Panasonic Electronic Components
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AN79L20M
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AN79L20M

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Voltage Regulator
  • Characteristics: Low Dropout, Negative Voltage Regulator
  • Package: TO-220
  • Essence: AN79L20M is a negative voltage regulator IC that provides a regulated output voltage of -20V.
  • Packaging/Quantity: Available in tape and reel packaging with 1000 units per reel.

Specifications

  • Input Voltage Range: -25V to -10V
  • Output Voltage: -20V
  • Output Current: 100mA
  • Dropout Voltage: 1.7V (typical)
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

AN79L20M has three pins:

  1. Input Pin (VIN): Connects to the input voltage source.
  2. Ground Pin (GND): Connected to the ground reference.
  3. Output Pin (VOUT): Provides the regulated -20V output voltage.

Functional Features

  • Regulated Output: AN79L20M ensures a stable -20V output voltage even when the input voltage varies.
  • Low Dropout Voltage: The dropout voltage of 1.7V allows the IC to operate efficiently even with low input-output voltage differentials.
  • Short Circuit Protection: The IC includes built-in protection against short circuits, preventing damage to the device.
  • Thermal Shutdown: AN79L20M incorporates thermal shutdown circuitry to protect itself from overheating.

Advantages and Disadvantages

Advantages

  • Compact and easy-to-use voltage regulator solution.
  • Wide operating temperature range enables usage in various environments.
  • Built-in short circuit protection enhances reliability.
  • Low dropout voltage minimizes power dissipation.

Disadvantages

  • Limited output current capability (100mA).
  • Negative voltage output restricts its application to specific scenarios.

Working Principles

AN79L20M utilizes a negative feedback control mechanism to maintain a constant -20V output voltage. It compares the output voltage with a reference voltage and adjusts the internal circuitry accordingly to regulate the output.

Detailed Application Field Plans

AN79L20M finds applications in various electronic devices where a stable -20V voltage supply is required. Some common application areas include:

  1. Audio Amplifiers
  2. Industrial Control Systems
  3. Test and Measurement Equipment
  4. Communication Devices
  5. Automotive Electronics

Detailed and Complete Alternative Models

  1. LM337: Negative voltage regulator IC with adjustable output voltage.
  2. MC79L20: Fixed -20V voltage regulator IC in TO-220 package.
  3. LT1963A: Low dropout, negative voltage regulator with higher output current capability.

These alternative models offer similar functionality and can be used as substitutes for AN79L20M depending on specific requirements.

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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de AN79L20M en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of AN79L20M in technical solutions:

  1. Question: What is AN79L20M?
    - Answer: AN79L20M is a voltage regulator integrated circuit (IC) that provides a fixed output voltage of -20V.

  2. Question: What is the input voltage range for AN79L20M?
    - Answer: The input voltage range for AN79L20M is typically between -35V and -8V.

  3. Question: What is the maximum output current of AN79L20M?
    - Answer: The maximum output current of AN79L20M is 100mA.

  4. Question: Can AN79L20M be used in both AC and DC applications?
    - Answer: Yes, AN79L20M can be used in both AC and DC applications as long as the input voltage falls within the specified range.

  5. Question: Is AN79L20M suitable for battery-powered applications?
    - Answer: Yes, AN79L20M can be used in battery-powered applications as it has low quiescent current and operates efficiently with low power consumption.

  6. Question: Does AN79L20M require any external components for operation?
    - Answer: Yes, AN79L20M requires a minimum of two external capacitors for stability and proper operation.

  7. Question: What is the thermal shutdown feature of AN79L20M?
    - Answer: AN79L20M has built-in thermal shutdown protection that prevents the IC from overheating by shutting down when the temperature exceeds a certain threshold.

  8. Question: Can AN79L20M handle short-circuit conditions?
    - Answer: AN79L20M has built-in short-circuit protection, which allows it to handle short-circuit conditions without damaging the IC.

  9. Question: What is the typical dropout voltage of AN79L20M?
    - Answer: The typical dropout voltage of AN79L20M is around 2V, meaning the input voltage must be at least 2V higher than the desired output voltage for proper regulation.

  10. Question: Can AN79L20M be used in automotive applications?
    - Answer: Yes, AN79L20M can be used in automotive applications as it meets the necessary requirements for automotive electronics and has a wide operating temperature range.

Please note that these answers are general and may vary depending on the specific datasheet and application requirements of AN79L20M.