DC-DC 12V to 3.3V 5V Multi-Output Power Supply Module

DC-DC 12V to 3.3V 5V Multi-Output Power Supply Module is a compact triple-rail linear step-down power distribution board that converts a single 6V to 12V DC barrel-jack input into three simultaneous DC output rails: fixed 3.3V DC, fixed 5.0V DC, and direct pass-through 12V (VIN) DC. Equipped with dual onboard AMS1117 linear regulators (AMS1117-5.0 and AMS1117-3.3), a latching push-button power switch, a red power indicator LED, and multiple male 2.54mm pin headers for each voltage rail, it serves as a central power distribution hub for multi-voltage microcontroller and sensor projects.

Key Features:

• Simultaneous Triple Voltage Outputs (3.3V, 5V, 12V): Supplies regulated 3.3V and 5.0V rails alongside direct input voltage (e.g. 12V DC) pass-through from a single wall adapter.
• Multi-Pin 2.54mm Distribution Headers: Double-row male Berg pin headers for GND, 3.3V, 5V, and 12V allow multiple sensors, modules, and microcontrollers to plug in using standard female DuPont jumper wires without breadboard clutter.
• Standard 5.5mm × 2.1mm DC Barrel Input: Connects directly to any standard 6V, 9V, or 12V DC wall adapter.
• Onboard Tactile Power Switch & Status LED: Self-locking push button switches all outputs ON/OFF simultaneously with visual red LED confirmation.
• Low-Noise AMS1117 LDO Regulation: Dual AMS1117 linear regulators provide clean, switching-ripple-free power up to 800mA per regulated rail.

Technical Specifications:

• Regulator ICs: AMS1117-5.0 + AMS1117-3.3 (SOT-223)
• Input Voltage Range: 6.0V to 12.0V DC (via 5.5×2.1mm Center-Positive DC Jack or VIN Header)
• Output Channel 1: 3.3V DC ± 2% (Up to 800 mA Max)
• Output Channel 2: 5.0V DC ± 2% (Up to 800 mA Max)
• Output Channel 3: Direct Pass-Through of Input Voltage (e.g. 12V DC)
• Total Combined Regulated Current: ≤ 800 mA Recommended (Thermal dissipation $P_D = (V_{IN} – V_{OUT}) times I_{LOAD}$)

Mechanical Specifications:

• PCB Material: FR-4 Double-Sided Blue Fiberglass Board
• Input Connector: 5.5mm × 2.1mm DC Barrel Jack
• Output Connectors: 2.54mm Pitch Male Pin Header Banks (3.3V, 5V, 12V, GND)
• Mounting: 4 × Corner Mounting Holes

Dimensions:

• Length: 59.5 mm
• Width: 26.5 mm
• Height: 14.0 mm
• Weight: ~13 g

Pinout and Wiring:

• DC-005 Barrel Jack: Connect 6V–12V DC center-positive power adapter.
• 3.3V Header Pins: Regulated +3.3V DC output for ESP8266, nRF24L01+, and 3.3V I2C sensors.
• 5.0V Header Pins: Regulated +5.0V DC output for Arduino, 5V relays, and ultrasonic sensors.
• 12V (VIN) Header Pins: Direct pass-through of DC jack input voltage for 12V fans, LED strips, or motor drivers.
• GND Header Pins: Common 0V ground shared across all rails.

Datasheet Reference:

• Primary IC Datasheet: AMS1117 800mA Low-Dropout Linear Voltage Regulator Datasheet (PDF)

Commonly Used in:

• Multi-Voltage Arduino, ESP32, and STM32 Benchtop Prototypes
• Robotics Chassis Requiring 12V Motors + 5V Servos/Sensors + 3.3V Wireless
• Sensor Hub Distribution Boards
• Academic Electronics & IoT Project Enclosures

Applications:

• Eliminates daisy-chained jumper wires when powering a 5V Arduino, a 3.3V ESP8266/LoRa radio, and a 12V cooling fan from a single 12V adapter.
• Provides a convenient master ON/OFF switch and organized power/ground bus pins inside project enclosures.
• Supplies low-noise linear power for mixed 3.3V and 5V analog/digital sensor arrays.

Equivalent Models:

• DC-DC 12V to 3.3V 5V 12V Multi-Channel Power Module: Compact variant with identical 3.3V/5V/12V multi-rail header distribution.
• MB102 Dual Channel 3.3V 5V Breadboard Power Supply Module: Plug-in breadboard power supply rail adapter.

Package Includes:

• 1 × DC-DC 12V to 3.3V 5V Multi-Output Power Supply Module