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AN79L18M
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AN79L18M

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Voltage Regulator
  • Characteristics: Low Dropout, Fixed Output Voltage
  • Package: TO-252, 3-Pin
  • Essence: AN79L18M is a voltage regulator IC that provides a fixed output voltage of -18V with low dropout characteristics.
  • Packaging/Quantity: Available in reels or tubes, quantity varies based on manufacturer.

Specifications

  • Input Voltage Range: -20V to -35V
  • Output Voltage: -18V
  • Output Current: Up to 100mA
  • Dropout Voltage: 1.2V (typical)
  • Operating Temperature Range: -40°C to +125°C
  • Line Regulation: ±0.5% (typical)
  • Load Regulation: ±1% (typical)

Detailed Pin Configuration

AN79L18M has a standard 3-pin configuration:

  1. Input Pin (VIN): Connects to the input voltage source (-20V to -35V).
  2. Ground Pin (GND): Connected to the ground reference.
  3. Output Pin (VOUT): Provides the regulated output voltage of -18V.

Functional Features

  • Voltage Regulation: AN79L18M ensures a stable -18V output voltage even with varying input voltages.
  • Low Dropout: The IC has a low dropout voltage of 1.2V, allowing it to regulate the output voltage efficiently.
  • Short Circuit Protection: AN79L18M includes built-in protection against short circuits, preventing damage to the IC and connected components.
  • Thermal Shutdown: The IC incorporates thermal shutdown protection to prevent overheating during prolonged operation.

Advantages and Disadvantages

Advantages: - Provides a fixed -18V output voltage. - Low dropout voltage ensures efficient regulation. - Built-in short circuit protection. - Thermal shutdown feature prevents overheating.

Disadvantages: - Limited output current capability (up to 100mA). - Requires an input voltage within the specified range (-20V to -35V).

Working Principles

AN79L18M is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It compares the reference voltage (-18V) with the feedback voltage from the output, adjusting the pass transistor's resistance to maintain a stable -18V output.

Detailed Application Field Plans

AN79L18M finds applications in various electronic devices and systems where a regulated -18V voltage is required. Some common application fields include:

  1. Audio Amplifiers: AN79L18M can be used to provide a stable -18V supply voltage for audio amplifiers, ensuring consistent performance.
  2. Industrial Control Systems: The IC can regulate the voltage in control systems, providing a reliable power source for sensors, actuators, and other components.
  3. Test and Measurement Equipment: AN79L18M is suitable for powering analog circuits in test and measurement equipment, maintaining accurate measurements.

Detailed and Complete Alternative Models

  1. LM7918: Similar to AN79L18M, this IC provides a fixed -18V output voltage with low dropout characteristics.
  2. MC79L18: Another alternative with the same -18V output voltage and low dropout features.
  3. UA79L18: This IC also offers a fixed -18V output voltage and is compatible with AN79L18M.

These alternative models can be considered based on availability, pricing, and specific requirements of the application.

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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de AN79L18M en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of AN79L18M in technical solutions:

  1. Q: What is AN79L18M? A: AN79L18M is a voltage regulator integrated circuit (IC) that provides a fixed output voltage of -18V.

  2. Q: What is the input voltage range for AN79L18M? A: The input voltage range for AN79L18M is typically between -20V and -35V.

  3. Q: What is the maximum output current of AN79L18M? A: The maximum output current of AN79L18M is around 100mA.

  4. Q: Can AN79L18M be used in both AC and DC applications? A: Yes, AN79L18M can be used in both AC and DC applications as long as the input voltage falls within the specified range.

  5. Q: Is AN79L18M suitable for low-power applications? A: Yes, AN79L18M is commonly used in low-power applications where a stable -18V output voltage is required.

  6. Q: Does AN79L18M require any external components for operation? A: Yes, AN79L18M requires a few external components such as capacitors for stability and protection diodes for reliability.

  7. Q: Can AN79L18M handle short-circuit conditions? A: AN79L18M has built-in short-circuit protection, which allows it to handle short-circuit conditions without damage.

  8. Q: What is the operating temperature range of AN79L18M? A: The operating temperature range of AN79L18M is typically between -40°C and +125°C.

  9. Q: Can AN79L18M be used in automotive applications? A: Yes, AN79L18M is suitable for automotive applications as it can withstand the temperature and voltage variations encountered in vehicles.

  10. Q: Are there any alternatives to AN79L18M for -18V voltage regulation? A: Yes, there are other voltage regulator ICs available in the market that provide a fixed -18V output, such as LM7918 or LT1963-1.8.