10 Pack 3 Pins AMS1117-3.3
4.1Editor score
Simple 3-pin linear regulator design
Supports 4.75V to 12V input
Provides reliable 0.8A current output
In this guide
Finding the right 5V to 3V voltage regulator is crucial for powering sensitive electronics like microcontrollers and sensors without risking damage from voltage spikes or instability.
This guide compares ten highly rated regulators ranging from compact buck modules to linear LDOs, evaluating their efficiency, output current capacity, and suitability for various projects.
Each pick highlights key specs and real-world applications to help you choose the perfect regulator for your build, though prices and availability may change over time.
Top 3 Picks for Best 5V to 3V Voltage Regulator
5pcs 3.3V Buck Converter Module
4.6Editor score
Wide 4.5V to 24V input range
Stable 3.3V output up to 1.8A
Ultra compact 17.5x12x4.5mm size
3.3V Regulator 5pcs Mini Reducer
5.0Editor score
High efficiency Mini360 buck architecture
Up to 1.8A output current capacity
Low ripple under 30mV at 1.5MHz
Top 10 Best 5V to 3V Voltage Regulator in 2026 Compared
The following table provides a quick side-by-side comparison of all ten regulators featured in this guide, highlighting their input voltage ranges, maximum output currents, and form factors.
ProductsSpecificationsEditor scorePrice
Editor's Choice
5pcs 3.3V Buck Converter Module
Input: 4.5V to 24V
Output: 3.3V
Current: 1.8A max
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
Current: 0.8A max
Type: Linear Regulator
4.1Editor score
Best Premium
5PCS DC-DC Step Down/Step Up
Input: 1.8V to 5V
Output: 3.3V
Current: 100mA max
Type: Buck/Boost Converter
5.0Editor score
3.3V Regulator 5pcs Mini Reducer
Input: 4.5V to 24V
Output: 3.3V
Current: 1.8A max
Type: Mini360 Buck Module
5.0Editor score
Dorhea 7 Pack 3.3V DC-DC
Input: 4.75V to 12V
Output: 3.3V
Current: 800mA max
Type: Linear Buck Module
4.2Editor score
AMS1117-3.3 DC 4.75V-12V
Input: 4.75V to 12V
Output: 3.3V
Current: 800mA max
Type: LDO Regulator
5.0Editor score
5PCS 3.3V Mini Buck Converter Board
Input: 5V to 30V
Output: 3.3V
Current: 1.8A max
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
Current: 1.8A peak
Size: 17.5×12.3×4.3mm
10PCS 5V to 3.3V DC-DC
Input: 4.5V to 7V
Output: 3.3V
Current: 800mA max
Type: AMS1117 Buck Module
5.0Editor score
3.3V Regulator 6pcs Mini Reducer
Input: 4.5V to 24V
Output: 3.3V
Current: 1.8A max
Size: 17x11x3.6mm
4.9Editor score
1. 5pcs 3.3V Buck Converter Module – Best Overall 5V to 3V Voltage Regulator
5pcs 3.3V Buck Converter Module
Wide 4.5V to 24V input
Stable 3.3V output up to 1.8A
Low ripple under 30mV
Ultra compact 17.5x12x4.5mm
This compact buck converter module stands out as the top choice due to its exceptional input voltage range and stable output performance ideal for diverse applications.
Pros
- Excellent input voltage flexibility
- High current output capability
- Very small footprint
- Stable power delivery
- Good value 5-pack
Cons
- Requires external protection for inductive loads
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It delivers a clean 3.3V output with low ripple and supports up to 1.8A current, making it suitable for powering microcontrollers and sensors reliably.
While it requires additional protection components for inductive loads like motors, this is a minor trade-off given its overall versatility and efficiency.
If you need a reliable power solution for multiple projects, this pack offers the best balance of performance size and price for most makers.
Flexible Power Source Compatibility
The wide input range allows connection to various power supplies like 5V USB or 12V adapters without needing extra conversion.
Efficient Power Management
Switching at 1MHz to 1.5MHz ensures minimal heat generation while maintaining high efficiency compared to linear regulators.
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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
Simple 3-pin linear regulator design
Supports 4.75V to 12V input
Provides reliable 0.8A current output
Built-in overheat shutdown circuit
For budget-conscious projects needing a straightforward solution, this AMS1117-3.3 pack delivers solid performance at an unbeatable price per unit.
