Dorhea 7 Pack 3.3V DC-DC Buck Converter 3 Pins AMS1117-3.3V
4.2Editor score
Linear LDO regulator design
Simple 3 pin connection
Affordable multi pack value
In this guide
Finding the right voltage regulator is crucial for powering sensitive electronics like microcontrollers and sensors reliably. A good 5V to 3V voltage regulator ensures stable output without noise or fluctuation.
We evaluated ten popular modules based on efficiency, current capacity, size, and protection features to help you choose the best fit for your project needs quickly and confidently.
Each pick highlights key specs and real-world performance. Remember that stock and pricing change frequently so always verify current availability before making your final purchasing decision online.
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
Stable 3.3V output up to 1.8A
Ultra small compact size design
3.3V Regulator 6pcs Mini Reducer DC 4.75-23V 5V 12V Buck to 3.3V
4.9Editor score
High current 1.8A output
Mini360 power module base
Low ripple clean power
Top 10 Best 5V to 3V Voltage Regulator in 2026 Compared
This side by side comparison breaks down the key specifications and features of each module to help you quickly identify the best option for your specific voltage conversion needs.
ProductsSpecificationsEditor scorePrice
Editor's Choice
5pcs 3.3V Buck Converter Module DC 4.5-24V to 3.3V Voltage Regulator
Input 4.5V to 24V
Output 3.3V fixed
Max current 1.8A
Switching frequency 1MHz
4.6Editor score
Editor's Choice
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
Max current 0.8A
Linear regulator type
4.1Editor score
Best Premium
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
Max current 100mA
Step down up converter
5.0Editor score
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
Max current 1.5A
Mini360 module base
5.0Editor score
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
Max current 800mA
Simple 3 pin design
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
Max current 800mA
Built in protection
5.0Editor score
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
Max current 1.8A
Small PCB board size
3.4Editor score
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
Max current 1.8A
Ready for Arduino
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
Max current 800mA
Linear LDO type
5.0Editor score
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
Max current 1.8A
Low ripple output
4.9Editor score
1. 5pcs 3.3V Buck Converter Module DC 4.5-24V to 3.3V Voltage Regulator – Best Overall 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
Max current 1.8A
Low ripple under 30mV
This buck converter module stands out as the top overall choice for converting 5V or higher inputs to a stable 3.3V supply. It combines efficiency, small size, and high current capacity for reliable performance in most electronics projects.
Pros
- Wide input voltage range
- High current capability
- Very small size
- Low output ripple noise
- Affordable 5 pack
Cons
- Requires protection for inductive loads
- Soldering skills needed
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Its wide input range from 4.5V to 24V makes it compatible with common 5V, 9V, 12V, and 24V power supplies without extra components. The output ripple stays under 30mV which keeps sensitive microcontrollers and sensors safe from noise.
The main trade off is that inductive loads like motors need external diodes and capacitors for protection to prevent voltage spikes from damaging the module. You will also need to solder wires for connection since it comes bare board.
This module is ideal for hobbyists building drones IoT devices or portable electronics needing clean and efficient power conversion. It offers the best balance of performance and value for most general use cases today.
Wide Input Compatibility
Accepts 4.5V to 24V input allowing use with batteries adapters and vehicle power without redesigning circuits.
Compact Design
Measures only 17.5x12x4.5mm making it easy to fit into tight PCB layouts and portable enclosures.
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2. 10 Pack 3 Pins AMS1117-3.3 DC 4.75V-12V to 3.3V Voltage Regulator – Best Linear Regulator Option
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
Max current 0.8A
Simple 3 pin design
This pack of AMS1117 based modules offers a straightforward linear regulation solution for stepping 5V or 9V down to 3.3V. The simple 3 pin layout makes it perfect for beginners and quick prototyping tasks.
Pros
- Very easy to connect
- Affordable price
- Includes 10 pieces
- Overheat protection included
Cons
- Limited to lower input voltages
- Less efficient than switching regulators
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The AMS1117 chip provides reliable output with built in overheat shutdown protection to prevent damage under heavy load. It handles up to 0.8A which is sufficient for powering most low current microcontrollers and sensors easily.
As a linear regulator it dissipates excess voltage as heat so it is less efficient for larger voltage drops or higher current demands. The input range is also capped at 12V limiting compatibility with 12V to 24V supplies.
Choose this for simple 5V projects where efficiency is not critical and you want an affordable and easy to use solution. The 10 pack ensures you have spares for multiple boards or failed parts.
Easy Connection
Single row 2 pin input output design simplifies wiring to Arduino and other common development boards.
Overheat Protection
Built in shutdown circuit activates if temperature gets too high protecting the regulator from overheating damage.
