NJM79L05UA

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics:
  • Low dropout voltage
  • Output current up to 100mA
  • Fixed output voltage of -5V
  • Thermal shutdown protection
• Package: TO-92 (3-pin package)
• Essence: Linear voltage regulator
• Packaging/Quantity: Typically sold in reels or tubes containing multiple units

Specifications

• Input Voltage Range: -7V to -35V
• Output Voltage: -5V (fixed)
• Output Current: Up to 100mA
• Dropout Voltage: 1.7V (maximum)
• Quiescent Current: 4mA (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The NJM79L05UA has three pins: 1. Input (VIN): Connects to the input voltage source. 2. Ground (GND): Connected to the ground reference. 3. Output (VOUT): Provides the regulated -5V output.

Functional Features

• Voltage Regulation: The NJM79L05UA regulates the input voltage to a fixed -5V output.
• Low Dropout: It operates with a low dropout voltage, allowing it to regulate even when the input voltage is close to the desired output voltage.
• Thermal Shutdown Protection: The IC includes thermal shutdown protection, which prevents damage due to excessive heat.

Advantages and Disadvantages

Advantages: - Compact and easy to use - Low dropout voltage ensures efficient regulation - Thermal shutdown protection enhances reliability

Disadvantages: - Limited output current capacity (up to 100mA) - Fixed output voltage may not be suitable for all applications

Working Principles

The NJM79L05UA is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It compares the reference voltage (-5V) with the feedback voltage and adjusts the pass transistor accordingly to maintain a stable -5V output.

Detailed Application Field Plans

The NJM79L05UA is commonly used in various electronic devices that require a regulated -5V power supply. Some typical applications include: - Audio amplifiers - Data acquisition systems - Industrial control systems - Battery-powered devices

Detailed and Complete Alternative Models

• LM79L05: A similar voltage regulator from Texas Instruments.
• MC79L05: Another alternative from ON Semiconductor.
• KA79L05: An alternative model from Fairchild Semiconductor.

These alternative models offer similar functionality and can be used as replacements for the NJM79L05UA in various applications.

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