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About
The AMS1117-3.3 UMW is a high-performance, low-dropout (LDO) linear voltage regulator designed to provide a fixed 3.3V output voltage with a maximum output current of 1A. It is widely used in electronic circuits to deliver a stable and reliable power supply for microcontrollers, sensors, and other low-power devices. The AMS1117-3.3 UMW is known for its low dropout voltage, high accuracy, and robust performance, making it suitable for a wide range of applications, including embedded systems, battery-powered devices, and IoT modules.
This regulator is part of the AMS1117 series, which is manufactured by Advanced Monolithic Systems (AMS) and is available in various packages, including SOT-223, TO-252, and TO-220, to accommodate different design requirements. The “UMW” designation indicates a specific variant or manufacturer, but the AMS1117-3.3 is a generic part produced by multiple manufacturers.
Applications
- Microcontroller Power Supply: Provides a stable 3.3V supply for microcontrollers like Arduino, ESP8266, ESP32, STM32, etc.
- Sensor Modules: Powers sensors and modules that require a 3.3V supply.
- Battery-Powered Devices: Ideal for portable and battery-operated devices due to its low dropout voltage and low quiescent current.
- Embedded Systems: Used in embedded systems, IoT devices, and industrial control systems.
- Consumer Electronics: Suitable for powering low-power components in consumer electronics.
Advantages
The AMS1117-3.3 UMW is a highly versatile and reliable low-dropout (LDO) linear voltage regulator that offers numerous advantages, making it a popular choice for a wide range of electronic applications. Below is a detailed list of its key advantages:
1. High Efficiency:
- Low Dropout Voltage: The AMS1117-3.3 UMW has a low dropout voltage of 1.1V (typical) at 1A load, meaning it can maintain a stable 3.3V output even when the input voltage is as low as 4.4V. This makes it highly efficient, especially in battery-powered applications where the input voltage may be close to the output voltage.
2. Stable and Accurate Output:
- Fixed 3.3V Output: The regulator provides a fixed 3.3V output voltage with ±1% accuracy, ensuring a stable and precise power supply for sensitive electronic components like microcontrollers, sensors, and ICs.
- Excellent Line and Load Regulation: With 0.2% line regulation and 0.4% load regulation, the AMS1117-3.3 UMW delivers a consistent output voltage even under varying input voltages and load conditions.
3. High Output Current:
- Up to 1A Output Current: The AMS1117-3.3 UMW can supply up to 1A of continuous current, making it suitable for powering a wide range of devices, including microcontrollers, sensors, and small motors.
4. Robust Protection Features:
- Thermal Overload Protection: The built-in thermal shutdown feature protects the regulator from damage due to excessive heat, enhancing its reliability in high-temperature environments.
- Short-Circuit Protection: The regulator is designed to withstand short-circuit conditions, safeguarding both the regulator and the connected components.
5. Wide Input Voltage Range:
- 4.4V to 15V Input Range: The AMS1117-3.3 UMW can accept input voltages ranging from 4.4V to 15V, making it compatible with a variety of power sources, including batteries, wall adapters, and DC power supplies.
6. Low Quiescent Current:
- 5mA Quiescent Current: The regulator has a low quiescent current, making it suitable for battery-powered applications where power efficiency is critical.
7. Compact and Versatile Packaging:
- Multiple Package Options: The AMS1117-3.3 UMW is available in SOT-223, TO-252, and TO-220 packages, providing flexibility for different PCB designs and space constraints.
- SOT-223: Compact surface-mount package, ideal for space-constrained designs.
- TO-252: Slightly larger than SOT-223, with better thermal performance.
- TO-220: Through-hole package with excellent thermal dissipation, suitable for high-power applications.
8. Cost-Effective Solution:
- The AMS1117-3.3 UMW is an affordable and cost-effective solution for voltage regulation in low-power applications, making it a popular choice among hobbyists and engineers.
9. Easy to Use:
- Minimal External Components: The regulator requires only input and output capacitors (10µF and 22µF, respectively) for stable operation, simplifying the design process.
