LL5819 L0

The "LL5819 L0" is a specific model of a Zener diode manufactured by Taiwan Semiconductor Manufacturing Company (TSMC). This component is designed to provide voltage regulation and protection in various electronic circuits. Here’s a detailed description of its features and specifications:

General Overview

• Type: Zener Diode
• Manufacturer: Taiwan Semiconductor
• Part Number: LL5819 L0

Physical Characteristics

• Package Type: Typically available in a DO-41 package, which is a cylindrical glass package with two leads for through-hole mounting.
• Dimensions: The DO-41 package usually measures approximately 4.6 mm in diameter and 10.2 mm in length, making it suitable for various PCB layouts.
• Marking: The diode is often marked with its part number and a polarity indicator to ensure correct installation.

Electrical Specifications

• Zener Voltage (Vz): The LL5819 L0 has a nominal Zener voltage of 3.6V, which means it can maintain this voltage across its terminals when reverse-biased.
• Power Dissipation (Pd): It typically has a maximum power dissipation rating of around 1W, allowing it to handle significant power without overheating.
• Reverse Current (Ir): At the Zener voltage, the reverse current is usually specified at a certain level (e.g., 5 mA), which indicates the current flowing through the diode when it is in the breakdown region.
• Temperature Coefficient: The temperature coefficient of the Zener voltage is generally specified, indicating how the Zener voltage changes with temperature variations.

Performance Characteristics

• Dynamic Impedance (Zz): The dynamic impedance of the LL5819 L0 is low, which ensures stable voltage regulation under varying load conditions.
• Reverse Breakdown Voltage: The diode is designed to operate effectively in the reverse breakdown region, making it ideal for voltage clamping and regulation applications.

Applications

• Voltage Regulation: Commonly used in power supply circuits to maintain a stable output voltage.
• Overvoltage Protection: Protects sensitive components from voltage spikes by clamping excess voltage.
• Signal Clamping: Used in signal processing circuits to limit voltage levels and prevent distortion.

Reliability and Compliance

• Operating Temperature Range: The LL5819 L0 typically operates within a wide temperature range, often from -55°C to +150°C, making it suitable for various environmental conditions.
• RoHS Compliance: The component is usually compliant with RoHS standards, indicating it is free from hazardous substances.

Conclusion

The LL5819 L0 from Taiwan Semiconductor is a reliable and efficient Zener diode that serves critical functions in voltage regulation and protection in electronic circuits. Its robust design, combined with its electrical characteristics, makes it a popular choice among engineers and designers in the electronics industry.