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L79L12ACZ-TR
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L79L12ACZ-TR

Product Overview

Category

The L79L12ACZ-TR belongs to the category of linear voltage regulators.

Use

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

Characteristics

  • Linear voltage regulator
  • Fixed output voltage of -12V
  • Low dropout voltage
  • High ripple rejection ratio
  • Short-circuit protection
  • Thermal overload protection

Package

The L79L12ACZ-TR comes in a TO-92 package, which is a small, three-lead plastic package.

Essence

The essence of the L79L12ACZ-TR is to provide a stable and regulated -12V output voltage for various electronic applications.

Packaging/Quantity

The L79L12ACZ-TR is typically packaged in reels or tubes, with quantities varying depending on the manufacturer's specifications.

Specifications

  • Output Voltage: -12V
  • Input Voltage Range: -14.5V to -35V
  • Dropout Voltage: 2V (max)
  • Output Current: 100mA
  • Ripple Rejection Ratio: 62dB (typ)
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L79L12ACZ-TR 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 -12V output voltage.

Functional Features

  • Regulates and stabilizes the output voltage to -12V.
  • Provides short-circuit protection, preventing damage to the circuit in case of a fault.
  • Offers thermal overload protection, ensuring safe operation even under high temperature conditions.
  • Maintains a high ripple rejection ratio, minimizing noise and interference in the output voltage.

Advantages and Disadvantages

Advantages

  • Compact TO-92 package allows for easy integration into various circuit designs.
  • Low dropout voltage ensures efficient power conversion.
  • High ripple rejection ratio provides a clean and stable output voltage.

Disadvantages

  • Limited output current of 100mA may not be suitable for high-power applications.
  • Fixed output voltage of -12V may not be adjustable to meet specific requirements.

Working Principles

The L79L12ACZ-TR operates based on the principle of linear voltage regulation. It uses a series pass transistor to regulate the output voltage by adjusting the current flow through it. The internal circuitry compares the output voltage with a reference voltage, and any deviation is corrected by adjusting the pass transistor's resistance. This feedback mechanism ensures a constant -12V output voltage regardless of input variations.

Detailed Application Field Plans

The L79L12ACZ-TR finds applications in various electronic systems, including:

  1. Power supply circuits: Provides regulated -12V voltage for powering analog and digital components.
  2. Audio amplifiers: Stabilizes the negative power supply rail for audio amplification circuits.
  3. Instrumentation systems: Ensures a stable voltage reference for accurate measurements.
  4. Industrial control systems: Regulates voltage for control circuitry and sensors.
  5. Automotive electronics: Used in automotive applications requiring a regulated -12V supply.

Detailed and Complete Alternative Models

  1. LM7912: Similar linear voltage regulator with -12V fixed output voltage.
  2. MC79L12: Another -12V linear voltage regulator with similar specifications.
  3. LT1963A-12: Adjustable linear voltage regulator capable of providing -12V output voltage.

These alternative models offer similar functionality and can be used as substitutes for the L79L12ACZ-TR depending on specific requirements.

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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de L79L12ACZ-TR en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of L79L12ACZ-TR in technical solutions:

  1. Q: What is L79L12ACZ-TR? A: L79L12ACZ-TR is a voltage regulator IC that provides a fixed output voltage of -12V.

  2. Q: What is the input voltage range for L79L12ACZ-TR? A: The input voltage range for L79L12ACZ-TR is typically between -35V and -15V.

  3. Q: What is the maximum output current of L79L12ACZ-TR? A: The maximum output current of L79L12ACZ-TR is 100mA.

  4. Q: Can L79L12ACZ-TR be used in both AC and DC applications? A: Yes, L79L12ACZ-TR can be used in both AC and DC applications.

  5. Q: Is L79L12ACZ-TR suitable for automotive applications? A: No, L79L12ACZ-TR is not suitable for automotive applications as it has limited temperature range and other specifications.

  6. Q: Does L79L12ACZ-TR require any external components for operation? A: Yes, L79L12ACZ-TR requires at least two external capacitors for proper stability and filtering.

  7. Q: What is the typical dropout voltage of L79L12ACZ-TR? A: The typical dropout voltage of L79L12ACZ-TR is around 2V.

  8. Q: Can L79L12ACZ-TR handle short-circuit conditions? A: Yes, L79L12ACZ-TR has built-in short-circuit protection to prevent damage under such conditions.

  9. Q: What is the operating temperature range for L79L12ACZ-TR? A: The operating temperature range for L79L12ACZ-TR is typically between 0°C and 125°C.

  10. Q: Can L79L12ACZ-TR be used in battery-powered applications? A: Yes, L79L12ACZ-TR can be used in battery-powered applications as it provides a stable -12V output voltage.

Please note that these answers are general and may vary depending on the specific datasheet and manufacturer's specifications of L79L12ACZ-TR.