- Simple Circuit Design: The typical application circuit is straightforward, making it easy to integrate into existing designs.
10. Wide Operating Temperature Range:
- -40°C to +125°C: The AMS1117-3.3 UMW operates reliably over a wide temperature range, making it suitable for use in harsh environments, including industrial and automotive applications.
11. Excellent Ripple Rejection:
- 60dB Ripple Rejection: The regulator effectively filters out input voltage noise, ensuring a clean and stable output voltage, which is critical for noise-sensitive applications.
12. Thermal Performance:
- The AMS1117-3.3 UMW has good thermal performance, especially in the TO-220 package, which can be paired with a heatsink for high-current applications. For SOT-223 and TO-252 packages, proper PCB layout with sufficient copper area ensures effective heat dissipation.
13. Compatibility with Alternatives:
- The AMS1117-3.3 UMW is compatible with other popular LDO regulators like the LM1117-3.3 and LD1117V33, allowing for easy substitution in designs if needed.
14. Suitable for a Wide Range of Applications:
- The AMS1117-3.3 UMW is ideal for:
- Microcontroller Power Supply: Provides a stable 3.3V supply for microcontrollers like Arduino, ESP8266, ESP32, STM32, etc.
- Sensor Modules: Powers sensors and modules that require a 3.3V supply.
- Battery-Powered Devices: Efficiently powers portable and battery-operated devices.
- Embedded Systems: Used in IoT devices, industrial control systems, and consumer electronics.
- Low-Power Circuits: Suitable for powering low-power components in various electronic systems.
The AMS1117-3.3 UMW is a highly efficient, reliable, and cost-effective voltage regulator that offers numerous advantages for a wide range of applications. Its low dropout voltage, high accuracy, robust protection features, and compact design make it an excellent choice for engineers and hobbyists alike. Whether you’re designing a microcontroller-based project, a sensor module, or a battery-powered device, the AMS1117-3.3 UMW provides a dependable and efficient solution for your voltage regulation needs.
Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Advanced Monolithic Systems (AMS) / UMW (specific variant) |
| Part Number | AMS1117-3.3 UMW |
| Series | AMS1117 |
| Product Category | Linear Voltage Regulators – LDO (Low Dropout) |
| Output Voltage | 3.3V (±1%) |
| Output Current | Up to 1A |
| Dropout Voltage | 1.1V (typical at 1A load) |
| Input Voltage Range | 4.4V to 15V |
| Line Regulation | 0.2% (typical) |
| Load Regulation | 0.4% (typical) |
| Quiescent Current | 5mA (typical) |
| Ripple Rejection | 60dB (typical) |
| Operating Temperature Range | -40°C to +125°C |
| Thermal Resistance (Junction to Ambient) | 160°C/W (SOT-223) |
| Thermal Resistance (Junction to Case) | 5°C/W (TO-220) |
| Package Options | SOT-223, TO-252, TO-220 |
| Protection Features | Thermal Overload Protection, Short-Circuit Protection |
| Applications | Microcontrollers, Sensors, Battery-Powered Devices, Embedded Systems |
Comparison with Similar Components
| Parameter | AMS1117-3.3 UMW | LM1117-3.3 (TI) | LD1117V33 (STMicro) | XC6206P332MR (Torex) |
|---|---|---|---|---|
| Output Voltage | 3.3V (±1%) | 3.3V (±1%) | 3.3V (±1%) | 3.3V (±2%) |
| Output Current | 1A | 800mA | 800mA | 200mA |
| Dropout Voltage | 1.1V (1A load) | 1.2V (800mA load) | 1.2V (800mA load) | 160mV (200mA load) |
| Input Voltage Range | 4.4V to 15V | 4.4V to 15V | 4.4V to 15V | 2.0V to 6.0V |
| Quiescent Current | 5mA | 5mA | 5mA | 1µA (typical) |
| Line Regulation | 0.2% (typical) | 0.2% (typical) | 0.2% (typical) | 0.05% (typical) |
| Load Regulation | 0.4% (typical) | 0.4% (typical) | 0.4% (typical) | 0.1% (typical) |
| Ripple Rejection | 60dB (typical) | 60dB (typical) | 60dB (typical) | 75dB (typical) |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +85°C |
| Package Options | SOT-223, TO-252, TO-220 | SOT-223, TO-252, TO-220 | SOT-223, TO-252, TO-220 | SOT-23, SOT-89 |
| Thermal Resistance (Junction to Ambient) | 160°C/W (SOT-223) | 160°C/W (SOT-223) | 160°C/W (SOT-223) | 250°C/W (SOT-23) |
| Protection Features | Thermal, Short-Circuit | Thermal, Short-Circuit | Thermal, Short-Circuit | Thermal, Current Limit |
| Typical Applications | Microcontrollers, Sensors, Embedded Systems | Microcontrollers, Sensors, Embedded Systems | Microcontrollers, Sensors, Embedded Systems | Low-power IoT, Wearables, Battery-Powered Devices |
Key Differences and Recommendations
1. Output Current:
- AMS1117-3.3 UMW: Supports up to 1A, making it suitable for higher-current applications.
