NJM78L15UA-TE1

Product Overview

Category

NJM78L15UA-TE1 belongs to the category of linear voltage regulators.

Use

It is primarily used for regulating and stabilizing voltage in electronic circuits.

Characteristics

• Input Voltage Range: 17V to 30V
• Output Voltage: +15V
• Maximum Output Current: 100mA
• Low Dropout Voltage: 0.5V (typical)
• Thermal Shutdown Protection
• Short Circuit Protection
• Small Package Size: SOT-89

Packaging/Quantity

The NJM78L15UA-TE1 is typically available in tape and reel packaging, with a quantity of 3000 units per reel.

Specifications

• Input Voltage Range: 17V to 30V
• Output Voltage: +15V
• Output Current: 100mA (maximum)
• Dropout Voltage: 0.5V (typical)
• Line Regulation: ±0.2% (typical)
• Load Regulation: ±0.4% (typical)
• Quiescent Current: 5mA (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The NJM78L15UA-TE1 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 NJM78L15UA-TE1 ensures a stable output voltage of +15V, regardless of variations in the input voltage.
• Thermal Shutdown Protection: In case of excessive temperature, the regulator shuts down to prevent damage.
• Short Circuit Protection: The device automatically shuts down if a short circuit occurs, protecting the circuitry.

Advantages and Disadvantages

Advantages

• Compact package size allows for space-saving designs.
• Low dropout voltage minimizes power dissipation.
• Thermal and short circuit protection enhance reliability.

Disadvantages

• Limited output current capability (maximum 100mA).
• Input voltage range is restricted to 17V to 30V.

Working Principles

The NJM78L15UA-TE1 operates based on the principle of linear voltage regulation. It uses a series pass transistor to regulate the output voltage. The input voltage is stepped down to the desired output voltage using a voltage divider network. The regulator continuously adjusts the resistance of the series pass transistor to maintain a constant output voltage, compensating for any fluctuations in the input voltage.

Detailed Application Field Plans

The NJM78L15UA-TE1 finds applications in various electronic circuits where a stable +15V voltage supply is required. Some common application areas include:

1. Power Supply Units: It can be used as a part of power supply units to provide regulated voltage to other components.
2. Audio Amplifiers: The regulator ensures a stable power source for audio amplifiers, preventing distortion and noise.
3. Instrumentation Systems: It is suitable for powering analog and digital circuits in instrumentation systems.
4. Automotive Electronics: The NJM78L15UA-TE1 can be utilized in automotive electronics for voltage regulation purposes.

Detailed and Complete Alternative Models

1. LM7815: A widely used alternative with similar specifications and pin configuration.
2. MC78L15: Another popular choice offering comparable performance characteristics.
3. UA7815: A reliable alternative from Texas Instruments, commonly used in various applications.

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