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
4.2Editor score
Linear AMS1117 regulator chip
800mA current output capacity
Simple three pin design
In this guide
Finding the right voltage regulator is essential for powering sensitive electronics like microcontrollers and sensors. A good 5V to 3V regulator ensures stable output with low ripple to prevent device damage or malfunction.
We compared ten highly rated products based on efficiency, size, current capacity, and user feedback. This list covers both linear and switching regulators to suit various project needs and budget constraints.
Each pick highlights key features and real-world applications to help you choose quickly. Keep in mind that availability and pricing can change, so check the links for the latest details before buying.
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
Stable 3.3V output up to 1.8A
Compact 17.5mm by 12mm size
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)
4.9Editor score
MP1584EN high efficiency chip
1.8A max current output
Ultra small 17mm by 11mm size
Top 10 Best 5V to 3V Voltage Regulator in 2026 Compared
Below you will find a side by side comparison of all ten products to help you quickly spot the best fit for your power needs.
ProductsSpecificationsEditor scorePrice
Editor's Choice
5pcs 3.3V Buck Converter Module DC 4.5-24V to 3.3V Voltage Regulator
4.5V to 24V input
3.3V fixed output
Up to 1.8A current
17.5mm by 12mm size
4.6Editor score
Editor's Choice
10 Pack 3 Pins AMS1117-3.3 DC 4.75V-12V to 3.3V Voltage Regulator
4.75V to 12V input
3.3V fixed output
Up to 0.8A current
Linear AMS1117 regulator
4.1Editor score
Best Premium
5PCS DC-DC Step Down/Step Up Converter 1.8V-5V to 3.3V, 100mA Max Current
1.8V to 5V input
3.3V fixed output
Up to 100mA current
Step up and down
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)
4.5V to 24V input
3.3V fixed output
Up to 1.5A current
Small 17mm by 12mm size
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
4.75V to 12V input
3.3V fixed output
Up to 0.8A current
Simple three pin design
4.2Editor score
AMS1117-3.3 DC 4.75V-12V to DC 3.3V Voltage Regulator 15pcs
4.75V to 12V input
3.3V fixed output
Up to 0.8A current
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
5V to 30V input
3.3V fixed output
Up to 1.8A current
Reverse polarity protection
3.4Editor score
5pcs 3.3V DC-DC Buck Converter, 4.5V-30V to 3.3V Step Down Regulator
4.5V to 30V input
3.3V fixed output
Up to 1.8A peak
Under 30mV ripple
10PCS 5V to 3.3V DC-DC Step Down Power Supply Buck Module AMS1117 800MA Automatic Adjustable Boost Board Start Limit Voltage
4.5V to 7V input
3.3V fixed output
Up to 0.8A current
Linear AMS1117 regulator
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)
4.5V to 24V input
3.3V fixed output
Up to 1.8A current
Small 17mm by 11mm size
4.9Editor score
1. 5pcs 3.3V Buck Converter Module DC 4.5-24V to 3.3V Voltage Regulator – Best Overall
5pcs 3.3V Buck Converter Module DC 4.5-24V to 3.3V Voltage Regulator
4.5V to 24V input
3.3V fixed output
Up to 1.8A current
Low ripple output
This pack of buck converters is our top choice for general purpose 5V to 3V power conversion. It offers a broad input range from 4.5V to 24V which makes it versatile for many power sources including batteries and adapters.
Pros
- Wide input voltage range
- Stable output under load
- Compact size saves space
- Excellent value in 5 pack
- Low heat generation
Cons
- Needs capacitor for inductive loads
- No on board indicator
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Each module delivers a stable 3.3V output with less than 30 millivolts ripple thanks to a switching frequency of 1 megahertz to 1.5 megahertz. The compact 17.5mm by 12mm footprint allows it to fit easily into tight enclosures.
While the design is straightforward it does require external protection diodes when driving motors or servos to avoid voltage spikes. This is a common requirement for switching regulators and does not detract from its overall performance.
Hobbyists and makers will appreciate the five module pack which is ideal for prototyping multiple circuits or sharing with friends. We recommend this regulator for any project needing reliable low voltage power from varied input sources.
Wide Input Compatibility
The 4.5V to 24V input range means you can use this with almost any common power supply without worrying about overvoltage or undervoltage issues.
Low Ripple Power
The low ripple output ensures clean power for sensitive microcontrollers and sensors reducing the risk of resets or measurement errors.
