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L79L12ACD
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L79L12ACD

Product Overview

  • Category: Integrated Circuit
  • Use: Voltage Regulator
  • Characteristics: Low Dropout, Negative Voltage Regulator
  • Package: TO-252 (DPAK)
  • Essence: Linear Regulator IC
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Input Voltage Range: -35V to -16V
  • Output Voltage: -12V
  • Output Current: 100mA
  • Dropout Voltage: 1.5V (typical)
  • Quiescent Current: 4.5mA (typical)
  • Line Regulation: 0.2% (typical)
  • Load Regulation: 0.4% (typical)
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L79L12ACD has three pins:

  1. Input Pin (IN): Connects to the input voltage source.
  2. Ground Pin (GND): Connected to the ground reference.
  3. Output Pin (OUT): Provides the regulated output voltage.

Functional Features

  • Provides a stable -12V output voltage regardless of input voltage fluctuations.
  • Low dropout voltage ensures efficient regulation even with small input-output voltage differentials.
  • Built-in thermal shutdown protection prevents damage due to excessive temperature.
  • Short-circuit current limiting protects the device from overcurrent conditions.

Advantages and Disadvantages

Advantages: - Compact and easy-to-use package. - Wide operating temperature range allows for various applications. - Low dropout voltage minimizes power dissipation.

Disadvantages: - Limited output current capability (100mA). - Negative voltage regulator, not suitable for positive voltage requirements.

Working Principles

The L79L12ACD is a linear voltage regulator that uses a negative feedback mechanism to maintain a constant -12V output voltage. It consists of a pass transistor, error amplifier, and voltage reference. The error amplifier compares the output voltage with a fixed reference voltage and adjusts the pass transistor accordingly to regulate the output voltage.

Detailed Application Field Plans

The L79L12ACD is commonly used in applications where a stable -12V voltage source is required. Some typical application fields include:

  1. Industrial Control Systems: Provides regulated power for control circuitry.
  2. Automotive Electronics: Used in vehicle electrical systems for various purposes.
  3. Telecommunications: Ensures stable voltage supply for communication equipment.
  4. Audio Amplifiers: Provides a regulated negative voltage for audio amplification circuits.

Detailed and Complete Alternative Models

  • LM7912: Negative voltage regulator with similar specifications.
  • MC79L12: Another negative voltage regulator option.
  • LT1963A-12: High-performance, low dropout negative voltage regulator.

(Note: This list is not exhaustive and other alternative models may exist.)

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技術ソリューションにおける L79L12ACD の適用に関連する 10 件の一般的な質問と回答をリストします。

Sure! Here are 10 common questions and answers related to the application of L79L12ACD in technical solutions:

  1. Q: What is L79L12ACD? A: L79L12ACD is a voltage regulator IC that provides a fixed output voltage of -12V.

  2. Q: What is the purpose of using L79L12ACD in technical solutions? A: L79L12ACD is commonly used to regulate and stabilize the voltage supply in electronic circuits, ensuring a consistent -12V output.

  3. Q: How does L79L12ACD work? A: L79L12ACD operates by taking an input voltage and regulating it down to a stable -12V output voltage, regardless of any fluctuations in the input voltage.

  4. Q: What is the maximum input voltage that L79L12ACD can handle? A: The maximum input voltage for L79L12ACD is typically around -35V.

  5. Q: Can L79L12ACD be used to regulate positive voltages? A: No, L79L12ACD is specifically designed to regulate negative voltages and cannot be used for positive voltage regulation.

  6. Q: What is the maximum current that L79L12ACD can handle? A: The maximum current rating for L79L12ACD is usually around 100mA.

  7. Q: Is L79L12ACD suitable for low-power applications? A: Yes, L79L12ACD is commonly used in low-power applications where a stable -12V voltage supply is required.

  8. Q: Can multiple L79L12ACD ICs be connected in parallel to increase the current capacity? A: Yes, multiple L79L12ACD ICs can be connected in parallel to increase the overall current capacity.

  9. Q: Are there any specific precautions to consider when using L79L12ACD? A: It is important to provide proper heat sinking for L79L12ACD to prevent overheating. Additionally, input and output capacitors may be required for stability.

  10. Q: Where can I find the datasheet for L79L12ACD? A: The datasheet for L79L12ACD can usually be found on the manufacturer's website or through online electronic component distributors.

Please note that the answers provided here are general and may vary depending on the specific application and manufacturer's specifications of L79L12ACD.