10 Pack 3 Pins AMS1117-3.3 DC 4.75V-12V to 3.3V Voltage Regulator
4.1Editor score
Simple 3 pin design for easy wiring
0.8A output suitable for most MCUs
Overheat shutdown protection included
In this guide
Finding the right 5V to 3V voltage regulator is essential for powering sensitive electronics like microcontrollers and sensors without damaging them. Stable voltage conversion ensures your projects run reliably under varying load conditions.
We evaluated ten top-rated regulators based on efficiency, size, current capacity, and user feedback. Our analysis covers buck converters and linear regulators to help you choose the best fit for your specific application needs.
Each pick highlights key specs, pros, and ideal use cases so you can decide quickly. Remember that stock and availability may shift, so checking the latest details before purchasing is always recommended for your project timeline.
Top 3 Picks for Best 5V to 3V Voltage Regulator
5pcs 3.3V Buck Converter Module DC 4.5-24V to 3.3V Voltage Regulator
4.6Editor score
Wide 4.5V to 24V input range
1.8A max continuous output current
Ultra compact 17.5mm size design
3.3V Regulator 5pcs Mini Reducer DC 5-30V 5V 12V 24V Buck to 3.3V Buck Converter Board 1.8A Output Mini360 Small Size Power Module (3.3, Volts)
5.0Editor score
High 1.8A output current capacity
Low ripple under 30 millivolts
Switching frequency up to 1.5MHz
Top 10 Best 5V to 3V Voltage Regulator in 2026 Compared
This table provides a side-by-side comparison of all ten selected 5V to 3V voltage regulators. Review key specs like input range, output current, and physical size to find the best match for your design constraints.
ProductsSpecificationsEditor scorePrice
Editor's Choice
5pcs 3.3V Buck Converter Module
Input 4.5V to 24V
Output 3.3V fixed
Current up to 1.8A
Size 17.5x12x4.5mm
4.6Editor score
Editor's Choice
10 Pack 3 Pins AMS1117-3.3
Input 4.75V to 12V
Output 3.3V fixed
Current up to 0.8A
3 pin single row design
4.1Editor score
Best Premium
5PCS DC-DC Step Down/Step Up Converter
Input 1.8V to 5V
Output 3.3V fixed
Current up to 100mA
Step down and step up
5.0Editor score
3.3V Regulator 5pcs Mini Reducer
Input 4.5V to 24V
Output 3.3V fixed
Current up to 1.8A
Size 17.5×12.3×4.3mm
5.0Editor score
Dorhea 7 Pack 3.3V DC-DC Buck Converter
Input 4.75V to 12V
Output 3.3V fixed
Current up to 0.8A
3 pin design for MCU
4.2Editor score
AMS1117-3.3 DC 4.75V-12V to DC 3.3V Voltage Regulator 15pcs
Input 4.75V to 12V
Output 3.3V fixed
Current up to 0.8A
Voltage accuracy ±2%
5.0Editor score
5PCS 3.3V Mini Buck Converter Board Regulator
Input 5V to 30V
Output 3.3V fixed
Current up to 1.8A
Small PCB board design
3.4Editor score
5pcs 3.3V DC-DC Buck Converter
Input 4.5V to 30V
Output 3.3V fixed
Current up to 1.8A
Works with solar panels
10PCS 5V to 3.3V DC-DC Step Down Power Supply Buck Module
Input 4.5V to 7V
Output 3.3V fixed
Current up to 0.8A
AMS1117 based module
5.0Editor score
3.3V Regulator 6pcs Mini Reducer
Input 4.5V to 24V
Output 3.3V fixed
Current up to 1.8A
MP1584EN based module
4.9Editor score
1. 5pcs 3.3V Buck Converter Module – Best Overall 5V to 3V Voltage Regulator
5pcs 3.3V Buck Converter Module DC 4.5-24V to 3.3V Voltage Regulator
Input 4.5V to 24V
Output 3.3V fixed
Current up to 1.8A
Size 17.5x12x4.5mm
This regulator offers a robust solution for stepping down voltage to 3.3V with a wide input range and strong current output. It has earned top marks for reliability and versatility in diverse electronic applications.
Pros
- Wide input voltage range
- High output current capacity
- Compact size fits tight spaces
- Low ripple for clean power
Cons
- May require external protection diodes
- Not ideal for very high heat
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Its ability to handle inputs from 4.5V to 24V means it works with many common power supplies. The 1.8A output current supports demanding loads like sensors or actuators without performance drops.