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2. 10 Pack AMS1117 – Simple Linear Power
10 Pack 3 Pins AMS1117-3.3 DC 4.75V-12V to 3.3V Voltage Regulator
4.75V to 12V input
3.3V fixed output
Up to 0.8A current
Linear regulator
This AMS1117 based regulator provides a straightforward linear solution for stepping down voltages to 3.3V. It is a great choice for low noise applications where efficiency is not the primary concern.
Pros
- Simple three pin design
- No external components needed
- Affordable 10 pack
- Over heat protection
Cons
- Less efficient than switching
- Limited to 12V input
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The module supports input voltages from 4.75V to 12V and delivers a steady 0.8A output. The dual panel design with single row pins makes it easy to connect to breadboards or PCB headers.
Linear regulators do dissipate more heat than switching types especially with large voltage differences but this unit includes over heat shutdown for safety. It is best used in low to medium current scenarios.
For simple electronics projects like Arduino boards or sensor arrays this regulator offers a reliable and cost effective power supply. The 10 pack ensures you have plenty on hand for multiple builds.
Low Noise Output
Linear regulators like the AMS1117 produce minimal electrical noise making them suitable for sensitive analog circuits.
Ease of Use
The three pin layout simplifies wiring and reduces the chance of incorrect connections during assembly.
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3. 5PCS Step Up/Down – Flexible Low Power
5PCS DC-DC Step Down/Step Up Converter 1.8V-5V to 3.3V, 100mA Max Current
1.8V to 5V input
3.3V fixed output
Up to 0.1A current
Buck boost
This converter stands out because it can step up or down to maintain a steady 3.3V output from inputs as low as 1.8V. This feature is essential for battery powered devices that drain over time.
Pros
- Handles input below 3.3V
- Stable 3.3V output
- Perfect for small sensors
- Five pack value
Cons
- Limited to 100mA current
- Not for high power
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With a maximum current of 100mA it is well suited for low power microcontrollers and sensors that do not require much energy. The ability to handle a wide input range ensures consistent performance.
The main limitation is the low current capacity which means it cannot drive motors or high draw components. For tiny projects this is rarely an issue but it is important to check your power needs.
If you are building a small IoT device or a wearable this regulator is a smart choice for maintaining voltage stability. The five pack offers good value for prototyping multiple low power prototypes.
Battery Friendly
The step up capability allows you to use batteries even when their voltage drops below 3.3V keeping your device running longer.
Compact Design
Its small footprint makes it easy to integrate into compact designs where space is limited.
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4. 5pcs Mini Reducer – Small and Capable
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)
4.5V to 24V input
3.3V fixed output
Up to 1.5A current
Mini360 module
This Mini360 based regulator delivers a high current 1.5A output from a very small 17mm by 12mm board. It is an excellent option for projects that need more power but have limited space.
Pros
- Very small dimensions
- High current capacity
- Low ripple output
- 5 pack included
Cons
- Requires protection for motors
- No on board switch
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The input range of 4.5V to 24V covers most common voltage sources and the output ripple is kept under 30 millivolts. The high switching frequency ensures efficient power conversion with less heat.
Like other buck converters it is advisable to add protection components when using inductive loads to avoid voltage spikes. The overall design is robust and well suited for demanding applications.
Users will find this pack ideal for robotics or portable electronics that require stable high current power. The combination of size and performance makes it a strong contender for many builds.
High Efficiency
The switching design minimizes heat loss allowing for continuous operation without large heat sinks.
Versatile Input
Accepting up to 24V input means it can work with 12V or 24V batteries directly.
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5. Dorhea 7 Pack – Affordable Linear 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
4.75V to 12V input
3.3V fixed output
Up to 0.8A current
Linear regulator
This Dorhea pack offers a budget friendly solution for projects that do not need switching efficiency. It is a solid choice for low current applications where simplicity and cost are key.
Pros
- Very affordable price
- Seven modules in pack
- Easy to solder
- Built in overheat
Cons
- Limited to 12V input
- Higher heat at load
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The module supports up to 800mA output and includes overheat protection to prevent damage. The three pin design ensures that wiring is quick and straightforward for any skill level.
Keep in mind that the linear topology generates more heat than switching regulators especially with higher input voltages. It is best used when the input voltage is close to the output voltage.
For hobbyists on a tight budget this pack provides excellent value. You can build multiple projects without worrying about spending much on power regulation components.
Simple Integration
The standard pin layout matches many development boards making it easy to drop into existing circuits.
Low Cost
At this price point it is one of the most cost effective options available for small scale projects.
