L7809ABD2T-TR

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Fixed Output Voltage: 9V - Maximum Output Current: 1.5A - Input Voltage Range: 11V to 35V - Dropout Voltage: 2V - Operating Temperature Range: -40°C to +125°C - Package Type: D²PAK (TO-263) - Essence: Linear voltage regulator

Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

The L7809ABD2T-TR is a fixed voltage regulator IC that provides a stable output voltage of 9V. It is designed to regulate the input voltage within a specified range and deliver a constant output voltage even when the input voltage fluctuates. The maximum output current it can handle is 1.5A, making it suitable for various electronic applications.

Detailed Pin Configuration

The L7809ABD2T-TR has three pins:

1. Input Pin (VIN): This pin is connected to the input voltage source.
2. Ground Pin (GND): This pin is connected to the ground or reference voltage.
3. Output Pin (VOUT): This pin provides the regulated output voltage of 9V.

Functional Features

• Voltage Regulation: The L7809ABD2T-TR ensures a stable output voltage of 9V, regardless of variations in the input voltage.
• Overcurrent Protection: It incorporates overcurrent protection to safeguard the circuit from excessive current flow.
• Thermal Shutdown: In case of excessive heat generation, the IC automatically shuts down to prevent damage.
• Short-Circuit Protection: It includes short-circuit protection to prevent damage due to accidental short circuits.

Advantages and Disadvantages

Advantages: - Simple and reliable voltage regulation solution - Wide input voltage range - High output current capability - Built-in protection features

Disadvantages: - Linear regulators dissipate excess power as heat, reducing efficiency. - Limited dropout voltage may restrict its use in low input voltage applications.

Working Principles

The L7809ABD2T-TR 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 of 9V. The excess voltage is dissipated as heat through the pass transistor.

Detailed Application Field Plans

The L7809ABD2T-TR is commonly used in various electronic devices and systems, including: - Power supplies for microcontrollers and other digital ICs - Audio amplifiers - Battery charging circuits - Industrial control systems - Automotive electronics

Detailed and Complete Alternative Models

1. LM7809: This is a popular alternative from Texas Instruments with similar specifications and pin configuration.
2. MC7809: Manufactured by ON Semiconductor, it offers comparable performance to the L7809ABD2T-TR.
3. UA7809: A voltage regulator IC from Fairchild Semiconductor, suitable for many applications requiring a 9V output.

These alternative models can be considered based on availability, pricing, and specific application requirements.

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