AMS1117-3.3 UMW

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The AMS1117-3.3 UMW is a state-of-the-art low dropout voltage regulator designed to cater to a broad spectrum of applications requiring a reliable power solution. Engineered for stability and efficiency, this compact component ensures your devices operate at peak performance, enhancing both longevity and reliability.



The AMS1117-3.3 is a high-performance, low dropout (LDO) voltage regulator, optimized for reliability and efficiency in a wide range of applications. Designed with the latest semiconductor technology, it offers a stable and precise 3.3V output, ideal for powering sensitive electronic devices. Below are its standout features:

Precision Voltage Regulation

  • Stable 3.3V Output: Delivers a constant 3.3V, essential for sensitive electronics, ensuring optimal performance and stability.
  • High Accuracy: Features tight output tolerance, ensuring the output voltage remains precise under various load conditions.

Low Dropout Performance

  • Low Dropout Voltage: Operates effectively with a very small input-to-output differential, minimizing power loss and improving efficiency, which is critical for battery-powered applications.

High Efficiency

  • Reduced Power Dissipation: Its efficient design leads to lower heat generation, extending the life of the device and reducing the need for additional cooling.

Versatile and Robust Design

  • Wide Input Voltage Range: Accommodates a broad range of input voltages, making it suitable for diverse applications.
  • Thermal Overload Protection: Incorporates built-in thermal shutdown to protect the device and your application from damage due to overheating.
  • Current Limiting: Features output current limiting to safeguard the regulator and downstream components from damage due to overcurrent conditions.

Compact and Flexible Packaging

  • Small Footprint: The SOT-223 package is compact, saving space on PCBs and making it ideal for high-density installations.
  • Ease of Integration: Designed for straightforward incorporation into various circuit designs, requiring minimal external components.



The AMS1117-3.3 is a versatile low dropout voltage regulator that finds applications in a variety of electronic devices and systems due to its reliable performance, stable 3.3V output, and efficiency. Here’s a closer look at its applications across different sectors:

Consumer Electronics

  • Mobile Devices: Used in smartphones, tablets, and other portable gadgets to provide stable power, enhancing battery life and device reliability.
  • Personal Computers: Integral in motherboards and peripheral devices to ensure smooth operation and power stability.
  • Audio/Video Equipment: Powers media players, speakers, and other A/V devices, ensuring clear and consistent performance.

Industrial and Automation

  • Sensors and Control Systems: Regulates power supply to sensors and actuators in industrial automation systems, maintaining accuracy and reliability.
  • Power Supplies: Utilized in the power management circuits of industrial-grade power supplies to ensure stable output for critical operations.
  • LED Lighting: Powers LED drivers for industrial lighting solutions, ensuring consistent brightness and longevity.


  • Network Devices: Found in routers, switches, and modems to regulate power and ensure uninterrupted network connectivity.
  • Wireless Communication Equipment: Powers devices like RF transceivers and base stations for stable wireless communications.

Automotive Electronics

  • Dashboard Instruments: Regulates power for instruments and displays, ensuring accurate readings and functionality.
  • Entertainment Systems: Powers audio and video systems, providing stable operation for in-car entertainment.
  • Engine Control Units (ECUs): Used in the power regulation circuits of ECUs for reliable engine performance and diagnostics.

Medical Devices

  • Portable Medical Equipment: Powers handheld medical devices, ensuring reliable performance for diagnostics and patient monitoring.
  • Laboratory Instruments: Regulates power in lab equipment, maintaining accuracy in measurements and tests.

Energy Systems

  • Solar Power Converters: Utilized in the power regulation circuits of solar converters, ensuring efficient energy conversion and stable output.
  • Battery Management Systems: Regulates charging circuits in battery management systems for safer and more efficient battery charging.

The AMS1117-3.3 UMW’s ability to provide a stable and reliable 3.3V output makes it an ideal component for these applications, ensuring the efficient operation of a wide range of electronic devices and systems.



The AMS1117-3.3, a popular low dropout (LDO) voltage regulator, offers a range of advantages for various electronic applications due to its design and performance characteristics. Here are some of the key advantages:

High Efficiency:

  • Low Dropout Voltage: The AMS1117-3.3 UMW operates efficiently with a very low dropout voltage, which means it can regulate voltage close to the input voltage while minimizing power loss. This feature is particularly beneficial in battery-powered devices, where maximizing battery life is crucial.

Versatility and Compatibility:

  • Fixed 3.3V Output: The regulator provides a stable 3.3V output, a common and often necessary voltage for digital circuits, microcontrollers, and other sensitive electronic components.
  • Wide Input Voltage Range: It supports a broad range of input voltages, making it versatile for different power supply scenarios, from batteries to AC adapters.

Reliability and Performance:

  • Thermal Overload Protection: The device includes built-in thermal overload protection that shuts down the regulator to prevent damage if the temperature exceeds safe operating limits.
  • Current Limiting: Inbuilt current limiting protects the regulator and the downstream components from damage due to excessive current draw, enhancing the circuit’s overall safety and longevity.
  • Low Noise: This LDO regulator offers low output noise, which is crucial for noise-sensitive applications such as audio devices and precision measurement instruments.

Ease of Use and Integration:

  • Minimal External Components Required: The AMS1117-3.3 UMW can function effectively with only two external capacitors (input and output), simplifying circuit design and reducing overall component count.
  • Standard Package and Footprint: Its availability in a SOT-223 package makes it easy to integrate into a wide variety of PCB designs, including those with space constraints.


  • Affordability: The AMS1117 series, including the AMS1117-3.3 UMW, is known for providing reliable voltage regulation at a low cost, making it an attractive choice for projects with tight budgets.

Broad Application Range:

Due to these advantages, the AMS1117-3.3 UMW is suitable for a wide array of applications, from consumer electronics and portable devices to industrial controls and automotive systems, where stable voltage, reliability, and efficiency are paramount.

In summary, the AMS1117-3.3 UMW combines efficiency, reliability, and versatility with ease of use, making it an excellent choice for designers and engineers looking for a dependable voltage regulation solution.



Product Attribute Attribute Value
Product Category: LDO Voltage Regulators
Manufacturer: UMW
Packaging: Tape & Reel (TR)

Cut Tape (CT)


Part Status: Active
Output Configuration: Positive
Output Type: Fixed
Number of Regulators: 1
Voltage – Input (Max): 12V
Voltage – Output (Min/Fixed): 3.3V
Voltage – Output (Max):
Voltage Dropout (Max): 1.3V @ 1A
Current – Output: 1A
Current – Quiescent (Iq): 10 mA
PSRR: 75dB (120Hz)
Control Features: Current Limit
Protection Features: Over Temperature
Operating Temperature: -40°C ~ 125°C (TJ)
Mounting Type: Surface Mount
Package / Case: TO-261-4, TO-261AA
Supplier Device Package: SOT-223-3L



AMS1117-3.3 UMW Datasheet


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