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3. 5PCS DC-DC Step Down/Step Up Converter 1.8V-5V to 3.3V, 100mA Max Current – Best Low Current Converter
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
Max current 100mA
Step down up converter
This converter is unique because it can step up voltages from 1.8V to 3.3V as well as step down from 5V to 3.3V making it ideal for battery powered projects using lithium cells.
Pros
- Works with inputs below 3.3V
- Very small footprint
- Simple plug and play
- Perfect for batteries
Cons
- Only 100mA max current
- Limited to low voltage inputs
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It handles up to 100mA which is enough for low power sensors and microcontrollers in sleep modes. The tiny size allows mounting in wearables and small portable devices without taking up much space.
Its low current limit means it cannot power motors or displays directly. It is also not suitable for higher voltage inputs like 9V or 12V since the max input is only 5V.
Use this when working with single cell lithium batteries or small button cells where boosting to 3.3V is needed. It delivers clean power for sensitive electronics in compact portable applications.
Bidirectional Conversion
Can boost or buck voltage allowing use with inputs ranging from 1.8V up to 5V flexible for batteries.
Compact Size
Very small physical footprint fits easily into space constrained projects like wearables and handheld devices.
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4. 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) – Best Mini360 Module
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
Max current 1.5A
Mini360 module base
This Mini360 based module delivers excellent performance with up to 1.5A continuous current and low ripple output. It is perfect for powering demanding microcontrollers and peripherals from higher voltage inputs like 12V or 24V.
Pros
- High current up to 1.5A
- Very small size
- Low ripple output
- Compatible with high voltages
Cons
- Needs heat sink at high load
- Requires external components for motors
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Its compact size of 17.5×12.3×4.3mm makes it suitable for tight PCB spaces while still providing enough power for most embedded applications. The 1MHz switching frequency keeps noise manageable for sensitive electronics.
At high currents the module may get warm so adding a heat sink improves reliability. Inductive loads still require external protection components to avoid voltage spikes damaging the regulator chip.
Choose this for projects needing more power in a small footprint. It is well suited for automation robotics and industrial electronics where stable and efficient power is essential.
Mini360 Efficiency
Uses proven Mini360 IC for high efficiency and small size without compromising output stability or current capacity.
Versatile Input
Handles inputs up to 24V allowing use with 12V or 24V power supplies common in industrial and hobby projects.
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5. 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 – Best Budget Option
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
Max current 800mA
7 pack value
This budget friendly pack provides reliable LDO regulation for powering 3.3V devices from 5V or 9V sources. The simple 3 pin design and low cost make it a favorite for hobbyists building multiple small projects.
Pros
- Very affordable price
- Simple connection design
- Includes 7 modules
- Built in thermal protection
Cons
- Linear design runs hot
- Limited to 12V input
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Each module delivers up to 800mA which covers most microcontroller needs. The built in thermal protection prevents permanent damage during brief overloads though continuous high load can heat the device.
As a linear regulator it wastes power as heat and cannot handle high input voltages. For large projects or battery saving you might prefer a switching regulator but this offers great value.
Buy this if you need cheap and simple regulators for low power boards and do not mind some heat. The 7 pack gives plenty for building several prototypes at once.
Affordable Bulk Pack
Seven modules provide excellent value for classroom kits or multiple small project builds without high costs.
Simple to Use
Straightforward pinout matches common dev board power headers so connection takes minimal effort or tools.
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6. AMS1117-3.3 DC 4.75V-12V to DC 3.3V Voltage Regulator 15pcs – Best Value Pack
AMS1117-3.3 DC 4.75V-12V to DC 3.3V Voltage Regulator 15pcs
Input 4.75V to 12V
Output 3.3V fixed
Max current 800mA
15 piece count
This 15 piece pack delivers the highest quantity per dollar among linear regulators making it ideal for classrooms or multi board deployments. Each module provides stable 3.3V output up to 800mA safely.
Pros
- Includes 15 pieces
- Overheat protection
- Wide battery range
- Overcurrent protection
Cons
- Linear type runs hot
- No built in filtering caps
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Features like overheat and overcurrent protection increase reliability under stress. The dynamic voltage difference control reduces power consumption during battery use slightly improving efficiency over standard LDOs.
It is limited to input voltages up to 12V and dissipates excess heat. You may need to add external capacitors for optimal performance though many users find them unnecessary for simple loads.
Pick this pack if you need many identical regulators for small projects or teaching labs. It is a practical solution for powering small electronics where high efficiency is not critical.
Dynamic Voltage Control
Adjusts impedance dynamically to minimize voltage difference which saves battery life compared to standard regulators.
High Quantity
15 pieces ensure enough stock for multiple boards or replacements in larger electronics projects without extra orders.
