STMicroelectronics
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L79L15ACZ
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L79L15ACZ

Product Overview

  • Category: Integrated Circuit
  • Use: Voltage Regulator
  • Characteristics: Low Dropout, Negative Voltage Regulator
  • Package: TO-220
  • Essence: Linear Regulator IC
  • Packaging/Quantity: Tube Packaging, 50 pieces per tube

Specifications

  • Input Voltage Range: -35V to -17V
  • Output Voltage: -15V
  • Output Current: 100mA
  • Dropout Voltage: 1.7V (typical)
  • Line Regulation: 0.2% (typical)
  • Load Regulation: 0.4% (typical)
  • Quiescent Current: 5mA (typical)

Detailed Pin Configuration

The L79L15ACZ 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 output voltage.

Functional Features

  • Voltage Regulation: The L79L15ACZ regulates the output voltage to a constant -15V, regardless of input voltage fluctuations.
  • Low Dropout: With a dropout voltage of only 1.7V, this regulator can operate with a small voltage difference between the input and output.
  • Short Circuit Protection: The IC includes built-in protection against short circuits, preventing damage to the device.
  • Thermal Overload Protection: The L79L15ACZ is designed to shut down in case of excessive temperature, protecting itself from overheating.

Advantages and Disadvantages

Advantages: - Simple and easy to use. - Reliable voltage regulation. - Built-in protection features. - Suitable for low-power applications.

Disadvantages: - Limited output current capability. - Requires external capacitors for stability.

Working Principles

The L79L15ACZ is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It compares the reference voltage with the feedback voltage and adjusts the pass transistor accordingly to maintain a constant -15V output.

Detailed Application Field Plans

The L79L15ACZ is commonly used in various electronic devices and applications, including:

  1. Power Supplies: It can be used as a voltage regulator in power supply circuits to provide a stable -15V output.
  2. Audio Amplifiers: The IC can be employed in audio amplifiers to generate a regulated negative voltage required for biasing or powering specific components.
  3. Instrumentation: It finds application in instrumentation circuits where a precise and stable negative voltage is necessary.

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the L79L15ACZ are:

  1. LM337: Negative voltage regulator with adjustable output voltage.
  2. LT1054: Negative voltage converter capable of generating negative voltages from positive input sources.
  3. ICL7660: Voltage converter that can generate both positive and negative voltages from a single positive input source.

These alternative models offer similar functionality but may have different specifications and package options.

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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van L79L15ACZ in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of L79L15ACZ in technical solutions:

  1. Q: What is L79L15ACZ? A: L79L15ACZ is a voltage regulator IC that provides a fixed output voltage of -15V.

  2. Q: What is the input voltage range for L79L15ACZ? A: The input voltage range for L79L15ACZ is typically between -35V and -20V.

  3. Q: What is the maximum output current of L79L15ACZ? A: The maximum output current of L79L15ACZ is 100mA.

  4. Q: Can L79L15ACZ be used in both AC and DC applications? A: Yes, L79L15ACZ can be used in both AC and DC applications.

  5. Q: Is L79L15ACZ suitable for low-power applications? A: Yes, L79L15ACZ is commonly used in low-power applications where a stable -15V supply is required.

  6. Q: Does L79L15ACZ require any external components for operation? A: Yes, L79L15ACZ requires at least two external capacitors for stability and filtering purposes.

  7. Q: What is the typical dropout voltage of L79L15ACZ? A: The typical dropout voltage of L79L15ACZ is around 2V.

  8. Q: Can L79L15ACZ handle short-circuit conditions? A: No, L79L15ACZ does not have built-in short-circuit protection. External measures should be taken to prevent short-circuits.

  9. Q: Can L79L15ACZ operate in high-temperature environments? A: Yes, L79L15ACZ has a wide operating temperature range of -40°C to 125°C.

  10. Q: What are some common applications of L79L15ACZ? A: L79L15ACZ is commonly used in audio amplifiers, industrial control systems, and other electronic devices that require a stable -15V supply.

Please note that the answers provided here are general and may vary depending on specific datasheet specifications and application requirements.