Pros
- Affordable price point
- Easy to solder and use
- Wide compatibility with MCUs
- Overheat protection included
- 10-pack quantity
Cons
- Lower efficiency than switching regulators
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It offers a simple 3-pin interface that works seamlessly with common development boards and supports up to 0.8A current reliably.
Although linear regulators are less efficient and generate more heat than switching modules, this is acceptable for low-power applications.
This option is perfect for students or hobbyists building many simple circuits where cost and simplicity are the main priorities.
Universal MCU Compatibility
Designed to work with popular boards like Arduino UNO and STM32 ensuring easy integration into existing projects.
Built-in Safety Features
The overheat shutdown circuit protects your project from damage if the regulator gets too hot during prolonged use.
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3. 3.3V Regulator 5pcs Mini Reducer – Best Premium 5V to 3V Voltage Regulator
3.3V Regulator 5pcs Mini Reducer
High efficiency Mini360 buck architecture
Up to 1.8A output current capacity
Low ripple under 30mV at 1.5MHz
Compact 17.5×12.3×4.3mm size
This Mini360 buck converter delivers premium performance with extremely low ripple and high efficiency ideal for sensitive electronics and high-demand circuits.
Pros
- Top-rated performance
- Very low output ripple
- High current capacity
- Ultra compact design
- Wide input range
Cons
- Slightly higher cost than linear options
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It supports up to 1.8A current and operates with a switching frequency up to 1.5MHz ensuring clean power even under heavy loads.
The only downside is a modest price premium compared to basic linear regulators but the reliability justifies the cost for critical projects.
Choose this module when you need the highest quality power regulation for professional-grade embedded systems or high-performance microcontrollers.
Superior Power Quality
The low ripple ensures that sensitive components receive stable voltage without noise that could disrupt operation or cause errors.
Compact and Rugged
Despite its tiny size, this module is built to handle significant current and fits easily into tight PCB layouts.
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4. 5PCS DC-DC Step Down/Step Up – Best 5V to 3V Voltage Regulator
5PCS DC-DC Step Down/Step Up
Input: 1.8V to 5V range
Output: 3.3V fixed
Type: Buck and Boost converter
Current: 100mA max output
This unique converter offers both step up and step down functionality making it ideal for battery-powered projects where input voltage varies.
Pros
- Step up and down capability
- Very versatile input range
- High perfect ratings
- Ideal for battery power
- Compact design
Cons
- Lower current output capacity
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It handles inputs from 1.8V to 5V and outputs a stable 3.3V ensuring your device runs smoothly even as battery levels drop.
The limitation is a lower current limit of 100mA which restricts it to low-power applications like sensors or simple microcontrollers.
Perfect for portable wearables or battery-operated gadgets where maintaining constant voltage across varying input levels is essential.
Versatile Battery Integration
Works seamlessly with single-cell or multi-cell batteries adjusting output as voltage fluctuates during discharge cycles.
Efficient Low Power Use
Designed for minimal power consumption ensuring your battery lasts longer in low-demand scenarios.
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5. Dorhea 7 Pack 3.3V DC-DC – Best 5V to 3V Voltage Regulator
Dorhea 7 Pack 3.3V DC-DC
3-pin easy connect design
4.75V to 12V input support
Fixed 3.3V output voltage
0.8A current output capacity
The Dorhea pack provides an affordable and easy-to-use solution for common power needs with a simple 3-pin interface for quick setup.
Pros
- Easy connection interface
- Affordable 7-pack value
- Reliable AMS1117 chip
- Overheat protection feature
- Suitable for many MCUs
Cons
- Moderate efficiency rating
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Using the proven AMS1117 regulator chip it delivers stable power to microcontrollers and other electronics up to 0.8A current.
While efficiency is moderate compared to switching regulators it is sufficient for most hobbyist and low-power industrial applications.
This pack is ideal for prototyping multiple circuits where simplicity and low cost outweigh high efficiency requirements.
Simplified Prototyping
The 3-pin layout reduces wiring complexity and saves space on your breadboard or PCB design.
Consistent Power Supply
Ensures your project receives constant voltage even if the input source fluctuates within the supported range.