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7. 5PCS 3.3V Mini Buck Converter Board Regulator – 5-30V to 3.3V, 1.8A Output, Small PCB Board Power Buck Module, Black – Best Compact High Current
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
Max current 1.8A
Reverse polarity protection
This compact buck converter supports inputs up to 30V and outputs up to 1.8A making it versatile for higher voltage supplies and power hungry devices alike. Its tiny size fits into tight enclosures easily.
Pros
- Wide input voltage range
- High current capability
- Very small size
- Reverse polarity protection
Cons
- Lower user ratings
- Quality control varies
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Reverse polarity markings help prevent connection mistakes and protect the circuit. The low ripple output and switching frequency provide clean power for most microcontrollers and sensors without extra filtering.
User ratings are lower due to inconsistent quality and some units failing under high heat. You should test each module before integrating into permanent builds to avoid unexpected failures.
Use this when you need a small and affordable high current solution but are prepared to check units first. It works well for prototypes and temporary setups where bulk is a priority.
Polarity Protection
Board markings show correct input polarity reducing risk of damage from accidental reversed connections during wiring.
Small Footprint
Measures only 0.67×0.24×0.16 inches fitting into very tight spaces where larger modules would not fit.
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8. 5pcs 3.3V DC-DC Buck Converter, 4.5V-30V to 3.3V Step Down Regulator – Best Wide Input Range
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
Max current 1.8A
Tested before shipping
This converter supports an unusually wide input range from 4.5V to 30V making it ideal for vehicle power systems or solar setups with fluctuating voltage. Each unit is tested before shipping for quality assurance.
Pros
- Wide input range
- High current output
- Low ripple noise
- 5 pack availability
Cons
- No user rating data
- Soldering required
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It delivers up to 1.8A with clean low ripple output suitable for powering Raspberry Pi and ESP32 boards directly. The compact size fits wearable and IoT device enclosures without taking much space.
The lack of user reviews means performance consistency is less proven than other options. You should also plan to solder wires for connection since no connector headers are included out of the box.
Choose this for automotive or solar powered projects where input voltage varies significantly. It offers reliable conversion with minimal noise for sensitive electronics and modern microcontrollers.
Solar and Vehicle Ready
Accepts voltages from solar panels and car batteries so it adapts to real world power variations easily.
Quality Tested
Each module gets tested before shipping reducing risk of defective units arriving in your order.
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9. 10PCS 5V to 3.3V DC-DC Step Down Power Supply Buck Module AMS1117 800MA Automatic Adjustable Boost Board Start Limit Voltage – Best for Low Cost Bulk
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
Max current 800mA
10 pack included
This bulk pack of AMS1117 based modules provides an inexpensive way to add 3.3V power to many small boards. It works well for low power projects where efficiency is less critical.
Pros
- Very affordable
- Simple design
- Includes 10 pieces
- Low heat operation
Cons
- Limited input voltage
- Linear type inefficiency
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With input voltage between 4.5V and 7V it fits perfectly for USB powered projects using 5V sources. The current limit of 800mA handles microcontrollers and sensors comfortably for most use cases.
It cannot handle higher input voltages and wastes power as heat under load. You should avoid using it with 9V or 12V adapters as it may overheat and fail quickly.
Buy this for classroom kits or multiple simple projects where you need many regulators cheaply. It is a practical choice for low voltage 5V powered electronics needing 3.3V output.
Low Voltage Optimization
Optimized for inputs between 4.5V and 7V matching USB and common battery supplies without excess heat.
10 Piece Pack
Ten pieces allow building ten boards or having spares for a group project without additional costs.
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10. 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) – Best Premium Module
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
Max current 1.8A
Low ripple clean power
This premium buck converter delivers top tier performance with high efficiency and low ripple output. It handles up to 1.8A continuously making it ideal for power hungry microcontrollers and peripherals in demanding applications.
Pros
- High current output
- Low ripple noise
- Efficient switching design
- Includes 6 units
Cons
- Higher price than linear
- Inductive load protection needed
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Its compact design and wide input range from 4.5V to 24V allow flexible use with batteries or higher voltage supplies. The MP1584EN based module provides reliable and stable power without excessive heat generation.
It costs more than linear regulators but offers better efficiency and current capacity. For inductive loads you will still need external protection diodes to avoid spikes from damaging the board.
Choose this for professional or high performance projects needing stable and efficient power. It is excellent for robotics drones and industrial systems where reliability matters.
Premium Efficiency
Uses MP1584EN switching architecture for high efficiency and low heat even at full 1.8A current load.
Low Ripple Output
Keeps output ripple under 30mV protecting sensitive digital and analog circuits from noise interference.
