Panasonic Electronic Components
La imagen puede ser una representación.
Consulte las especificaciones para obtener detalles del producto.
AN79L20
Ver Detalle Hojas de datos

AN79L20

Product Overview

Category

AN79L20 belongs to the category of linear voltage regulators.

Use

It is primarily used for regulating and stabilizing voltage in electronic circuits.

Characteristics

  • AN79L20 is a low-power, negative voltage regulator.
  • It operates with an input voltage range of -35V to -8V.
  • The output voltage is fixed at -20V.
  • It has a maximum output current of 100mA.
  • AN79L20 is designed to provide a stable and reliable power supply for various electronic devices.

Package

The AN79L20 regulator comes in a TO-92 package, which is a small, three-pin package commonly used for integrated circuits.

Essence

The essence of AN79L20 lies in its ability to regulate and maintain a constant -20V output voltage, ensuring the stability and reliability of electronic circuits.

Packaging/Quantity

AN79L20 is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the manufacturer and supplier.

Specifications

  • Input Voltage Range: -35V to -8V
  • Output Voltage: -20V
  • Maximum Output Current: 100mA
  • Package Type: TO-92
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

AN79L20 has three pins:

  1. Input (VIN): This pin is connected to the input voltage source.
  2. Ground (GND): This pin is connected to the ground reference.
  3. Output (VOUT): This pin provides the regulated -20V output voltage.

Functional Features

  • Voltage Regulation: AN79L20 ensures a stable -20V output voltage regardless of variations in the input voltage.
  • Overcurrent Protection: It incorporates overcurrent protection to prevent damage to the circuitry in case of excessive load.
  • Thermal Shutdown: AN79L20 includes a thermal shutdown feature that protects the device from overheating.

Advantages and Disadvantages

Advantages

  • Compact Size: The TO-92 package makes AN79L20 suitable for space-constrained applications.
  • Easy to Use: It requires minimal external components, simplifying circuit design.
  • Cost-Effective: AN79L20 provides reliable voltage regulation at an affordable price.

Disadvantages

  • Limited Output Current: With a maximum output current of 100mA, AN79L20 may not be suitable for high-power applications.
  • Negative Voltage Only: It can only regulate negative voltages; positive voltage regulation is not supported.

Working Principles

AN79L20 operates based on the principle of linear voltage regulation. It utilizes a series pass transistor to maintain a constant -20V output voltage. The internal circuitry compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to regulate the output voltage.

Detailed Application Field Plans

AN79L20 finds applications in various electronic devices and circuits, including but not limited to: - Audio Amplifiers - Power Supplies - Instrumentation Systems - Industrial Control Systems - Automotive Electronics

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to AN79L20 include: - LM337: A negative voltage regulator with adjustable output voltage. - MC79L20: A fixed -20V negative voltage regulator in a different package. - LT1963: A low dropout (LDO) negative voltage regulator with higher output current capability.

These alternative models can be considered based on specific requirements and compatibility with the application.

Word count: 489 words

Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de AN79L20 en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of AN79L20 in technical solutions:

  1. Q: What is AN79L20? A: AN79L20 is a voltage regulator IC (integrated circuit) that provides a fixed negative voltage output.

  2. Q: What is the input voltage range for AN79L20? A: The input voltage range for AN79L20 is typically between -35V and -8V.

  3. Q: What is the output voltage of AN79L20? A: The output voltage of AN79L20 is fixed at -20V.

  4. Q: What is the maximum current AN79L20 can handle? A: AN79L20 can handle a maximum current of 100mA.

  5. Q: Can AN79L20 be used in both AC and DC applications? A: Yes, AN79L20 can be used in both AC and DC applications.

  6. Q: Is AN79L20 suitable for low-power devices? A: Yes, AN79L20 is commonly used in low-power devices such as sensors, microcontrollers, and audio amplifiers.

  7. Q: Does AN79L20 require any external components for operation? A: Yes, AN79L20 requires a few external components like capacitors for stability and filtering.

  8. Q: Can AN79L20 handle overvoltage protection? A: No, AN79L20 does not have built-in overvoltage protection. External protection circuits may be required.

  9. Q: What is the operating temperature range for AN79L20? A: The operating temperature range for AN79L20 is typically between -40°C and +125°C.

  10. Q: Are there any recommended alternatives to AN79L20? A: Yes, some alternatives to AN79L20 include LM79L20, MC79L20, and UA79L20, which are similar negative voltage regulators.

Please note that the answers provided here are general and may vary depending on the specific datasheet and manufacturer's recommendations for AN79L20.