NJR Corporation/NJRC
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NJM78L18UA
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NJM78L18UA

Product Overview

Category

NJM78L18UA belongs to the category of linear voltage regulators.

Use

It is commonly used to regulate and stabilize the output voltage in various electronic circuits.

Characteristics

  • Low dropout voltage
  • High ripple rejection ratio
  • Short-circuit protection
  • Thermal shutdown protection

Package

NJM78L18UA is available in a TO-92 package.

Essence

The essence of NJM78L18UA lies in its ability to provide a stable and regulated output voltage.

Packaging/Quantity

It is typically sold in reels or tubes, with quantities varying depending on the supplier.

Specifications

  • Input Voltage Range: 7V to 30V
  • Output Voltage: 18V
  • Output Current: 100mA
  • Dropout Voltage: 1.7V (max)
  • Ripple Rejection Ratio: 60dB (typ)
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

NJM78L18UA has three pins:

  1. Input (VIN): This pin receives the unregulated input voltage.
  2. Ground (GND): This pin is connected to the ground reference.
  3. Output (VOUT): The regulated output voltage is obtained from this pin.

Functional Features

  • Regulates the output voltage to a fixed value.
  • Provides a stable output even when the input voltage fluctuates.
  • Protects against short-circuits and thermal overload.

Advantages and Disadvantages

Advantages

  • Low dropout voltage ensures efficient regulation.
  • High ripple rejection ratio minimizes noise interference.
  • Short-circuit and thermal shutdown protection enhance reliability.

Disadvantages

  • Limited output current capacity (100mA).
  • Requires an input voltage within the specified range for proper operation.

Working Principles

NJM78L18UA operates based on the principle of linear voltage regulation. It utilizes a series pass transistor to regulate the output voltage. The input voltage is compared to a reference voltage, and the difference is adjusted by the transistor to maintain a constant output voltage.

Detailed Application Field Plans

NJM78L18UA finds applications in various electronic devices and circuits, including:

  1. Power supply units for audio amplifiers.
  2. Battery-powered devices requiring stable voltage levels.
  3. Automotive electronics, such as dashboard displays and lighting systems.
  4. Industrial control systems.
  5. Communication equipment.

Detailed and Complete Alternative Models

Some alternative models that can be used instead of NJM78L18UA include:

  1. LM7805: A popular 5V linear voltage regulator.
  2. LT1084: A high-current adjustable linear regulator.
  3. LM317: A versatile adjustable linear regulator.

These alternatives offer different specifications and features, allowing users to choose the most suitable option for their specific requirements.

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قم بإدراج 10 أسئلة وإجابات شائعة تتعلق بتطبيق NJM78L18UA في الحلول التقنية

Sure! Here are 10 common questions and answers related to the application of NJM78L18UA in technical solutions:

  1. Q: What is NJM78L18UA? A: NJM78L18UA is a voltage regulator IC that provides a fixed output voltage of 18V.

  2. Q: What is the input voltage range for NJM78L18UA? A: The input voltage range for NJM78L18UA is typically between 7V and 35V.

  3. Q: What is the maximum output current of NJM78L18UA? A: The maximum output current of NJM78L18UA is 100mA.

  4. Q: Can NJM78L18UA handle higher input voltages than its output voltage? A: No, NJM78L18UA is not designed to handle input voltages higher than its output voltage (18V).

  5. Q: Is NJM78L18UA suitable for battery-powered applications? A: Yes, NJM78L18UA can be used in battery-powered applications as it has low quiescent current and low dropout voltage.

  6. Q: Does NJM78L18UA require any external components for operation? A: Yes, NJM78L18UA requires input and output capacitors for stability and filtering purposes.

  7. Q: Can NJM78L18UA handle short-circuit conditions? A: Yes, NJM78L18UA has built-in short-circuit protection to prevent damage under such conditions.

  8. Q: Can NJM78L18UA operate in high-temperature environments? A: Yes, NJM78L18UA has a wide operating temperature range of -40°C to +125°C.

  9. Q: Can NJM78L18UA be used in automotive applications? A: Yes, NJM78L18UA is suitable for automotive applications as it meets the necessary standards and has a wide temperature range.

  10. Q: Are there any alternative voltage regulator ICs similar to NJM78L18UA? A: Yes, there are other voltage regulator ICs available from different manufacturers that provide similar functionality, such as LM78L18, MC78L18, etc.

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