5pcs 3.3V Buck Converter Module
4.6Editor score
Wide 4.5V to 24V input range
Up to 1.8A output current
Ultra small 17.5x12x4.5mm size
In this guide
Finding the right voltage regulator is essential for powering microcontrollers and sensors safely. These devices step down higher voltages to stable levels needed for sensitive electronics.
We evaluated ten highly rated modules based on output stability, current capacity, and physical size. Our analysis covers both linear and switching regulator types for various needs.
Each pick highlights key specs and use cases to help you choose quickly. Note that product availability and pricing may change over time, so check current details.
Top 3 Picks for Best 5V to 3V Voltage Regulator
AMS1117-3.3 15pcs Pack
5.0Editor score
Fixed 3.3V output with 2% accuracy
Low dropout 1V input output difference
Built in overheat protection
3.3V Regulator 6pcs Mini Reducer
4.9Editor score
MP1584EN based switching design
1.8A peak current output
Compact 17x11x3.6mm footprint
Top 10 Best 5V to 3V Voltage Regulator in 2026 Compared
The following table provides a side by side comparison of all ten voltage regulator options. It highlights their input ranges, output capabilities, and key form factors.
ProductsSpecificationsEditor scorePrice
Best Budget
5pcs 3.3V Buck Converter Module
Input 4.5V to 24V
Output 3.3V
Max Current 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
Max Current 0.8A
Linear Regulator Type
4.1Editor score
Best Premium
5PCS DC-DC Step Down/Step Up Converter
Input 1.8V to 5V
Output 3.3V
Max Current 100mA
Buck Boost Converter
5.0Editor score
3.3V Regulator 5pcs Mini Reducer
Input 4.5V to 24V
Output 3.3V
Max Current 1.5A
Size 17.5×12.3×4.3mm
5.0Editor score
Dorhea 7 Pack 3.3V DC-DC Buck
Input 4.75V to 12V
Output 3.3V
Max Current 0.8A
Linear Regulator Type
4.2Editor score
AMS1117-3.3 DC 4.75V-12V
Input 4.75V to 12V
Output 3.3V
Max Current 0.8A
Accuracy Plus Min 2%
5.0Editor score
5PCS 3.3V Mini Buck Converter Board
Input 5V to 30V
Output 3.3V
Max Current 1.8A
Size 0.67×0.24×0.16 inches
3.4Editor score
5pcs 3.3V DC-DC Buck Converter
Input 4.5V to 30V
Output 3.3V
Max Current 1.8A
Size 17.5×12.3×4.3mm
10PCS 5V to 3.3V DC-DC Step Down
Input 4.5V to 7V
Output 3.3V
Max Current 0.8A
Linear Regulator Type
5.0Editor score
3.3V Regulator 6pcs Mini Reducer
Input 4.5V to 24V
Output 3.3V
Max Current 1.8A
Size 17x11x3.6mm
4.9Editor score
1. 5pcs 3.3V Buck Converter Module – Best Overall Value
5pcs 3.3V Buck Converter Module
Input 4.5V to 24V
Output 3.3V
Max Current 1.8A
Frequency 1MHz to 1.5MHz
This 5 pack buck converter module offers excellent value for hobbyists. It delivers stable 3.3V from a wide input range with strong 1.8A output capability.
Pros
- Wide input voltage range
- High current output capability
- Compact footprint for tight spaces
- Low output ripple
- Great value 5 pack price
Cons
- Needs diode for inductive loads
- No protection components included
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Its ultra small 17.5x12x4.5mm size fits easily into embedded projects. The low ripple and high switching frequency ensure clean power for sensitive microcontrollers.
Users must add a diode and capacitor when driving motors or servos to prevent damage. The modules do not include these external components.
Choose this pack if you need multiple units for prototyping. It is ideal for DIY makers expanding projects or testing different circuits.
Wide Input Flexibility
Works with 5V, 9V, 12V, and 24V supplies for versatile applications.
Compact Design
Small dimensions allow installation in narrow spaces for portable devices.
