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L79L12ABD-R
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L79L12ABD-R

Product Overview

  • Category: Voltage Regulator
  • Use: To regulate and stabilize the output voltage in electronic circuits
  • Characteristics:
    • Low dropout voltage
    • High output current capability
    • Thermal overload protection
    • Short-circuit protection
  • Package: TO-252 (DPAK)
  • Essence: Integrated circuit voltage regulator
  • Packaging/Quantity: Tape and reel packaging, quantity varies based on manufacturer

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

Detailed Pin Configuration

The L79L12ABD-R 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 L79L12ABD-R maintains a stable -12V output voltage regardless of variations in the input voltage or load conditions.
  • Low Dropout Voltage: The regulator can operate with a very small voltage difference between the input and output, minimizing power dissipation.
  • Thermal Overload Protection: The device includes built-in protection against excessive temperature, preventing damage to the regulator.
  • Short-Circuit Protection: In case of a short circuit at the output, the regulator limits the current to protect itself and the connected circuitry.

Advantages and Disadvantages

Advantages: - Reliable voltage regulation - Low dropout voltage - Thermal and short-circuit protection

Disadvantages: - Limited output current capability (up to 100mA) - Requires external capacitors for stability

Working Principles

The L79L12ABD-R is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a stable -12V output.

Detailed Application Field Plans

The L79L12ABD-R is commonly used in various electronic applications, including:

  1. Power supplies for audio amplifiers
  2. Battery-powered devices requiring a regulated -12V supply
  3. Industrial control systems
  4. Automotive electronics
  5. Telecommunications equipment

Detailed and Complete Alternative Models

  1. LM7912: A similar -12V voltage regulator from Texas Instruments.
  2. MC79L12: Another -12V regulator from ON Semiconductor.
  3. UA7912: A -12V regulator manufactured by Fairchild Semiconductor.

These alternative models provide similar functionality and can be used as replacements for the L79L12ABD-R in various applications.

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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de L79L12ABD-R en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of L79L12ABD-R in technical solutions:

  1. Q: What is L79L12ABD-R? A: L79L12ABD-R is a voltage regulator IC that provides a fixed output voltage of -12V.

  2. Q: What is the input voltage range for L79L12ABD-R? A: The input voltage range for L79L12ABD-R is typically between -35V and -15V.

  3. Q: What is the maximum output current of L79L12ABD-R? A: The maximum output current of L79L12ABD-R is 100mA.

  4. Q: Can L79L12ABD-R be used in both AC and DC applications? A: Yes, L79L12ABD-R can be used in both AC and DC applications.

  5. Q: Is L79L12ABD-R suitable for automotive applications? A: No, L79L12ABD-R is not suitable for automotive applications as it operates within a limited temperature range.

  6. Q: Can L79L12ABD-R be used to regulate positive voltages? A: No, L79L12ABD-R is specifically designed to regulate negative voltages.

  7. Q: What is the typical dropout voltage of L79L12ABD-R? A: The typical dropout voltage of L79L12ABD-R is around 2V.

  8. Q: Does L79L12ABD-R require any external components for operation? A: Yes, L79L12ABD-R requires an input capacitor and an output capacitor for stable operation.

  9. Q: Can multiple L79L12ABD-R ICs be connected in parallel to increase the output current? A: No, it is not recommended to connect multiple L79L12ABD-R ICs in parallel as it may cause stability issues.

  10. Q: What are some common applications of L79L12ABD-R? A: L79L12ABD-R is commonly used in audio amplifiers, power supplies, and other electronic circuits that require a regulated -12V voltage source.

Please note that these answers are general and may vary depending on the specific datasheet and application requirements of L79L12ABD-R.