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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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van AN79L20M in technische oplossingen

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.