LED: Features an on-board LED that illuminates when the input power is active, offering immediate visual confirmation of system status.
• Easy Breadboard Integration: Designed with standard 2.54 mm pitch headers, the module plugs directly into breadboards or connects via standard jumper wires.

Technical Specifications:

• Input Voltage Range: 6.0 V to 12.0 V DC (Maximum recommended input)
• Output Voltage 1: 3.3 V DC (±1% accuracy)
• Output Voltage 2: 5.0 V DC (±1% accuracy)
• Maximum Output Current: 800 mA per channel (Total current depends on thermal dissipation)
• Dropout Voltage: ≈ 1.1 V at full load
• Operating Temperature: −40°C to +125°C (Internal regulator limit)

Mechanical Specifications:

• Regulator Package: SOT-223 (AMS1117 Surface Mount ICs)
• PCB Material: FR-4 High-quality glass fiber board
• Header Pins: Male 2.54 mm (0.1 in) pitch, gold-flashed or tinned copper.
• Mounting: Dual-row header pins for vertical or horizontal breadboard placement.

Dimensions:

• Module Length: ≈ 35 mm
• Module Width: ≈ 15 mm
• Total Height: ≈ 10.0 mm (including pins)
• Weight: ≈ 3.0 g (Extremely lightweight for compact enclosures)

Pinout and Wiring:

• Input Pins (IN+ / IN-): Connect the positive DC source (6V-12V) to IN+ and the ground to IN-.
• 5V Output Pins: Use these pins to power 5V logic devices; nevertheless, ensure the load does not exceed 800mA.
• 3.3V Output Pins: Provides the regulated 3.3V rail for ESP8266, STM32, and other low-voltage microcontrollers.
• GND Pins: Common ground pins shared between the input and all output rails for easy circuit referencing.

Datasheet Reference:

• Download AMS1117 Voltage Regulator Datasheet

Commonly Used in:

• Arduino Prototyping: Powering sensors, displays, and communication modules that require mixed voltage rails.
• ESP8266/ESP32 Projects: Providing the specific 3.3V high-current peaks required during Wi-Fi transmission.
• DIY Robotics: Driving logic circuits for motor controllers and ultrasonic distance sensors.

Applications:

• Voltage Level Shifting Power: Serving as a dedicated power source for level shifters in I2C or SPI communication.
• Battery Powered Devices: Regulating 7.4V or 9V batteries down to safe operating levels for sensitive electronics.
• Education and Labs: Providing a reliable and safe power source for students learning basic circuit design.

Equivalent Models:

• LM1117-ADJ: An adjustable version of the same regulator family, though it requires external resistors to set the voltage.
• LD1117V33: A through-hole alternative from STMicroelectronics that provides similar 3.3V regulation.
• MB102 Breadboard Power Module: A larger module that provides similar dual rails but mounts specifically to breadboard rails.

Package Includes:

• 1 x AMS1117 5V and 3.3V Dual Power Supply Module