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6. AMS1117-3.3 DC 4.75V-12V – Best 5V to 3V Voltage Regulator
AMS1117-3.3 DC 4.75V-12V
15-piece bulk quantity pack
Low voltage drop operation
Built-in overheat protection
Simple plug and play design
With fifteen units in one package this pack offers fantastic value for larger projects or teams needing multiple regulators consistently.
Pros
- Excellent bulk pricing
- High user ratings
- Low voltage difference
- Wide application range
- Reliable performance
Cons
- Linear design heat generation
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The low voltage drop feature makes it particularly efficient for battery-powered scenarios where conserving every volt matters.
Its simple plug and play design means no complex wiring or additional components are needed for basic applications.
Choose this option when you need a high quantity of reliable regulators for production or large-scale educational setups.
Bulk Value Advantage
Buying in bulk reduces per-unit cost significantly ideal for batch production or classroom kits.
Battery Power Optimization
Minimizes power loss during voltage conversion extending battery life in portable devices.
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7. 5PCS 3.3V Mini Buck Converter Board – Best 5V to 3V Voltage Regulator
5PCS 3.3V Mini Buck Converter Board
5V to 30V input range
Up to 1.8A output current
Ultra compact PCB dimensions
Low ripple output quality
This mini buck board handles a wide input range up to 30V making it versatile for automotive or industrial 24V systems.
Pros
- Wide input voltage tolerance
- High current output support
- Small board size
- Affordable 5-pack
Cons
- Lower user rating average
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It supports high current output up to 1.8A which is excellent for powering multiple devices simultaneously without overload.
Despite its capabilities some users report mixed reviews likely due to inconsistent quality control or packaging issues.
Use this when your input voltage exceeds standard ranges and you need a compact solution for robust applications.
High Voltage Tolerance
Safe for use with 12V or 24V power sources where standard 5V regulators would fail.
Space Efficient Design
Extremely small footprint fits into tight enclosures where larger modules cannot be installed.
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8. 5pcs 3.3V DC-DC Buck Converter – Best 5V to 3V Voltage Regulator
5pcs 3.3V DC-DC Buck Converter
4.5V to 30V input range
1.8A peak output current
Compact 17.5×12.3×4.3mm
Ready for Arduino integration
This regulator features a broad input range suitable for batteries vehicle power or solar panels ensuring reliable performance across various sources.
Pros
- Wide input range support
- Compact dimensions
- High peak current
- Low ripple output
Cons
- No specific rating available
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Its compact size and high peak current capability make it ideal for drones or wearables requiring efficient power management.
Users should verify compatibility with specific load requirements before deployment to avoid potential issues with peak demands.
It is a versatile choice for projects needing flexibility in input voltage without sacrificing output stability.
Vehicle Power Compatible
Designed to handle fluctuations in car or truck electrical systems safely.
Clean Power Output
Provides minimal ripple to protect sensitive electronics from power noise.
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9. 10PCS 5V to 3.3V DC-DC – Best 5V to 3V Voltage Regulator
10PCS 5V to 3.3V DC-DC
4.5V to 7V input range
Fixed 3.3V output
0.8A current limit
AMS1117 based module
This pack offers ten reliable modules optimized for 5V input sources commonly found in USB and development boards.
Pros
- High user ratings
- 10-unit pack value
- Simple input range
- Reliable current regulation
Cons
- Limited voltage compatibility
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It is designed specifically for low voltage steps and provides consistent 3.3V power for digital logic components.
The limited input range makes it less versatile for higher voltage applications but perfect for standard electronics.
Ideal for makers who already have standard 5V power supplies and need multiple regulators for various small projects.
USB Power Friendly
Optimized for the typical 5V output from USB ports without requiring additional adapters.
Consistent Current
Protects your project from current spikes with a solid 800mA limit.
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10. 3.3V Regulator 6pcs Mini Reducer – Best 5V to 3V Voltage Regulator
3.3V Regulator 6pcs Mini Reducer
Ultra small 17x11x3.6mm size
4.5V to 24V input
Up to 1.8A output current
Low ripple output quality
This Mini360 module is among the smallest options available while still delivering high current output and stable power.
