L78L05CZ

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: Linear, Fixed Output Voltage, Positive Polarity
• Package: TO-92
• Essence: The L78L05CZ is a three-terminal voltage regulator that provides a fixed output voltage of 5V. It is commonly used to regulate and stabilize the voltage in electronic circuits.
• Packaging/Quantity: Available in tape and reel packaging, with 2,500 units per reel.

Specifications

• Input Voltage: Up to 35V
• Output Voltage: 5V
• Output Current: Up to 100mA
• Dropout Voltage: 2V (typical)
• Quiescent Current: 4mA (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The L78L05CZ has three pins:

1. Input (VIN): Connects to the input voltage source.
2. Ground (GND): Connected to the ground reference.
3. Output (VOUT): Provides the regulated output voltage.

Functional Features

• Voltage Regulation: The L78L05CZ maintains a constant output voltage of 5V, even when the input voltage fluctuates.
• Short Circuit Protection: It includes internal current limiting and thermal shutdown protection to prevent damage in case of a short circuit or excessive power dissipation.
• Low Dropout Voltage: With a dropout voltage of only 2V, it can operate efficiently even when the input voltage is close to the desired output voltage.

Advantages and Disadvantages

Advantages: - Simple and easy to use. - Low cost and widely available. - Reliable and stable voltage regulation. - Suitable for low-power applications.

Disadvantages: - Limited output current capability (up to 100mA). - Requires an input voltage at least 2V higher than the desired output voltage.

Working Principles

The L78L05CZ is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a constant output voltage.

Detailed Application Field Plans

The L78L05CZ is commonly used in various electronic devices and circuits, including:

1. Power Supplies: It can be used as a voltage regulator in power supply circuits to provide a stable 5V output for microcontrollers, sensors, and other components.
2. Embedded Systems: It is suitable for regulating the voltage in embedded systems, ensuring reliable operation of digital and analog circuits.
3. Consumer Electronics: The L78L05CZ finds applications in consumer electronics such as TVs, audio amplifiers, and DVD players, where it provides regulated voltage to different sections of the circuitry.

Detailed and Complete Alternative Models

• LM7805: A popular alternative from Texas Instruments.
• MC7805: Another alternative from ON Semiconductor.
• UA7805: An alternative option from Fairchild Semiconductor.

These alternatives have similar specifications and pin configurations, making them suitable replacements for the L78L05CZ in various applications.

In conclusion, the L78L05CZ is a widely used three-terminal voltage regulator that provides a fixed 5V output. Its simplicity, low cost, and reliability make it a popular choice for voltage regulation in numerous electronic circuits and devices.