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NJM79L18L2A
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NJM79L18L2A

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Voltage Regulator
  • Characteristics: Low Dropout, Negative Voltage Regulator
  • Package: TO-92 (Through-Hole)
  • Essence: Linear Regulator IC
  • Packaging/Quantity: Bulk Packaging, Available in Reel or Tube Packaging

Specifications

  • Input Voltage Range: -35V to -8V
  • Output Voltage: -18V
  • Output Current: 100mA
  • Dropout Voltage: 1.7V (typical)
  • Quiescent Current: 5mA (typical)
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The NJM79L18L2A has a standard three-pin configuration:

  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 NJM79L18L2A provides a stable and regulated -18V output voltage.
  • Low Dropout: With a dropout voltage of only 1.7V, it can regulate the output voltage even when the input voltage is close to the desired output voltage.
  • Short Circuit Protection: The IC incorporates short circuit protection, preventing damage to the device in case of a short circuit on the output side.
  • Thermal Shutdown: It includes a thermal shutdown feature that protects the IC from overheating by shutting down the regulator if the temperature exceeds a safe limit.

Advantages and Disadvantages

Advantages: - Compact and easy-to-use package - Low dropout voltage ensures efficient voltage regulation - Short circuit protection enhances device reliability - Thermal shutdown feature protects against overheating

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

Working Principles

The NJM79L18L2A is a linear voltage regulator that uses a negative feedback mechanism to maintain a stable -18V output voltage. It operates by comparing the output voltage with a reference voltage and adjusting the internal pass transistor to regulate the output voltage at the desired level.

Detailed Application Field Plans

The NJM79L18L2A can be used in various applications where a stable -18V voltage source is required. Some common application fields include:

  1. Audio Amplifiers: Provides a regulated negative supply voltage for audio amplifiers.
  2. Instrumentation: Used in precision measurement instruments that require a stable negative voltage reference.
  3. Industrial Control Systems: Suitable for industrial control systems that utilize negative voltage rails.
  4. Automotive Electronics: Can be employed in automotive electronic circuits requiring a regulated negative voltage.

Detailed and Complete Alternative Models

  1. LM7918: Negative voltage regulator with similar specifications and package.
  2. MC79L18: Another negative voltage regulator with comparable characteristics.
  3. L7918CV: Negative voltage regulator with higher output current capability.

These alternative models can be considered as substitutes for the NJM79L18L2A based on specific requirements and availability.

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기술 솔루션에 NJM79L18L2A 적용과 관련된 10가지 일반적인 질문과 답변을 나열하세요.

Sure! Here are 10 common questions and answers related to the application of NJM79L18L2A in technical solutions:

  1. Q: What is NJM79L18L2A? A: NJM79L18L2A is a voltage regulator IC that provides a fixed output voltage of -18V.

  2. Q: What is the input voltage range for NJM79L18L2A? A: The input voltage range for NJM79L18L2A is typically between -35V and -5V.

  3. Q: What is the maximum output current of NJM79L18L2A? A: The maximum output current of NJM79L18L2A is 100mA.

  4. Q: Can NJM79L18L2A be used in both AC and DC applications? A: Yes, NJM79L18L2A can be used in both AC and DC applications.

  5. Q: Is NJM79L18L2A suitable for battery-powered devices? A: Yes, NJM79L18L2A is suitable for battery-powered devices as it has low quiescent current consumption.

  6. Q: Does NJM79L18L2A require any external components for operation? A: Yes, NJM79L18L2A requires input and output capacitors for stable operation.

  7. Q: Can NJM79L18L2A handle short-circuit conditions? A: Yes, NJM79L18L2A has built-in protection features that allow it to handle short-circuit conditions.

  8. Q: What is the operating temperature range of NJM79L18L2A? A: The operating temperature range of NJM79L18L2A is typically between -40°C and 85°C.

  9. Q: Can NJM79L18L2A be used in automotive applications? A: Yes, NJM79L18L2A is suitable for automotive applications as it meets the required standards.

  10. Q: Are there any alternative voltage regulator ICs similar to NJM79L18L2A? A: Yes, some alternative voltage regulator ICs similar to NJM79L18L2A include LM79L18, MC79L18, and UA79L18.

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