While it is efficient, users should add protection components when driving inductive loads like motors. This extra step ensures long-term reliability and protects downstream components from voltage spikes.
Buy this if you need a versatile buck converter for general electronics or portable projects. It strikes an excellent balance between performance, size, and ease of use for most hobbyists.
Wide Voltage Compatibility
The broad input range allows you to use it with various power sources including batteries or adapters without needing separate regulators.
Compact Design
Its ultra small dimensions make it perfect for wearable tech or densely packed circuit boards where space is at a premium.
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2. 10 Pack 3 Pins AMS1117-3.3 – Best Budget 5V to 3V Voltage Regulator
10 Pack 3 Pins AMS1117-3.3 DC 4.75V-12V to 3.3V Voltage Regulator
Input 4.75V to 12V
Output 3.3V fixed
Current up to 0.8A
3 pin single row design
This pack of AMS1117 based regulators provides a cost effective way to power low current devices like Arduino boards or sensors. It is simple to use and widely supported in maker communities.
Pros
- Affordable multi pack option
- Simple to solder and connect
- Overheat protection included
- Common AMS1117 chip inside
Cons
- Lower current than buck converters
- May run warm under heavy loads
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The 0.8A current limit is sufficient for most microcontrollers and small peripherals. Its overheat shutdown feature adds safety during prolonged use or slightly elevated operating temperatures.
Linear regulators like this can get warm if there is a large voltage drop. Ensure adequate airflow or consider heat sinking if using it near the upper current limit.
Choose this if you need reliable linear regulation on a budget for basic circuits. It is ideal for students or hobbyists building simple prototypes without complex power needs.
Simple Pinout
The dual panel design with single row pins makes wiring straightforward even for beginners new to electronics prototyping.
Protection Features
Built in overheat shutdown protects your project from damage if the regulator exceeds safe temperature thresholds unexpectedly.
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3. 5PCS DC-DC Step Down/Step Up Converter – Best for Low Current 5V to 3V Voltage Regulator
5PCS DC-DC Step Down/Step Up Converter 1.8V-5V to 3.3V, 100mA Max Current
Input 1.8V to 5V
Output 3.3V fixed
Current up to 100mA
Step down and step up
This converter stands out by supporting both step down and step up operations which helps when input voltages vary widely or drop below output levels. It is perfect for low power devices needing stable voltage.
Pros
- Step up and step down capability
- Works with low voltage sources
- Stable 3.3V output
- Compact module form factor
Cons
- Low current output limit
- Limited to small applications
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Its ability to start from 1.8V makes it useful for battery powered setups where voltage may sag over time. The 100mA limit is fine for sensors or low draw microcontrollers.
You will not be able to drive high current loads like motors or large displays with this unit. It is strictly designed for logic level and low power signal circuits only.
Pick this if your project runs on batteries or variable voltage sources and needs consistent 3.3V. It ensures your logic circuits stay active even as battery levels fall.
Bidirectional Conversion
Being able to step voltage up or down gives flexibility when your power source may be lower or higher than your target voltage.
Battery Friendly
The low input threshold allows operation even when battery voltage drops below typical levels extending runtime for portable devices.
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4. 3.3V Regulator 5pcs Mini Reducer – Best High Current 5V to 3V Voltage Regulator
3.3V Regulator 5pcs Mini Reducer DC 5-30V 5V 12V 24V Buck to 3.3V Buck Converter Board 1.8A Output Mini360 Small Size Power Module (3.3, Volts)
Input 4.5V to 24V
Output 3.3V fixed
Current up to 1.8A
Size 17.5×12.3×4.3mm
This buck converter delivers premium performance with high current capability and very low output ripple ideal for sensitive electronics. It is designed for users who need reliable power under varying load conditions.
Pros
- High 1.8A continuous current
- Low ripple under 30mV
- Fast switching frequency
- Very compact size
Cons
- Requires protection for inductive loads
- Higher cost than linear options
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The 1.5MHz switching frequency ensures efficient power conversion with minimal heat generation. This makes it suitable for battery powered or space constrained projects where efficiency matters.
As with most buck converters using inductive loads like motors requires added protection to avoid ripple affecting the regulator. Proper design ensures longevity and stable operation during spikes.
