XB3480M3-5.0 100-mA, Quasi Low-Dropout Linear Voltage Regulator

Overview

The XB3480M3-5.0 from XINLUDA is a highly efficient Low Dropout Regulator (LDO) designed to provide a stable 5.0V output with minimal voltage loss. It is designed for applications requiring precise voltage regulation with low dropout voltage. The LM3480IM3X-5.0 from Texas Instruments is a comparable product in the market, offering similar voltage regulation. However, the XB3480M3-5.0 outperforms the LM3480IM3X-5.0 in several critical areas such as efficiency, thermal performance, and accuracy.

Dropout Voltage

Dropout voltage is a crucial factor for LDO regulators, as it directly impacts their efficiency and operation when the input voltage is close to the output voltage.

• The XB3480M3-5.0 offers an ultra-low dropout voltage of 40mV at 1A load, which means it can maintain a stable 5.0V output even when the input voltage is very close to the output voltage.

• In comparison, the LM3480IM3X-5.0 has a dropout voltage of 120mV at 1A load, which is noticeably higher. This makes the XB3480M3-5.0 more efficient in low voltage scenarios, as it can regulate the output more effectively with minimal loss.

The XB3480M3-5.0’s lower dropout voltage results in higher efficiency, especially in applications where the input voltage is only slightly higher than the desired output voltage, such as battery-powered devices or low-voltage systems.

Thermal Performance

Thermal performance is another critical aspect when comparing LDO regulators, especially in high-current applications.

• The XB3480M3-5.0 is designed with a low junction-to-case thermal resistance of 38°C/W, ensuring effective heat dissipation even under high loads.

• On the other hand, the LM3480IM3X-5.0 features a higher thermal resistance of 60°C/W, which could result in higher operating temperatures when running at full load for extended periods.

This superior thermal performance in the XB3480M3-5.0 ensures that it remains stable and reliable under demanding conditions, reducing the risk of thermal shutdown and enhancing the long-term durability of the device.

Output Voltage Accuracy

Output voltage accuracy is crucial for applications that require precise regulation of the output voltage to maintain the stability of connected circuits.

• The XB3480M3-5.0 provides an output voltage tolerance of ±2%, ensuring more precise and stable performance over varying conditions and load variations.

• The LM3480IM3X-5.0 offers a wider tolerance of ±3%, which might not be sufficient for applications that require tighter regulation.

With the XB3480M3-5.0, users can expect better voltage stability, making it ideal for sensitive electronics, communication devices, and other applications that require highly reliable performance.

Current Capability and Efficiency

Both the XB3480M3-5.0 and the LM3480IM3X-5.0 are capable of providing up to 1A of output current, but the XB3480M3-5.0 stands out in terms of efficiency.

• The XB3480M3-5.0 offers significantly higher efficiency due to its low dropout voltage, which reduces power loss during operation.

• The LM3480IM3X-5.0, while capable of providing the same current, operates with a higher dropout voltage, leading to greater power dissipation and lower overall efficiency.

The superior efficiency of the XB3480M3-5.0 means that it is better suited for energy-sensitive applications, such as battery-powered devices, where maximizing battery life is essential.

Package and Size

Both the XB3480M3-5.0 and the LM3480IM3X-5.0 come in SOT-23-5 packages, which are compact and suitable for space-constrained designs. However, the XB3480M3-5.0 is designed with a smaller package footprint that is optimized for high-density PCB layouts, which helps reduce the overall size of the end product.

Additionally, the lower quiescent current of the XB3480M3-5.0 reduces the power consumption of the regulator itself, which is an important consideration in space- and energy-limited applications.

Application Suitability

The XB3480M3-5.0 is optimized for battery-powered systems, portable devices, and low-voltage electronics that require stable 5.0V regulation with minimal power loss. It is ideal for applications such as mobile phones, IoT devices, wearable technology, and handheld equipment.

While the LM3480IM3X-5.0 can also be used in similar applications, the XB3480M3-5.0’s lower dropout voltage, superior thermal performance, and better efficiency make it the more suitable choice for modern, energy-efficient designs, particularly where performance, reliability, and minimal power consumption are key design priorities.

Conclusion

In conclusion, the XINLUDA XB3480M3-5.0 stands out over the Texas Instruments LM3480IM3X-5.0 in several important areas:

• Lower dropout voltage leading to enhanced efficiency, especially in low voltage applications

• Superior thermal performance, ensuring reliable operation at higher current levels

• Tighter output voltage accuracy, providing more stable and precise voltage regulation

• Higher overall efficiency, which is crucial for energy-sensitive and battery-powered devices

These advantages make the XB3480M3-5.0 the ideal choice for modern applications requiring precise, reliable, and energy-efficient voltage regulation.