L7809ABV-DG

Product Overview

• Category: Voltage Regulator
• Use: To regulate and stabilize the output voltage in electronic circuits
• Characteristics:
  • Fixed output voltage of 9V
  • Maximum output current of 1.5A
  • Low dropout voltage
  • Thermal overload protection
• Package: TO-220
• Essence: Integrated circuit (IC)
• Packaging/Quantity: Available in reels or tubes, quantity varies based on manufacturer

Specifications

• Input Voltage Range: 11V to 35V
• Output Voltage: 9V
• Output Current: Up to 1.5A
• Dropout Voltage: 2V (typical)
• Line Regulation: 0.04% (typical)
• Load Regulation: 0.3% (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L7809ABV-DG has three pins:

1. Input Pin (Vin): Connects to the input voltage source.
2. Ground Pin (GND): Connected to the ground reference of the circuit.
3. Output Pin (Vout): Provides the regulated output voltage.

Functional Features

• Voltage regulation: The L7809ABV-DG ensures a stable output voltage of 9V regardless of input voltage fluctuations.
• Overload protection: The device incorporates thermal overload protection, safeguarding it from excessive heat and preventing damage.
• Low dropout voltage: The regulator maintains a low voltage drop between the input and output, minimizing power dissipation.

Advantages and Disadvantages

Advantages: - Easy to use and integrate into electronic circuits - Reliable and efficient voltage regulation - Compact size and standard package for easy mounting - Wide operating temperature range

Disadvantages: - Fixed output voltage limits flexibility in certain applications - Dropout voltage may cause power dissipation in high current scenarios

Working Principles

The L7809ABV-DG is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It compares the reference voltage with the feedback voltage and adjusts the pass transistor accordingly to maintain a constant output voltage.

Detailed Application Field Plans

The L7809ABV-DG finds applications in various electronic devices, including but not limited to: - Power supplies - Battery chargers - Audio amplifiers - Industrial control systems - Automotive electronics

Detailed and Complete Alternative Models

• LM7809: Similar fixed 9V voltage regulator from Texas Instruments
• MC7809: Another 9V voltage regulator from ON Semiconductor
• UA7809: Fixed 9V voltage regulator from Fairchild Semiconductor

These alternative models offer similar functionality and can be used as replacements for the L7809ABV-DG in appropriate applications.

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