L78L12CD13TR

Basic Information Overview

• Category: Voltage Regulator
• Use: To regulate and stabilize voltage levels in electronic circuits
• Characteristics:
  • Input Voltage Range: 14V to 35V
  • Output Voltage: 12V
  • Maximum Output Current: 100mA
  • Package Type: TO-92
  • Essence: Linear voltage regulator
  • Packaging/Quantity: Tape and Reel, 2,500 units per reel

Specifications

• Input Voltage Range: 14V to 35V
• Output Voltage: 12V
• Output Current: Up to 100mA
• Dropout Voltage: 2V (typical)
• Line Regulation: ±0.1% (typical)
• Load Regulation: ±0.5% (typical)
• Quiescent Current: 4.5mA (typical)
• Operating Temperature Range: -40°C to +125°C
• Package: TO-92

Detailed Pin Configuration

The L78L12CD13TR has three pins: 1. Input (VIN): Connects to the input voltage source. 2. Ground (GND): Connected to the ground reference of the circuit. 3. Output (VOUT): Provides the regulated output voltage.

Functional Features

• Regulates and stabilizes the input voltage to a constant 12V output.
• Provides protection against overcurrent and thermal overload.
• Low dropout voltage ensures efficient operation even with low input-output voltage differentials.
• Excellent line and load regulation characteristics ensure stable output voltage under varying conditions.

Advantages

• Compact TO-92 package allows for easy integration into various electronic circuits.
• Wide input voltage range makes it suitable for a variety of applications.
• Low quiescent current minimizes power consumption when the load is light.
• Provides a stable and reliable 12V output for powering sensitive electronic components.

Disadvantages

• Limited maximum output current of 100mA may not be sufficient for high-power applications.
• Dropout voltage of 2V may result in higher power dissipation and reduced efficiency in low input-output voltage scenarios.

Working Principles

The L78L12CD13TR is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the output voltage with a reference voltage and adjusting the pass transistor's resistance to maintain a constant output voltage of 12V. The regulator continuously monitors the input voltage, adjusting the pass transistor as necessary to compensate for any changes and provide a stable output.

Detailed Application Field Plans

The L78L12CD13TR is commonly used in various electronic devices and circuits, including: 1. Power supplies for microcontrollers, sensors, and other low-power digital components. 2. Battery-powered devices requiring a stable 12V supply, such as portable audio players and handheld instruments. 3. Automotive electronics, providing regulated voltage for sensors, actuators, and control modules. 4. Industrial automation systems, where precise and stable voltage regulation is crucial for accurate operation. 5. Embedded systems, ensuring a reliable power source for microprocessors, memory modules, and communication interfaces.

Detailed and Complete Alternative Models

1. LM7812: A popular alternative from Texas Instruments with similar specifications and pin configuration.
2. UA7812: Another alternative from Fairchild Semiconductor offering comparable performance.
3. MC7812: An alternative from ON Semiconductor known for its reliability and wide operating temperature range.

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