L78L09ABD13TR

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: Low Dropout, Fixed Output Voltage
• Package: SOT-89
• Essence: Linear Voltage Regulator
• Packaging/Quantity: Tape and Reel, 3000 pieces per reel

Specifications

• Input Voltage Range: 10V to 35V
• Output Voltage: 9V
• Output Current: 100mA
• Dropout Voltage: 1.7V (typical)
• Line Regulation: ±0.2% (typical)
• Load Regulation: ±0.4% (typical)
• Quiescent Current: 5mA (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L78L09ABD13TR is a three-terminal voltage regulator with the following pin configuration:

• Pin 1: Input Voltage (VIN)
• Pin 2: Ground (GND)
• Pin 3: Output Voltage (VOUT)

Functional Features

• Low dropout voltage allows for efficient regulation even when the input voltage is close to the output voltage.
• Fixed output voltage of 9V ensures a stable power supply for various applications.
• Internal thermal overload protection prevents damage due to excessive temperature.
• Short-circuit current limiting protects the device and connected components from excessive current.

Advantages and Disadvantages

Advantages: - Compact SOT-89 package enables space-saving designs. - Low dropout voltage minimizes power dissipation and improves efficiency. - Wide operating temperature range makes it suitable for various environments.

Disadvantages: - Limited output current of 100mA may not be sufficient for high-power applications. - Fixed output voltage restricts flexibility in voltage selection.

Working Principles

The L78L09ABD13TR is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the reference voltage with a fraction of the output voltage, adjusting the pass transistor's resistance to maintain a stable output voltage.

Detailed Application Field Plans

The L78L09ABD13TR is commonly used in various electronic devices and applications, including: - Power supplies for microcontrollers and other digital ICs. - Battery-powered devices requiring a stable 9V power source. - Automotive electronics, such as dashboard displays and audio systems. - Industrial control systems and automation equipment. - Consumer electronics, such as audio/video equipment and portable devices.

Detailed and Complete Alternative Models

• LM7809: Similar fixed 9V voltage regulator in TO-220 package.
• MC7809: Fixed 9V voltage regulator with higher output current capability.
• LT1086: Adjustable voltage regulator with a wide input voltage range.
• LM317: Adjustable voltage regulator with a wide range of output voltages.

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