L7809ACD2T-TR

Product Overview

Category

L7809ACD2T-TR belongs to the category of voltage regulators.

Use

It is commonly used to regulate and stabilize voltage in electronic circuits.

Characteristics

• Input Voltage Range: 11V to 35V
• Output Voltage: 9V
• Maximum Output Current: 1.5A
• Dropout Voltage: 2V
• Operating Temperature Range: -40°C to +125°C
• Package Type: D²PAK (TO-263)
• Mounting Style: Surface Mount
• RoHS Compliant: Yes

Packaging/Quantity

The L7809ACD2T-TR voltage regulator is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Input Voltage Range: 11V to 35V
• Output Voltage: 9V
• Output Current: Up to 1.5A
• Dropout Voltage: 2V
• Line Regulation: ±0.2%
• Load Regulation: ±0.4%
• Ripple Rejection Ratio: 62dB
• Quiescent Current: 6mA
• Thermal Shutdown Protection: Yes
• Short Circuit Protection: Yes

Pin Configuration

The L7809ACD2T-TR voltage regulator has three pins:

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

Functional Features

• Regulates and stabilizes voltage within a specified range.
• Provides a constant output voltage of 9V.
• Protects against thermal shutdown and short circuits.
• Offers good line and load regulation for stable performance.
• RoHS compliant, ensuring environmental friendliness.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows for versatile applications.
• High output current capability of up to 1.5A.
• Excellent line and load regulation for stable voltage output.
• Thermal shutdown and short circuit protection enhance safety.

Disadvantages

• Dropout voltage of 2V may limit its use in low voltage applications.
• Quiescent current consumption of 6mA may be relatively high for power-sensitive designs.

Working Principles

The L7809ACD2T-TR operates based on the principle of linear voltage regulation. It takes an input voltage within the specified range and regulates it to a constant 9V output. The internal circuitry of the regulator adjusts the voltage by dissipating excess energy as heat. This ensures a stable output voltage despite variations in the input voltage or load conditions.

Detailed Application Field Plans

The L7809ACD2T-TR voltage regulator finds applications in various electronic systems that require a stable 9V power supply. Some common application fields include:

1. Power supplies for microcontrollers and digital circuits.
2. Battery charging circuits.
3. Audio amplifiers and preamplifiers.
4. Industrial control systems.
5. Automotive electronics.
6. LED lighting systems.
7. Robotics and automation.

Detailed and Complete Alternative Models

1. LM7809: A popular alternative from Texas Instruments with similar specifications and pin configuration.
2. MC7809: An alternative from ON Semiconductor offering comparable performance characteristics.
3. UA7809: A voltage regulator from Fairchild Semiconductor that can serve as a substitute for the L7809ACD2T-TR.

These alternative models provide similar functionality and can be used as replacements for the L7809ACD2T-TR in various applications.

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