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2. AMS1117-3.3 15pcs Pack – Best Linear Regulator
AMS1117-3.3 15pcs Pack
Input 4.75V to 12V
Output 3.3V
Max Current 0.8A
Linear Regulator Type
This 15 pack of AMS1117-3.3 linear regulators ensures stable power for microcontrollers. It maintains precise 3.3V output with minimal fluctuation under load changes.
Pros
- High accuracy output
- Low dropout voltage
- Built in safety protections
- Easy 3 pin connection
- Large 15 pack quantity
Cons
- Lower current than switching modules
- Limited input voltage range
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The low dropout design improves efficiency in battery powered scenarios. Built in overheat and overcurrent protection prevents chip damage during abnormal conditions.
It supports less current than switching options at 800mA maximum. The input range is limited to 12V which suits common logic levels.
This pack suits projects needing reliable linear regulation. It is perfect for Arduino, STM32, and low power MCU development boards.
Efficient Battery Power
Low dropout voltage minimizes power consumption for portable devices.
Plug and Play Setup
Simple VIN, OUT, GND pins simplify circuit connections.
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3. 3.3V Regulator 6pcs Mini Reducer – Best Compact Premium
3.3V Regulator 6pcs Mini Reducer
Input 4.5V to 24V
Output 3.3V
Max Current 1.8A
MP1584EN Based
This premium 6 pack features MP1584EN based modules for high performance. It delivers up to 1.8A output with very low ripple for sensitive electronics.
Pros
- High current output
- Very small size
- Low ripple output
- High switching frequency
- MP1584EN reliability
Cons
- Needs protection for inductive loads
- Slightly higher price point
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The tiny 17x11x3.6mm size is the smallest available. High frequency switching ensures efficiency and minimal heat generation during operation.
Like other buck converters, it requires external components for inductive loads. This adds minor complexity but ensures circuit safety and stability.
Select this for high power needs in tight spaces. It is ideal for aircraft models, drones, and compact embedded systems.
Maximum Space Savings
Smallest footprint allows integration in very compact PCB layouts.
High Performance Core
MP1584EN chip ensures stable switching and high efficiency.
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4. 10 Pack AMS1117-3.3 – Best for SCM Design
5 Pack 3 Pins AMS1117-3.3
Input 4.75V to 12V
Output 3.3V
Max Current 0.8A
Linear Regulator Type
This 10 pack offers reliable linear regulation for SCM projects. It supports 5V supplies and provides constant 3.3V power for microcontrollers.
Pros
- Dual panel design
- Easy pin connections
- Wide MCU compatibility
- Overheat shutdown circuit
- 10 pack quantity
Cons
- Lower current than switching types
- Input range limited to 12V
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The simple dual panel design and 2 pin row pins make connection easy. It suits Arduino, STM32, and FPGA programmable logic systems well.
The 0.8A limit restricts high current uses. Users must respect this limit to avoid thermal shutdowns or component damage.
This choice fits projects needing simple reliable regulation. It is suitable for battery chargers and low power instruments.
Simple Connections
2 pin single row pins ease connection to MCUs.
Safety Features
Overheat shutdown prevents damage from overheating.
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5. 5PCS Step Up/Down Converter – Best for Boost Needs
5PCS DC-DC Step Up/Down
Input 1.8V to 5V
Output 3.3V
Max Current 100mA
Boost Buck Converter
This unique converter handles both step up and step down scenarios. It accepts inputs as low as 1.8V and stabilizes output to 3.3V.
Pros
- Steps up or down voltage
- Supports 1.8V input
- Stable 3.3V output
- Good for low voltage sources
- Perfect5 pack quantity
Cons
- Very low current limit
- Not for high power devices
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Its 100mA limit makes it ideal for low power sensors. It works well with coin cells or battery sources below 3.3V.
The low current rating is not for general power. Users should avoid driving high loads like motors or Wi-Fi chips.
Choose this for specialized low voltage needs. It is useful for portable devices requiring step up conversion from batteries.
Flexible Voltage Handling
Operates as buck or boost depending on input voltage level.