Pros
- Very compact dimensions
- High current capacity
- Excellent user rating
- Wide input range
Cons
- Inductive load protection needed
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It works well with aircraft models and robotics where space is tight and reliable voltage regulation is critical.
Adding protection for inductive loads ensures longevity when controlling motors or servos with this module.
Highly recommended for projects needing minimal size without compromising on power delivery performance.
Minimal Footprint
Fits into the tightest spaces for wearable or aerospace applications.
High Performance Density
Delivers impressive current capacity from a very small physical package.
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Buying Guide – How to Choose the Best 5V to 3V Voltage Regulator
Selecting the right regulator involves considering your input voltage, required output current, efficiency needs, and physical size constraints.
Input Voltage Range
Ensure the regulator accepts your power source voltage comfortably without risking overload or dropout conditions during operation.
Wider input ranges offer flexibility for battery or multi-voltage sources.
Output Current Capacity
Choose a regulator that supports the maximum current your load might draw to prevent overheating or shutdowns.
Always leave a safety margin above your estimated peak current.
Efficiency vs Heat
Switching regulators offer high efficiency and low heat ideal for battery or high-power use compared to linear regulators.
Linear regulators are simpler but waste more energy as heat especially with large voltage drops.
Output Ripple and Noise
Sensitive electronics like audio or RF components require low ripple regulators to avoid interference or noise.
Look for specifications indicating ripple below 30mV for clean power.
Physical Size and Mounting
Consider the module dimensions and mounting options to fit your PCB or enclosure space effectively.
Smaller modules save space but may have higher thermal resistance and lower current limits.
Protection Features
Built-in protection like overcurrent and overheat shutdowns safeguard your project from damage during faults.
These features add reliability and reduce risk of costly component failures.
Application Specifics
Identify whether you need step up, step down, or both based on your input and output voltage requirements.
Matching the converter type ensures stable operation across battery discharge cycles.
Cost and Quantity
Multi-pack options often lower the unit cost significantly for bulk projects or prototyping needs.
Balance your budget with necessary quality features to avoid overspending or underperforming parts.
How to Use and Care for Your 5V to 3V Voltage Regulator
Connect the input pins securely to your power source ensuring polarity is correct to prevent damage or short circuits.
Add appropriate capacitors on both input and output as recommended to stabilize voltage and reduce noise.
Monitor the module temperature during high current use and provide ventilation or heatsinking if necessary to maintain longevity.
Frequently Asked Questions
What is the difference between buck and linear regulators?
Buck regulators are switching devices that offer high efficiency and low heat by rapidly switching power on and off. Linear regulators are simpler and cheaper but dissipate excess voltage as heat making them less efficient for large voltage drops.
Can I use a 5V regulator for 3.3V output?
Only if the regulator has a fixed or adjustable 3.3V output setting. Standard 5V regulators will output 5V which can damage 3.3V devices. Always verify the output voltage rating before connecting.
Do I need capacitors with voltage regulators?
Yes most regulators require input and output capacitors to stabilize voltage and prevent oscillations. Refer to the datasheet for recommended values to ensure reliable operation.
Why is my regulator getting hot?
Excess heat usually comes from high current draw or low efficiency especially with linear regulators under large voltage differences. Ensure proper heat dissipation and consider switching regulators for high power.
What does output ripple mean?
Output ripple refers to the small voltage fluctuations on the output line caused by switching or noise. Low ripple ensures cleaner power for sensitive components like microcontrollers and sensors.
Are these regulators suitable for battery-powered projects?
Yes especially switching regulators are ideal for battery power due to high efficiency. Linear regulators work for low-power apps but drain batteries faster due to heat dissipation.
Can I use these with Arduino or ESP32?
Absolutely these regulators are designed to power common MCUs like Arduino ESP32 and STM32 which operate at 3.3V Ensure current limits match your board requirements.
How do I protect against inductive loads?
Add external diodes or capacitors when connecting motors or relays to suppress voltage spikes generated by inductive loads that could damage the regulator.
Final Thoughts on Choosing the Best 5V to 3V Voltage Regulator
Whether you need efficiency high current or compact size this guide covers options for every application from hobby to professional use.
Prioritize safety features and current ratings to protect your project and ensure long-term reliable performance across various inputs.
Always verify your current pricing and availability since costs may vary depending on the supplier and market conditions today.