Invest in this for projects needing high current without overheating or voltage drops. It is excellent for robotics, portable gadgets, or any application requiring robust and clean 3.3V power.
High Current Capacity
The 1.8A output allows powering more demanding peripherals or multiple sensors simultaneously without voltage sag or overheating issues.
Low Ripple Output
Minimal ripple ensures sensitive analog components or communication modules receive clean power reducing noise and improving performance.
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5. Dorhea 7 Pack 3.3V DC-DC Buck Converter – Best for Microcontroller Projects 5V to 3V Voltage Regulator
Dorhea 7 Pack 3.3V DC-DC Buck Converter 3 Pins AMS1117-3.3V DC 4.75V-12V to 3.3V Voltage Regulator Step Down Power Supply 800mA Buck Module
Input 4.75V to 12V
Output 3.3V fixed
Current up to 0.8A
3 pin design for MCU
Designed with microcontroller development in mind this regulator simplifies power delivery to boards like Arduino or STM32. It offers stable voltage with built-in protection features to safeguard your work.
Pros
- Optimized for MCU development
- Overheat protection circuit
- Easy 3 pin connection
- Consistent 3.3V output
Cons
- Limited to 0.8A max
- Not for high current needs
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The 0.8A limit fits well within the typical power draw of most logic circuits and small sensors. This keeps costs low while ensuring enough headroom for standard projects.
If your project involves high current actuators you will need a higher capacity solution. This module is best reserved for logic level components and signal processing tasks.
Use this for general electronics prototyping where simplicity and cost effectiveness matter. It is a practical choice for classrooms or hobbyist workbenches needing reliable 3.3V.
MCU Focused
The design aligns with common development board needs reducing wiring complexity and potential setup errors during prototyping.
Safety Features
Overheat protection prevents damage to your circuit if power conditions cause the regulator to exceed safe operating temperatures.
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6. AMS1117-3.3 DC 4.75V-12V to DC 3.3V Voltage Regulator 15pcs – Best Multi-Pack Value 5V to 3V Voltage Regulator
AMS1117-3.3 DC 4.75V-12V to DC 3.3V Voltage Regulator 15pcs
Input 4.75V to 12V
Output 3.3V fixed
Current up to 0.8A
Voltage accuracy ±2%
This 15 piece pack offers excellent value for makers running multiple projects or workshops needing spares. Each unit ensures tight voltage tolerance for consistent performance across different circuits.
Pros
- High value 15 piece pack
- Precise voltage accuracy
- Built-in overheat protection
- Plug and play pinout
Cons
- Lower current than buck options
- Standard size may not fit tight
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The ±2% voltage accuracy means your sensitive components receive stable power within expected limits. This precision is crucial for reliable operation of analog sensors or communication modules.
While not ideal for high current applications the units cover most standard logic level needs. You get plenty of units to experiment or replace as needed without extra cost.
Grab this if you need bulk regulators for a makerspace or multiple prototypes. It saves time and money by stocking up on a proven linear regulator with solid specs.
Bulk Savings
Buying in larger packs reduces per unit cost and ensures you have replacements ready when building multiple circuits simultaneously.
Precision Regulation
Tight voltage tolerances help maintain signal integrity and reduce errors in circuits that depend on stable reference voltages.
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7. 5PCS 3.3V Mini Buck Converter Board Regulator – Best Compact 5V to 3V Voltage Regulator
5PCS 3.3V Mini Buck Converter Board Regulator – 5-30V to 3.3V, 1.8A Output, Small PCB Board Power Buck Module, Black
Input 5V to 30V
Output 3.3V fixed
Current up to 1.8A
Small PCB board design
This compact buck converter is designed for applications where size is a primary concern. It delivers high current output while maintaining a minimal footprint suitable for tight layouts.
Pros
- Very small footprint
- Wide input range
- High current capacity
- Reverse polarity protection
Cons
- Lower user rating
- Build quality can vary
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With support for inputs up to 30V it accommodates various battery types or higher voltage sources. This flexibility makes it versatile for portable or vehicle based electronics.
User feedback suggests checking for consistent quality before relying on large batches. Testing samples first ensures you get units that meet expectations for performance and durability.
Use this when space is extremely limited and high current is needed. It suits wearables or small form factor devices where traditional regulators would not fit.
Space Saving Design
Its tiny dimensions allow integration into projects with extremely restricted physical space like custom wearables or drones.