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6. 15pcs AMS1117 – Large Value Pack
AMS1117-3.3 DC 4.75V-12V to DC 3.3V Voltage Regulator 15pcs
4.75V to 12V input
3.3V fixed output
Up to 0.8A current
Fifteen pack
This fifteen pack of AMS1117 regulators is perfect for makers who run frequent projects or need spare parts. The output accuracy of plus or minus two percent ensures consistent performance across the batch.
Pros
- Large 15 piece quantity
- Solid output accuracy
- Overheat protection
- Great for bulk use
Cons
- Linear efficiency limits
- No mounting holes
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Each module provides up to 800mA of current and includes built in overheat protection. The dynamic voltage difference control helps reduce power consumption in battery powered scenarios.
Since it is a linear regulator efficiency is lower than switching options but this is acceptable for many low power applications. The plug and play design simplifies installation on prototyping boards.
If you need a large supply of reliable regulators for a workshop this pack is a smart investment. It eliminates the need to order small quantities repeatedly and saves time over the long run.
Large Quantity
Getting fifteen units at once ensures you always have replacements ready without waiting for shipping.
Accuracy
The tight voltage tolerance helps keep sensitive electronics stable under varying loads.
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7. 5pcs Mini Buck Converter – High Current Capacity
5PCS 3.3V Mini Buck Converter Board Regulator – 5-30V to 3.3V, 1.8A Output, Small PCB Board Power Buck Module, Black
5V to 30V input
3.3V fixed output
Up to 1.8A current
Reverse polarity mark
This buck converter board stands out for its ability to deliver up to 1.8A from a tiny footprint. The input range from 5V to 30V makes it flexible for various power sources.
Pros
- High 1.8A output
- Wide input range
- Reverse polarity protection
- Compact PCB
Cons
- Lower user rating
- Inconsistent reports
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Features like reverse polarity protection help prevent damage if the power leads are connected incorrectly. The stable output ripple under 30 millivolts ensures clean power for sensitive devices.
While the product offers strong specs the user rating suggests some inconsistencies in quality or performance. It is worth testing each unit before final assembly to ensure reliability.
For projects requiring higher current this board is a capable option. Just be sure to verify its performance to match your specific needs before relying on it for critical circuits.
High Current
The 1.8A capacity allows for powering larger microcontrollers or small servos without additional boosters.
Safety
Reverse polarity protection adds a layer of safety against wiring mistakes during prototyping.
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8. 5pcs Step Down – Robust Input Range
5pcs 3.3V DC-DC Buck Converter, 4.5V-30V to 3.3V Step Down Regulator
4.5V to 30V input
3.3V fixed output
Up to 1.8A peak
Low ripple
This buck converter handles a very wide input range of up to 30V making it suitable for industrial or automotive power systems. It delivers a stable 3.3V output with low ripple.
Pros
- Up to 30V input
- Solder ready
- Compact 17mm size
- Five pack
Cons
- No rating data
- Limited info
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Each unit is sold in a five pack ready for prototyping. The compact dimensions allow it to fit into wearable or IoT devices easily.
The lack of customer reviews means testing is recommended before deployment. It is designed for common microcontrollers and LED strips with simple wire connections.
For versatile power needs this regulator offers a strong feature set. Just ensure you test each module to confirm performance before integrating it into critical designs.
Wide Voltage
Handling up to 30V allows use with 24V industrial rails or vehicle electrical systems.
Compact Size
The small form factor suits tight enclosures and portable electronics.
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9. 10PCS AMS1117 – Reliable Linear
10PCS 5V to 3.3V DC-DC Step Down Power Supply Buck Module AMS1117 800MA Automatic Adjustable Boost Board Start Limit Voltage
4.5V to 7V input
3.3V fixed output
Up to 0.8A current
AMS1117 chip
This ten pack of AMS1117 regulators provides a simple solution for stepping down 5V to 3.3V. It is ideal for low current projects that prioritize reliability over efficiency.
Pros
- Ten module pack
- 5V to 7V range
- Stable output
- Simple design
Cons
- Limited to 7V input
- Linear inefficiency
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The input range of 4.5V to 7V covers most USB and 5V adapter sources. The 800mA limit is sufficient for most microcontrollers and sensors.
Since it is linear it may get warm with high loads but the module is designed to handle this safely. The automatic adjustable boost board ensures consistent performance.
For users needing a straightforward and affordable regulator for standard electronics this pack is a reliable choice. It simplifies power management for breadboard and PCB projects.
USB Compatible
The 5V input support makes it easy to power from USB sources for portable prototypes.
Ten Pack
Having ten units ensures you can work on multiple projects without waiting for additional shipments.
