5V 3.3V Voltage Module

5V 3.3V - 2 Output Step Down Voltage Power Supply Module

Input 12V Output 5V - 3.3V AMS1117

     This module produces two fixed supply voltages, 5V and 3.3V, at the same time from a DC 6V-12V input. The board carries two AMS1117 linear regulators: one gives the 5V output, the other the 3.3V output, and both are fed in parallel from the input. Up to 800mA can be drawn from each regulated output; it is recommended for applications drawing 500mA. The third output group passes the input voltage straight through; if a 12V adapter is plugged in, these pins carry 12V.

     Input is through a standard 5.5mm x 2.1mm DC adapter socket; the outputs are brought out as 3 pairs of pin headers for each voltage (each pair has one voltage pin and one GND pin). This way 5V, 3.3V and the input voltage can be distributed to several circuits at once with jumper wires. The push on/off switch on the board cuts the outputs, and the power led shows that the supply is on. The board, about 32mm x 30mm in size, gives you the two main supply voltages from a single adapter.

Key features:

     Two voltages from one input: 5V and 3.3V are available at the same time from a 6V-12V DC input; parts working at 3.3V and 5V are powered from the same adapter.

     3 pin pairs for each voltage: There are 3 pairs of pin headers each for 5V, 3.3V and the input voltage; all GND pins are common. Several sensors or boards can be powered directly with jumper wires.

     Adapter socket and switch: The 5.5mm x 2.1mm DC socket accepts a standard adapter plug directly; the latching push switch turns the supply on and off without unplugging.

     Input pass-through: The third pin group gives the input voltage as it is; low current 12V loads such as a small fan or relay can be powered from the same board; no current limit is specified for this line.

     Linear regulator output: Because the AMS1117 is a linear regulator, it does not produce switching noise like switching converters; the output voltage stays stable with about ±0.05V accuracy.

Features:

• Product type: Dual output voltage module with AMS1117 linear regulators
• Input voltage: DC 6V-12V (the board is marked 7V-12V; 7V or more is recommended for a stable 5V output)
• Regulated output 1: 5V (AMS1117 5.0)
• Regulated output 2: 3.3V (AMS1117 3.3)
• Output 3: Input voltage, unregulated direct pass-through (12V at 12V input)
• Output current: Up to 800mA per regulated output (recommended for 500mA applications)
• Output accuracy: about ±0.05V
• Regulator layout: 5V and 3.3V regulators are fed in parallel from the input
• Output pins: 3 pairs 5V, 3 pairs 3.3V, 3 pairs input voltage pin headers (voltage + GND in each pair)
• GND: All GND pins are common
• Input socket: Standard 5.5mm x 2.1mm DC adapter socket
• Switch: Latching push on/off switch (push on, push off)
• Indicator: Power led
• Connection: Pin headers come fitted; solderless connection with jumper wires
• Suitable sources: 6V-12V DC adapter or a battery pack in this range
• Material: PCB board, blue
• Dimensions: about 32mm x 30mm x 13mm

Usage information:

• Plug a 6V-12V DC adapter into the 5.5mm x 2.1mm socket and press the switch to turn the supply on; the power led lights up.
• Power 5V circuits from the 5V pin group and 3.3V circuits from the 3.3V pin group; take the GND connection from one of the board's GND pins. For a stable 5V output, use an input of 7V or more.
• The regulators heat up as the load current rises; on this board each regulator can dissipate about 1.2W. To draw 500mA from the 5V output use a 7V-7.5V adapter; at 12V input do not draw more than about 170mA from the 5V output or about 140mA from the 3.3V output.

Applications:

•  5V and 3.3V supply for breadboard circuits
•  Powering sensors and modules at 3.3V / 5V
•  Powering microcontroller boards from an adapter
•  Auxiliary 5V and 3.3V supply for adapter powered devices
•  Getting 5V and 3.3V in battery pack powered setups
•  Logic supply in robot and vehicle chassis
•  Laboratory and school experiment setups
•  Bench test and prototype supply
•  Powering 3.3V Wi-Fi / Bluetooth modules
•  Supply distribution to LCD displays and relay boards

Precautions:

•  The AMS1117 is a linear regulator; the voltage difference between input and output turns into heat. For example, drawing 500mA from the 5V output at 12V input means about 3.5W of heat in the regulator; this small board can dissipate about 1.2W per regulator, beyond that the thermal protection of the regulator kicks in and the output drops or shuts off. Keep the input low for high current loads or use a switching (buck) converter.
•  The input voltage must not exceed 12V. Since the AMS1117 dropout is about 1.1V-1.3V at 800mA, at 6V input the 5V output may fall below 5V as the load rises; below 6V the 5V output drops.
•  The third pin group is the unregulated input voltage. Do not connect 3.3V or 5V parts to these pins; the part will be damaged.
•  Check the adapter output voltage and plug polarity before plugging in.
•  800mA is the upper limit for each regulated output; do not power high current loads such as motors or servos from this module.

Package contents:

•  1 Piece Multi Output Voltage Module 5V 3.3V
•  Note: DC adapter and jumper wires are not included in the package.