Safety Protection
Reverse polarity marks help prevent accidental wiring mistakes that could otherwise damage your device or regulator permanently.
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8. 5pcs 3.3V DC-DC Buck Converter – Best for Battery and Solar 5V to 3V Voltage Regulator
5pcs 3.3V DC-DC Buck Converter, 4.5V-30V to 3.3V Step Down Regulator
Input 4.5V to 30V
Output 3.3V fixed
Current up to 1.8A
Works with solar panels
This regulator is built to handle inputs from batteries or solar panels making it ideal for off grid or portable IoT devices. It ensures stable output even when input voltage fluctuates.
Pros
- Compatible with solar panels
- Wide input range
- Tested before shipping
- Suitable for IoT devices
Cons
- Limited user feedback data
- Check compatibility for your case
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Its wide input range means it can adapt to different power sources without changing hardware. Each module is tested before shipping to maintain quality standards for users.
Since ratings are unavailable confirm compatibility with your specific solar or battery voltage setup. Always verify voltage levels before connection to prevent unexpected behavior.
Choose this for outdoor or battery powered projects needing reliable voltage step down. It supports remote sensors and wearable tech where power stability is critical.
Solar Ready
The input range supports typical solar panel outputs allowing easy integration into renewable energy setups without extra converters.
Quality Control
Pre shipping testing helps ensure you receive functional units reducing the risk of defective parts affecting your prototype timeline.
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9. 10PCS 5V to 3.3V DC-DC Step Down Power Supply – Best for 5V Sources 5V to 3V Voltage Regulator
10PCS 5V to 3.3V DC-DC Step Down Power Supply Buck Module AMS1117 800MA Automatic Adjustable Boost Board Start Limit Voltage
Input 4.5V to 7V
Output 3.3V fixed
Current up to 0.8A
AMS1117 based module
This module is tailored for use with common 5V supplies such as USB ports or wall adapters. It offers a straightforward way to step down to 3.3V for compatible logic circuits.
Pros
- Optimized for 5V USB sources
- Multi piece pack
- Simple drop in replacement
- Clear start voltage limits
Cons
- Narrow input voltage range
- Lower current than buck types
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With 0.8A output it covers most microcontroller needs. The start limit voltage guidance helps prevent errors if input drops below safe thresholds.
Avoid using with inputs higher than 7V to protect the unit from damage. It is intended for low voltage logic power not heavy duty loads.
Use this for USB powered projects or breadboard setups requiring 3.3V. It is convenient for testing and prototyping without needing external voltage adjustments.
USB Compatibility
Designed to work smoothly with 5V USB sources simplifying power needs for portable electronics development or testing.
Simple Integration
Drop in compatibility means minimal circuit changes needed when switching from 5V logic to 3.3V compatible devices.
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10. 3.3V Regulator 6pcs Mini Reducer – Best for Models and Drones 5V to 3V Voltage Regulator
3.3V Regulator 6pcs Mini Reducer DC 4.75-23V 5V 12V Buck to 3.3V Buck Converter Board 1.8A Output Mini360 Small Size Aircraft Model MP1584EN Power Module(3.3 Volts)
Input 4.5V to 24V
Output 3.3V fixed
Current up to 1.8A
MP1584EN based module
Designed for aircraft models and drones this regulator handles high current demands in a tiny package. It ensures sensitive electronics receive clean power even during intense flight operations.
Pros
- High current for models
- Small size for tight spaces
- Stable under load
- Low ripple output
Cons
- Requires heat sink at high load
- Protective caps needed for motors
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The MP1584EN chip supports efficient conversion with low ripple. This reduces noise in signal lines and improves reliability for flight controllers and sensors.
Under heavy load consider adding heat sinking to maintain stable performance. Inductive loads like motors require capacitors or diodes to prevent voltage spikes affecting logic circuits.
Select this for RC or drone builds needing dependable power. It balances power delivery with size constraints typical of hobbyist model electronics.
Model Electronics Ready
Its high current and compact design make it a preferred choice for RC models where space and power are critical constraints.
Efficient Conversion
The internal chip design maximizes efficiency to reduce heat and improve flight time for battery powered model applications.
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Buying Guide – How to Choose the Best 5V to 3V Voltage Regulator
Selecting the right regulator requires understanding your power needs and physical constraints. Here are key factors to consider before making your choice.