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10. 6pcs Mini Reducer – Premium MP1584EN
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)
4.5V to 24V input
3.3V fixed output
Up to 1.8A current
MP1584EN chip
This pack uses the MP1584EN chip which is known for high efficiency and performance. With a 1.8A output and ultra compact size it is perfect for demanding portable or small projects.
Pros
- Premium MP1584EN chip
- High 1.8A output
- Very small size
- Excellent user rating
Cons
- Requires protection for motors
- Higher price per unit
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The input range of 4.5V to 24V covers most common power supplies. The 1.5MHz switching frequency keeps ripple low and efficiency high.
Like other buck regulators you should add protection components when driving inductive loads. The small 17mm by 11mm size is ideal for aircraft models or drones.
For those seeking a high end regulator with excellent performance this pack is worth the investment. It delivers professional grade results for hobbyists and professionals alike.
Premium Chip
The MP1584EN offers superior efficiency and stability compared to basic regulators.
Lightweight
The small size and light weight make it perfect for weight sensitive applications like drones.
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Buying Guide – How to Choose the Best 5V to 3V Voltage Regulator
Choosing the right voltage regulator depends on your power needs and project constraints. Here are key factors to consider.
Input Voltage Range
Ensure the regulator accepts your power source voltage. Some units accept 5V only while others handle up to 24V or 30V.
Select a model with an input range that covers your intended power supply.
Output Current
Check the maximum current your load requires. Switching regulators often support up to 1.8A while linear ones may max out at 800mA.
Choose a regulator with current headroom to avoid overheating or voltage drops.
Efficiency vs Noise
Switching regulators are efficient but may produce noise. Linear regulators are quieter but generate more heat.
Use switching types for battery efficiency and linear for noise sensitive circuits.
Size and Mounting
Compact modules save space on PCBs. Look for small dimensions if you are building portable devices.
Verify mounting holes or solder pin spacing matches your project.
Protection Features
Features like overheat or overcurrent protection add safety. Some units also have reverse polarity marks.
Prioritize regulators with built in protection for reliability.
Ripple and Stability
Low output ripple ensures clean power for sensitive components. Aim for under 30 millivolts if possible.
Stable output prevents random resets in microcontrollers.
Pack Quantity
Buying packs of 5 to 15 offers value. Ensure the pack size fits your project needs.
Consider stocking spares for future builds.
Price and Value
Compare price per unit across packs. Higher quality chips may cost more but perform better.
Balance budget with required performance for your application.
How to Use and Care for Your 5V to 3V Voltage Regulator
Connect the input and output pins correctly. Most modules mark V in GND and Vout on the PCB.
Avoid connecting directly to inductive loads without protection diodes to prevent voltage spikes.
Check the voltage output with a multimeter before attaching sensitive electronics to confirm accuracy.
Frequently Asked Questions
Is a linear regulator better than a switching one for 3.3V power?
Linear regulators are simpler and quieter which suits noise sensitive circuits. Switching regulators are more efficient and handle higher currents better. Choose based on your heat and noise constraints.
Can I use a 5V regulator with a 9V battery?
Not all 5V regulators accept 9V. Check the input voltage range. Some buck converters accept up to 24V or 30V so they work fine with 9V sources.
Do these regulators need capacitors?
Switching converters often work without external capacitors but adding them near the pins improves stability. Linear regulators may need input and output capacitors for best performance.
What is the difference between buck and linear regulators?
Buck regulators switch power to reduce voltage efficiently. Linear regulators dissipate excess voltage as heat. Buck types are better for higher currents and battery life.
How do I know if my regulator is overheating?
If the regulator gets too hot to touch or the output voltage drops under load it may be overheating. Ensure you are not exceeding the current limit and provide airflow.
Are these modules suitable for Raspberry Pi?
The Raspberry Pi requires more than 800mA so most single modules here are not enough. Use a power bank or higher current module designed for 5V devices.
Can I solder these to a PCB easily?
Yes most have through hole pins suitable for soldering. Use a fine tip iron and ensure you apply enough heat for a solid joint without damaging the module.
What if my input voltage is exactly 3.3V?
If input equals output a linear regulator passes it through while a buck may not start. Ensure your source is slightly higher than 3.3V for stable operation.
Final Thoughts on Choosing the Best 5V to 3V Voltage Regulator
We highlighted ten reliable regulators for converting 5V to 3.3V. The buck converters offer efficiency while linear types provide simplicity and low noise.
Prioritize current capacity and input range when selecting. Consider heat management for battery powered or high load scenarios.
Always verify current pricing and availability before purchase as they can change frequently. Check user reviews for any updates on quality.