L78L05ABZ

Product Overview

• Category: Linear Voltage Regulator
• Use: Voltage regulation in electronic circuits
• Characteristics: Low dropout voltage, fixed output voltage of 5V, maximum output current of 100mA, TO-92 package
• Package: TO-92
• Essence: Integrated circuit that provides a stable 5V output voltage from a higher input voltage
• Packaging/Quantity: Available in reels or tubes, quantity varies based on manufacturer

Specifications

• Input Voltage Range: Up to 35V
• Output Voltage: 5V (±4% tolerance)
• Output Current: Up to 100mA
• Dropout Voltage: 2V (maximum)
• Quiescent Current: 6mA (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L78L05ABZ has three pins:

1. Input (VIN): Connects to the higher input voltage source.
2. Ground (GND): Connected to the ground reference of the circuit.
3. Output (VOUT): Provides the regulated 5V output.

Functional Features

• Voltage Regulation: The L78L05ABZ regulates the input voltage to a stable 5V output.
• Low Dropout Voltage: The regulator can operate with a small voltage difference between the input and output.
• Short Circuit Protection: The device is protected against short circuits, preventing damage to the circuitry.
• Thermal Overload Protection: Built-in protection mechanism shuts down the regulator if it exceeds safe operating temperature.

Advantages and Disadvantages

Advantages: - Simple and easy to use. - Provides a stable output voltage. - Offers protection against short circuits and thermal overload.

Disadvantages: - Limited output current capability (up to 100mA). - Dropout voltage may cause power dissipation in high voltage difference scenarios.

Working Principles

The L78L05ABZ is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It operates by comparing the output voltage with a reference voltage and adjusting the pass transistor accordingly. When the input voltage exceeds the desired output voltage, the pass transistor reduces the excess voltage, ensuring a stable 5V output.

Detailed Application Field Plans

The L78L05ABZ finds applications in various electronic circuits where a stable 5V voltage source is required. Some common application areas include:

1. Microcontrollers: Provides regulated power supply for microcontrollers.
2. Digital Logic Circuits: Ensures a stable voltage for digital logic circuits.
3. Sensor Modules: Supplies power to sensor modules requiring a 5V source.
4. Audio Amplifiers: Used as a power supply for audio amplifiers.
5. Battery-Powered Devices: Regulates voltage in battery-powered devices.

Detailed and Complete Alternative Models

1. LM7805: Similar linear voltage regulator with a TO-220 package.
2. UA78M05: Another alternative with a TO-252 package.
3. MC78L05: Low-cost alternative with a TO-92 package.

These alternative models provide similar functionality and can be used as substitutes for the L78L05ABZ based on specific requirements.

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