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Buying Guide – How to Choose the Best 5V to 3V Voltage Regulator
Selecting the right regulator depends on your input voltage current needs efficiency requirements and physical constraints. This guide breaks down the key factors to help you decide.
Input Voltage Range
Ensure the module accepts your source voltage. Switching regulators often accept 4.5V to 24V or higher while linear ones may cap at 12V or less. Picking the wrong range can lead to failure or inefficient operation.
Always check the specified input range matches your power supply to avoid damaging the regulator.
Output Current Capacity
Calculate the total current your load needs including all connected components. Some regulators output 800mA while others reach 1.8A or more. Exceeding the limit causes overheating and unstable output.
Choose a regulator rated higher than your maximum expected load for safe and reliable performance.
Efficiency and Heat
Switching regulators are far more efficient than linear ones especially when stepping down from higher voltages. Efficiency reduces wasted energy and heat which is critical for battery powered or enclosed designs.
Use switching regulators for higher efficiency and linear regulators only for simple low voltage applications.
Output Ripple and Noise
Low ripple output is essential for sensitive microcontrollers and sensors to prevent glitches or false readings. Most buck modules keep ripple below 30mV which is acceptable for most digital electronics.
Prioritize modules with low ripple specs for stable and noise free operation.
Size and Form Factor
Compact regulators fit better in small projects and portable devices. Consider the PCB footprint and height constraints when selecting. Mini360 style modules offer great balance between size and performance.
Select a module that fits your enclosure and PCB layout without requiring major redesign.
Protection Features
Built in overheat overcurrent and reverse polarity protection increase safety and durability. These features prevent permanent damage during short circuits or wiring mistakes.
Choose regulators with protection circuits for robust and reliable long term operation.
Ease of Use
Some modules require soldering while others have headers. Simple pin layouts speed up prototyping and reduce errors for beginners. Consider connection methods for your skill level.
Pick modules with convenient pinouts and connectors that match your project needs.
Price and Quantity
Multi packs reduce cost per unit and are useful for classrooms or bulk builds. Compare price against specs to find the best value for your project count.
Buy multi packs if you need several units to save money overall.
How to Use and Care for Your 5V to 3V Voltage Regulator
Connect the input pins to your power source ensuring correct polarity. Solder wires securely to prevent loose contacts and use heat shrink tubing for insulation.
Attach a small heat sink if running near maximum current to prevent overheating. Monitor temperature during initial testing to ensure safe operation under load.
For inductive loads like motors add a protection diode across the coil. This suppresses voltage spikes and protects the regulator from damage.
Frequently Asked Questions
Can I use a 5V to 3.3V regulator with a 12V power supply?
Yes if the regulator supports input voltages up to 12V or higher. Buck modules typically handle up to 24V or 30V. Linear regulators may not accept 12V without overheating. Always check input specs.
What is the difference between linear and switching regulators?
Linear regulators are simple but dissipate excess voltage as heat. Switching regulators convert voltage more efficiently with less heat but are slightly more complex. Switching is better for higher currents or battery powered projects.
Do I need capacitors with these modules?
Most modules include built in capacitors but adding extra 10uF capacitors near inputs improves stability. Check datasheets for recommendations especially if using long wires or noisy power sources.
Why does my regulator get hot under load?
Linear regulators heat up when the voltage drop is large. Switching modules get warm at high current. Add a heat sink or reduce load current. If very hot, check for short circuits or overloading.
Can I connect multiple regulators in parallel for more current?
Parallel connection is generally not recommended because regulators may not share current evenly. Instead choose a single regulator with sufficient current capacity. Parallel can lead to instability and failure.
Are these regulators suitable for Arduino boards?
Yes most work with 3.3V logic Arduino boards like ESP32 and STM32. Ensure output voltage matches the board requirement. Some 5V Arduinos can run directly from 5V input without extra regulators.
What should I do if the output voltage is unstable?
Check connections and ensure input voltage is within range. Add capacitors if missing. Verify load current does not exceed ratings. Replacing a faulty unit may be needed if instability persists.
Are these modules safe for battery powered projects?
Yes switching regulators are efficient for battery use reducing drain. Linear regulators waste more battery energy. Choose low quiescent current modules for long battery life and portable applications.
Final Thoughts on Choosing the Best 5V to 3V Voltage Regulator
We reviewed ten top voltage regulators ranging from efficient buck converters to simple linear modules. Each offers unique strengths depending on input voltage current needs and physical constraints.
Prioritize input range efficiency and current capacity when making your decision. Switching regulators save battery life and run cooler for most applications while linear options suit simple low voltage tasks.
Always verify current pricing and availability before purchasing. Conditions change often so confirm specs match your project needs for the best results.