Low Power Friendly
Ideal for sensors running on single coin cell batteries.
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6. Dorhea 7 Pack – Best for Low Power MCUs
Dorhea 7 Pack 3.3V DC-DC Buck
Input 4.75V to 12V
Output 3.3V
Max Current 0.8A
Linear Regulator Type
Dorhea offers a solid 7 pack of linear buck modules. These provide constant power for SCM projects needing 3.3V supplies.
Pros
- 7 pack convenience
- Simple 3 pin design
- Low power MCU support
- Overheat protection
- Suitable for SCM
Cons
- Limited to 800mA
- Input limited to 12V
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The 3 pin design simplifies soldering and connections. Protection circuits guard against overload and temperature issues during use.
The 800mA limit is strict and cannot be exceeded. Users should verify load requirements before applying power to devices.
This pack suits low power MCU systems. It is good for ARM chips and programmable logic systems.
Simple Power Supply
3 pin design streamlines connection to development boards.
Reliable Protection
Built-in protection prevents damage from overloads.
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7. 5PCS Mini Buck Converter – Best Compact 5-30V
5PCS 3.3V Mini Buck Converter
Input 5V to 30V
Output 3.3V
Max Current 1.8A
Small PCB Board
This board accepts inputs up to 30V for diverse applications. It delivers up to 1.8A output with a compact black PCB.
Pros
- Wide input range to 30V
- High 1.8A output
- Small board size
- Reverse polarity protection
- 5 pack quantity
Cons
- Lower rating than others
- Limited stability at high current
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Reverse polarity marks help prevent incorrect wiring. The small size fits in various places requiring high current conversion.
Lower rating suggests potential variance in performance. Users should monitor heat when running near the 1.8A maximum.
It suits applications needing higher input voltages. Ideal for solar panels or vehicle power sources.
High Voltage Input
Supports inputs up to 30V for versatile power sources.
Compact Footprint
Tiny board allows installation in tight enclosures.
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8. 5pcs 4.5V-30V Buck Converter – Best for IoT
5pcs 3.3V DC-DC Buck Converter
Input 4.5V to 30V
Output 3.3V
Max Current 1.8A
Size 17.5×12.3×4.3mm
This converter handles 4.5V to 30V inputs for broad applications. It suits IoT devices and vehicle power systems with 1.8A output.
Pros
- Wide 30V input
- High current output
- Ready for Arduino
- Clean low ripple
- Tested before shipping
Cons
- No rating data provided
- Needs external components for motors
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Clean power and low ripple protect sensitive sensors. Units are tested before shipping to ensure reliability for prototyping.
External capacitors may be needed for inductive loads. This adds to the build process but ensures circuit stability.
Select this for IoT and vehicle projects. It works well with ESP32 and Raspberry Pi systems.
Wide Input Range
Supports various batteries and solar panel inputs up to 30V.
Pre-Tested Reliability
Units undergo testing before shipping to ensure functionality.
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9. 10PCS AMS1117 800MA – Best for 7V Input
10PCS 5V to 3.3V DC-DC
Input 4.5V to 7V
Output 3.3V
Max Current 0.8A
Linear Regulator Type
This pack offers ten modules for multi circuit needs. It handles inputs from 4.5V to 7V and outputs stable 3.3V.
Pros
- Large 10 pack
- Suitable for 5V systems
- Clear input limits
- Low cost option
- Automatic adjustable
Cons
- Input limited to 7V
- Strict 800mA limit
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The strict 800mA limit ensures safety if observed. Users must not exceed operating voltage to prevent damage easily.
Input range is tighter than many buck options. This limits use to lower voltage battery or USB sources.
Ideal for projects with limited supply voltage. It is perfect for small sensor arrays and 5V powered systems.
Limited Input Range
Designed for supplies under 7V to ensure safe operation.
Strict Load Limits
Respect the 800mA limit to avoid overheating.