- LM1117-3.3 and LD1117V33: Limited to 800mA, which is sufficient for most low-power applications.
- XC6206P332MR: Limited to 200mA, ideal for ultra-low-power applications like wearables and IoT sensors.
2. Dropout Voltage:
- AMS1117-3.3 UMW: Dropout voltage of 1.1V at 1A load.
- LM1117-3.3 and LD1117V33: Dropout voltage of 1.2V at 800mA load.
- XC6206P332MR: Ultra-low dropout voltage of 160mV at 200mA load, making it ideal for battery-powered devices with tight voltage margins.
3. Input Voltage Range:
- AMS1117-3.3 UMW, LM1117-3.3, LD1117V33: Wide input range of 4.4V to 15V, suitable for a variety of power sources.
- XC6206P332MR: Narrow input range of 2.0V to 6.0V, optimized for low-voltage applications.
4. Quiescent Current:
- AMS1117-3.3 UMW, LM1117-3.3, LD1117V33: Quiescent current of 5mA, which is typical for standard LDOs.
- XC6206P332MR: Ultra-low quiescent current of 1µA, making it ideal for battery-powered devices where power efficiency is critical.
5. Package Options:
- AMS1117-3.3 UMW, LM1117-3.3, LD1117V33: Available in larger packages like SOT-223, TO-252, and TO-220, which are suitable for higher-power applications.
- XC6206P332MR: Available in smaller packages like SOT-23 and SOT-89, ideal for space-constrained designs.
6. Ripple Rejection:
- AMS1117-3.3 UMW, LM1117-3.3, LD1117V33: Ripple rejection of 60dB, which is sufficient for most applications.
- XC6206P332MR: Higher ripple rejection of 75dB, making it better for noise-sensitive applications.
7. Thermal Performance:
- AMS1117-3.3 UMW, LM1117-3.3, LD1117V33: Higher thermal resistance in SOT-223 package (160°C/W), requiring proper heat dissipation for high-current applications.
- XC6206P332MR: Higher thermal resistance in SOT-23 package (250°C/W), but its low current rating reduces heat generation.
Applications Comparison
| Component | Best For |
|---|---|
| AMS1117-3.3 UMW | General-purpose applications requiring up to 1A current (e.g., microcontrollers, sensors, embedded systems). |
| LM1117-3.3 | Similar to AMS1117-3.3 but with slightly lower current capability (800mA). |
| LD1117V33 | Comparable to LM1117-3.3, with similar performance and applications. |
| XC6206P332MR | Ultra-low-power applications like wearables, IoT sensors, and battery-powered devices. |
Summary
- AMS1117-3.3 UMW is the best choice for higher-current applications (up to 1A) where a stable 3.3V supply is needed.
- LM1117-3.3 and LD1117V33 are good alternatives for medium-current applications (up to 800mA).
- XC6206P332MR is ideal for ultra-low-power applications where space, efficiency, and low dropout voltage are critical.
Datasheet
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