Introduction
The LM3480 is a highly efficient low dropout (LDO) linear voltage regulator designed and manufactured by Texas Instruments. Known for its compact size and reliable performance, the TI LM3480 Voltage Regulator has become a popular choice among engineers for various low-power and space-constrained applications. In this comprehensive guide, we will explore the features, pinout, applications, and advantages of the LM3480 voltage regulator. Whether you are an electronics hobbyist or a seasoned engineer, this article will provide valuable insights into leveraging the LM3480 Regulator for your projects.
Key Features and Specifications
The LM3480 offers several noteworthy features that make it stand out among other voltage regulators. Here’s a quick overview of its primary specifications:
· Wide Input Voltage Range: Operates with input voltages up to 30 V
· Low Dropout Voltage: Typical dropout voltage is around 300 mV at 100 mA
· Fixed Output Voltage Options: Available in 3.3 V, 5 V, 12 V, and 15 V variants
· Compact Package: 3-lead SOT-23 form factor
· High Input Voltage Capability: Supports up to 30 V input, suitable for flexible system design
· Low Quiescent Current: Just 90 μA, ideal for battery-powered applications
· Output Accuracy: Maintains ±5% output voltage accuracy
· Broad Temperature Range: Operates efficiently from –40°C to +125°C
These features make the LM3480 ideal for portable electronics, embedded systems, industrial automation, and more.
Pin Configuration and Pinout of LM3480
The Texas Instruments LM3480 Voltage Regulator is available in a 3-lead SOT-23 package. The pinout is straightforward and easy to integrate into PCB layouts:
Pin Name | Pin Number | I/O | Description |
OUT | 1 | O | Output Voltage |
IN | 2 | I | Input Voltage Supply |
GND | 3 | - | Common Ground |
LM3480 Practical Applications
1. Tiny 5V to 3.3V Converter
One of the most common uses of the LM3480 is as a voltage converter from 5 V to 3.3 V. Due to its low dropout voltage of 300 mV, the regulator can maintain a stable 3.3 V output even with minor fluctuations in input voltage.
2. Post Regulator for DC/DC Converters
In power supply circuits that utilize switching DC/DC converters, the LM3480 acts as a post regulator to reduce noise and stabilize voltage levels. This combination is beneficial for sensitive analog circuits and RF modules.
3. Bias Supply for Analog Circuits
The LM3480’s low output noise and stable regulation make it an excellent choice for biasing analog circuits such as operational amplifiers and data converters.
4. Replacement for LM78Lxx Series
Compared to the LM78Lxx series, the LM3480 offers a more compact size and lower dropout voltage, making it ideal for replacing older voltage regulators in updated circuit designs.
· Tiny 5V to 3.3V Converter: Suitable for stable output at low current levels.
· Post Regulator for DC/DC Converters: Reduces noise and stabilizes voltage levels.
· Bias Supply for Analog Circuits: Provides low noise, stable biasing for op-amps and sensors.
· Replacement for LM78Lxx Series: Smaller size and lower dropout voltage.
LM3480 vs. AMS1117 vs. LP2985
Feature | LM3480 | AMS1117 | LP2985 |
Max Output Current | 100 mA | 800 mA | 150 mA |
Quiescent Current | 90 μA | ~5 mA | 50 μA |
Dropout Voltage (typ) | 300 mV | 1.1 V | 280 mV |
Package | SOT-23 | TO-252 | SOT-23 |
Why Choose LM3480 for Your Project
Choosing the right voltage regulator is crucial for any electronic design. The LM3480 provides an optimal balance of size, efficiency, and performance. Its ability to operate with a low dropout voltage and low quiescent current makes it suitable for battery-operated devices, portable electronics, and applications where power efficiency is key.
Moreover, the LM3480’s reliable performance across a wide temperature range makes it a preferred choice in industrial and automotive applications where environmental conditions can vary significantly.
Conclusion
The LM3480 voltage regulator is a reliable and efficient component for modern electronic designs. Its compact size, robust feature set, and flexibility make it a top choice for engineers looking to optimize their power management solutions. By choosing the LM3480, you are ensuring stable voltage regulation with minimal power loss—a critical factor in today’s compact and energy-efficient devices.
For more technical details and application examples, refer to the official Texas Instruments LM3480 datasheet.
If you found this guide helpful, please share it with fellow engineers and enthusiasts. Have questions about using the LM3480? Leave a comment below or contact us for more insights!