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10. 3.3V Regulator 5pcs Mini Reducer – Best for 30V
3.3V Regulator 5pcs Mini Reducer
Input 4.5V to 24V
Output 3.3V
Max Current 1.5A
Size 17.5×12.3×4.3mm
This mini360 board supports inputs up to 24V for many needs. It outputs 3.3V with up to 1.5A current for robust projects.
Pros
- High current 1.5A
- Wide input to 24V
- Low ripple under 30mV
- Mini360 size
- 5 pack convenience
Cons
- Needs Zener for inductive loads
- Switching frequency varies
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Low ripple ensures clean power for sensitive chips. Its tiny size fits narrow spaces for portable or embedded applications.
Zener diodes are recommended when using motors. This protects the rear stage circuit from large ripples generated.
Choose this for compact high current needs. It is excellent for 5V to 24V DC power systems.
Robust Power Delivery
1.5A output handles demanding loads better than linear types.
Miniature Form
Small dimensions allow installation in tight PCB layouts.
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Buying Guide – How to Choose the Best 5V to 3V Voltage Regulator
Selecting the right regulator requires checking voltage ranges, current needs, and form factor. This guide breaks down the critical factors to consider.
Input Voltage Range
Always verify the input range covers your power source. Some modules handle 5V to 30V while others stop at 12V or 7V.
Check the input range matches your battery or supply output.
Output Current Capability
Your load determines the required current. Linear regulators often cap at 800mA while switching types reach 1.8A or more.
Ensure the regulator supports your device maximum peak current needs.
Regulator Type
Switching regulators offer efficiency and higher current. Linear regulators provide simpler low noise power for sensitive circuits.
Pick switching for efficiency and linear for simplicity.
Physical Size and Mounting
Compact boards fit portable devices better. Check dimensions and pin spacing for soldering ease in tight enclosures.
Verify the board size fits your available space.
Protection Features
Built in thermal and overload protection prevents damage. Modules without these require external components for safety.
Prioritize regulators with overheat protection.
Number of Units
Buying packs offers better value than single units. Consider how many projects you need power for when ordering.
Choose a pack size that fits your prototyping needs.
Output Ripple and Noise
Low ripple ensures stable operation for sensors. High quality modules keep output clean to prevent interference issues.
Look for ripple specs under 30mV.
Application Specifics
Inductive loads like motors need extra protection. Always check if your module works with your specific device type.
Add diodes if driving motors or servos.
How to Use and Care for Your 5V to 3V Voltage Regulator
Connect the input pins to your power source ensuring correct polarity. Most modules mark VIN and GND clearly for safe wiring.
Attach a small capacitor to the output if driving inductive loads. This smooths ripples and protects downstream components from spikes.
Ensure adequate airflow if running at high current. Avoid covering the module in tight enclosures to prevent overheating.
Frequently Asked Questions
Can I use a 5V to 3V regulator with 12V input?
Yes if the regulator supports up to 24V. Always check the input range before connecting to ensure safe operation with higher voltages.
Do I need heat sinks for these modules?
For current under 1A usually not. High loads may require airflow but compact modules often dissipate heat well without extra heat sinks.
What is the difference between linear and switching regulators?
Linear regulators are simpler but less efficient. Switching types provide higher current and better battery life for power intensive projects.
Why add a capacitor for motor loads?
Motors generate back EMF and ripples. A capacitor and diode protect the regulator from sudden voltage spikes during operation.
Can these power a Raspberry Pi?
Only if current needs stay under the limit. Standard Pi needs more current so check requirements before connecting directly.
Are these suitable for battery powered projects?
Switching types are best for efficiency. Linear regulators work but drain batteries faster due to higher internal voltage drops.
What if the output voltage is unstable?
Check input stability and capacitor values. Ensure your load is within the current rating to maintain consistent output performance.
Final Thoughts on Choosing the Best 5V to 3V Voltage Regulator
Our top picks cover diverse needs from budget linear options to premium compact buck converters. Each offers stable 3.3V output for reliable project power.
Prioritize current capacity and input range for your use case. Select packs for prototyping and verify protection features for safety.
Always check current pricing and availability as stock changes. Verify specs match your device requirements before finalizing your order.