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L79L12ACZ
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L79L12ACZ

Product Overview

  • Category: Voltage Regulator
  • Use: To regulate and stabilize the output voltage in electronic circuits
  • Characteristics: Low dropout voltage, high current capability, thermal overload protection
  • Package: TO-220
  • Essence: Linear voltage regulator
  • Packaging/Quantity: Available in tape and reel packaging, quantity varies based on supplier

Specifications

  • Input Voltage: Up to 35V
  • Output Voltage: -12V
  • Output Current: Up to 100mA
  • Dropout Voltage: 1.7V (typical)
  • Operating Temperature Range: -40°C to +125°C
  • Line Regulation: 0.04% (typical)
  • Load Regulation: 0.3% (typical)

Detailed Pin Configuration

The L79L12ACZ voltage regulator 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 -12V output voltage.

Functional Features

  • Voltage Regulation: The L79L12ACZ maintains a stable -12V output voltage regardless of variations in input voltage or load conditions.
  • Low Dropout Voltage: The regulator can operate with a small voltage difference between the input and output, minimizing power dissipation.
  • High Current Capability: Capable of supplying up to 100mA of current to the load.
  • Thermal Overload Protection: Built-in protection mechanism that prevents the regulator from overheating.

Advantages and Disadvantages

Advantages: - Simple and easy to use. - Provides a stable output voltage for sensitive electronic components. - Suitable for low-power applications. - Offers thermal overload protection.

Disadvantages: - Limited output current capability compared to other voltage regulators. - Requires external capacitors for stability.

Working Principles

The L79L12ACZ is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It operates by comparing the output voltage with a reference voltage and adjusting the pass transistor accordingly. When the input voltage or load changes, the regulator adjusts the pass transistor to maintain a constant -12V output.

Detailed Application Field Plans

The L79L12ACZ voltage regulator finds applications in various electronic circuits, including:

  1. Power supplies for audio amplifiers
  2. Battery-powered devices
  3. Automotive electronics
  4. Industrial control systems
  5. Instrumentation and measurement equipment

Detailed and Complete Alternative Models

  1. LM7812: A popular alternative with similar specifications and pin configuration.
  2. MC7912: Negative voltage regulator with comparable characteristics.
  3. LT1086: Adjustable positive voltage regulator with higher current capability.

These alternatives can be considered based on specific requirements and availability.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací L79L12ACZ v technických řešeních

Sure! Here are 10 common questions and answers related to the application of L79L12ACZ in technical solutions:

  1. Q: What is L79L12ACZ? A: L79L12ACZ is a voltage regulator IC that provides a fixed output voltage of -12V.

  2. Q: What is the input voltage range for L79L12ACZ? A: The input voltage range for L79L12ACZ is typically between -35V and -15V.

  3. Q: What is the maximum output current of L79L12ACZ? A: The maximum output current of L79L12ACZ is 100mA.

  4. Q: Can L79L12ACZ be used to regulate positive voltages? A: No, L79L12ACZ is specifically designed to regulate negative voltages.

  5. Q: How does L79L12ACZ handle thermal protection? A: L79L12ACZ has built-in thermal shutdown protection that prevents the IC from overheating.

  6. Q: Is L79L12ACZ suitable for low-power applications? A: Yes, L79L12ACZ is commonly used in low-power applications such as audio amplifiers and sensors.

  7. Q: Can L79L12ACZ be used in automotive applications? A: Yes, L79L12ACZ is often used in automotive electronics where a regulated -12V supply is required.

  8. Q: Does L79L12ACZ require any external components for operation? A: Yes, L79L12ACZ typically requires input and output capacitors for stability and filtering.

  9. Q: What is the typical dropout voltage of L79L12ACZ? A: The typical dropout voltage of L79L12ACZ is around 2V.

  10. Q: Can L79L12ACZ be used in high-temperature environments? A: L79L12ACZ has a maximum operating temperature of 125°C, making it suitable for many high-temperature applications.

Please note that these answers are general and may vary depending on the specific datasheet and manufacturer's specifications for L79L12ACZ.