CDLL5260B

Introduction

The CDLL5260B is a single Zener diode packaged in a 5.4 mm × 7.8 mm very small outline package (SOT-23). It is designed to provide voltage regulation with very low thermal resistance and is intended for use as a voltage shunt regulator, overvoltage protection, or microphone biasing.

Application Fields

In many industries, the demand for smaller and more efficient components is growing. The CDLL5260B is an ideal choice for devices that require a low dropout voltage and a smaller overall package size. Due to the small size of the diode, it can be used in devices where space is a premium, such as cameras, notebook PCs, and mobile phones. The low thermal resistance and power dissipation capabilities also make it suitable for use in linear and switch mode regulator applications.

In addition to its use as a voltage shunt regulator, the CDLL5260B can also be used in overvoltage protection and microphone biasing circuits. In overvoltage protection, the diode is placed in series with a load. When the voltage across the load exceeds a certain threshold, the diode begins to conduct and the excess voltage is diverted away from the load. This prevents damage to the load and other components further downstream. In microphone biasing, the diode is used to passively bias an electret microphone, allowing it to operate with a lower noise floor.

Working Principles

At the core of the CDLL5260B is a Zener diode. A Zener diode is a type of diode that allows current to flow in either direction, but breaks down when the voltage across it exceeds a certain threshold. This breakdown voltage, called the Zener voltage, is specified in the data sheet for the part and is usually between 1.2 V and 36 V. The CDLL5260B has a Zener voltage of 13.2 V. When the voltage across the diode exceeds 13.2 V, it will break down and conduct, diverting the current away from the load.

The low thermal resistance of the CDLL5260B is due to its small form factor. The diode is packaged in a 5.4 mm × 7.8 mm SOT-23 package, allowing it to dissipate heat more efficiently than larger packages. The power dissipation ratings specified in the data sheet indicate that the diode can dissipate up to 150 mW of power, and it has an operating temperature range of -55 °C to 150 °C.

Conclusion

In conclusion, the CDLL5260B is a single Zener diode packaged in a 5.4 mm × 7.8 mm SOT-23 package. It has a Zener voltage of 13.2 V and is intended for use as a voltage shunt regulator, overvoltage protection, or microphone biasing. The low thermal resistance and power dissipation capabilities of the diode make it an ideal choice for devices that require a small size and higher efficiency.