NJM78L09A

Product Overview

• Category: Linear Voltage Regulator
• Use: Provides a stable output voltage of +9V
• Characteristics: Low dropout voltage, high ripple rejection ratio, and low quiescent current
• Package: TO-92 package
• Essence: Integrated circuit designed to regulate voltage
• Packaging/Quantity: Available in reels or tubes, quantity varies depending on supplier

Specifications

• Input Voltage Range: 11V - 35V
• Output Voltage: +9V ±5%
• Output Current: 100mA (maximum)
• Dropout Voltage: 1.2V (typical)
• Quiescent Current: 4.5mA (typical)
• Ripple Rejection Ratio: 60dB (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The NJM78L09A 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 output voltage regardless of input voltage fluctuations.
• Low dropout voltage ensures efficient regulation even with small input-output differentials.
• High ripple rejection ratio minimizes the impact of AC voltage ripples on the output.
• Low quiescent current reduces power consumption when the load is minimal.

Advantages and Disadvantages

Advantages: - Compact TO-92 package allows for easy integration into various electronic circuits. - Wide operating temperature range makes it suitable for harsh environments. - Low dropout voltage enables efficient regulation even with low input-output differentials.

Disadvantages: - Limited output current capacity (100mA maximum). - Requires external capacitors for stability and noise reduction.

Working Principles

The NJM78L09A is a linear voltage regulator that utilizes a series pass transistor to regulate the output voltage. It compares the reference voltage with the feedback voltage and adjusts the pass transistor accordingly to maintain a stable output voltage of +9V.

Detailed Application Field Plans

The NJM78L09A is commonly used in various electronic devices, including but not limited to: - Power supplies for audio amplifiers - Battery-powered devices - Voltage regulators for microcontrollers and other digital circuits - Automotive electronics - Industrial control systems

Detailed and Complete Alternative Models

1. LM7809: Similar specifications and pin configuration, available in different packages.
2. MC78L09: Comparable performance, available in TO-92 package.
3. UA78L09: Equivalent functionality, offered in various package options.

These alternative models can be considered based on specific requirements and availability.

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