Input Voltage Range
Check that your regulator accepts the input voltage from your power source. Buck converters typically support wider ranges like 4.5V to 24V while linear options may be narrower.
Always ensure minimum input exceeds output voltage for linear regulators to avoid dropout and instability during operation.
Output Current Capacity
Determine how much current your load needs including any peak surges. Regulators with 1.8A output are better for sensors or actuators while 0.8A suits simple microcontrollers.
Underestimating current needs can cause voltage drops or overheating. Always add a safety margin above your expected maximum draw.
Regulation Type
Buck converters offer higher efficiency and handle larger voltage drops but are slightly more complex. Linear regulators like AMS1117 are simpler and quieter but generate more heat.
Choose buck for battery or high power apps where efficiency matters. Linear works well for low power and noise sensitive circuits where simplicity wins.
Package Size and Form
Consider how much physical space is available on your board. Miniature modules like 17x12mm fit in tight enclosures but may need careful handling during soldering.
Standard packages are easier to solder but take more space. Select a form factor that matches your assembly skill and board layout needs.
Heat Management
Higher voltage differences and current draw generate more heat. Ensure there is enough airflow or plan for small heat sinks if running near limits.
Check operating temperature ratings especially for enclosed projects. Overheating can trigger shutdown or reduce lifespan over time.
Protection Features
Look for built-in protections like overheat or overcurrent to protect your circuit from shorts or misuse. Some units include reverse polarity indicators.
External components like diodes or capacitors may still be needed for inductive loads. Review datasheets for recommended protection circuits.
Voltage Stability
Low ripple output is critical for analog sensors or sensitive logic. Buck converters vary in ripple performance so check specs carefully.
Stable voltage ensures consistent performance and prevents glitches. If precision matters choose regulators with explicit ripple limits under 30mV.
Cost and Quantity
Multi packs reduce cost per unit and provide spares for prototyping. Compare value based on specs and quantity needed for your projects.
Don't sacrifice quality for price on critical components. A slightly higher cost for proven brands may save time fixing issues later.
How to Use and Care for Your 5V to 3V Voltage Regulator
Connect input wires to VIN and ground and output to VOUT and ground. Always double check pinouts since layouts vary between linear and buck modules.
For motor or servo loads add a protection diode across the load to absorb back EMF spikes. Place a capacitor near the regulator to smooth noise and improve stability.
Allow space for airflow around the unit especially under high current. If it becomes too hot to touch reduce load or add a small heat sink.
Frequently Asked Questions
What is the difference between buck and linear regulators for 5V to 3.3V conversion?
Buck converters use switching to efficiently step down voltage and handle higher currents with less heat. Linear regulators are simpler and quieter but waste more energy as heat during voltage drop.
Can I use a 5V to 3.3V regulator with a 12V supply?
Yes but only if the regulator supports inputs up to 12V. Check the input range specified. Buck converters often support this while linear ones may require lower inputs.
Do I need extra components when using this with motors?
Yes adding a diode and capacitor protects the regulator from voltage spikes caused by motor back EMF. Without protection inductive loads can damage the circuit over time.
How do I know how much current my project needs?
Add up the current ratings of all connected components from datasheets. Include extra margin for peak activity to prevent voltage drops during operation.
Why does my regulator get hot under use?
Heat comes from voltage difference times current. Linear types heat more than buck converters. If it gets too hot reduce load or provide airflow and heat sinking.
Is 3.3V always fixed on these modules?
Most listed modules output fixed 3.3V. Some have trim pots but these are rare. Verify the product title or specs before purchase to confirm output type.
Can I wire multiple regulators together for more current?
No paralleling regulators risks uneven current sharing and damage. Select a single regulator rated for your total required current instead.
What input voltage is safest for Arduino boards?
For Arduino boards needing 3.3V use a 5V to 3.3V regulator with input above 3.3V and below max rating. A stable 5V supply works well for most cases.
Final Thoughts on Choosing the Best 5V to 3V Voltage Regulator
The five featured picks cover a wide range of needs from budget linear units to high current buck modules. Each excels in specific scenarios whether for battery power or high load projects.
Prioritize input range and current capacity to match your power source and load. Also consider physical size and thermal needs to ensure long term reliability in your enclosure.
Prices and stock vary so verify current details before purchase. Use this guide to choose confidently and power your next electronics build without worries.