AN78L07

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: Low dropout voltage, fixed output voltage
• Package: TO-220, TO-92
• Essence: Linear regulator
• Packaging/Quantity: Tape and reel, 1000 pieces per reel

Specifications

• Input Voltage Range: 8V to 35V
• Output Voltage: 7V
• Output Current: 100mA
• Dropout Voltage: 1.7V (typical)
• Line Regulation: 0.2% (typical)
• Load Regulation: 0.4% (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The AN78L07 IC has three pins:

1. Input (Vin): This pin is used to connect the input voltage.
2. Ground (GND): This pin is connected to the ground or reference voltage.
3. Output (Vout): The regulated output voltage is obtained from this pin.

Functional Features

• Low dropout voltage: The AN78L07 has a low dropout voltage, allowing it to regulate the output voltage even when the input voltage is close to the desired output voltage.
• Fixed output voltage: The IC provides a fixed output voltage of 7V, which remains constant regardless of changes in the input voltage or load conditions.
• Overcurrent protection: The AN78L07 includes built-in overcurrent protection, safeguarding the circuit from excessive current flow.
• Thermal shutdown protection: In case of excessive temperature rise, the IC automatically shuts down to prevent damage.

Advantages and Disadvantages

Advantages: - Simple and compact design - Easy to use and integrate into various circuits - Low dropout voltage ensures efficient regulation - Built-in overcurrent and thermal protection

Disadvantages: - Limited output current capability (100mA) - Fixed output voltage may not suit all applications

Working Principles

The AN78L07 is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It operates by comparing the reference voltage with the feedback voltage obtained from a voltage divider network. The series pass transistor adjusts its resistance to maintain a constant output voltage, compensating for changes in the input voltage and load conditions.

Detailed Application Field Plans

The AN78L07 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 and regulated voltage to other components.
2. Audio amplifiers: The IC can be employed in audio amplifier circuits to ensure a consistent power supply voltage, resulting in improved audio quality.
3. Battery-powered devices: It finds application in battery-powered devices where a stable voltage is required to operate the circuitry efficiently.

Detailed and Complete Alternative Models

Some alternative models to the AN78L07 include:

1. LM7805: A popular 5V linear voltage regulator with similar characteristics and pin configuration.
2. MC78L05: Another 5V linear voltage regulator available in different packages.
3. LT1084: A high-current linear voltage regulator capable of delivering up to 5A of output current.

These alternative models offer different output voltages and current capabilities, providing flexibility for various applications.

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