NJM78L12L2A

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: Low dropout voltage, high ripple rejection, compact size
• Package: TO-92
• Essence: Linear voltage regulator
• Packaging/Quantity: Bulk packaging, 1000 units per reel

Specifications

• Input Voltage Range: 14V to 35V
• Output Voltage: 12V
• Output Current: 100mA
• Dropout Voltage: 1.7V (typical)
• Ripple Rejection Ratio: 60dB (typical)
• Quiescent Current: 5mA (typical)

Detailed Pin Configuration

The NJM78L12L2A 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

• Low dropout voltage: The NJM78L12L2A can regulate the output voltage even when the input voltage is only slightly higher than the desired output voltage.
• High ripple rejection: It effectively filters out noise and ripple present in the input voltage, providing a clean and stable output.
• Compact size: The TO-92 package makes it suitable for applications with limited space.

Advantages and Disadvantages

Advantages: - Low dropout voltage allows for efficient regulation. - High ripple rejection ensures a stable output. - Compact size enables use in space-constrained designs.

Disadvantages: - Limited output current capability (100mA). - Requires an input voltage range of 14V to 35V.

Working Principles

The NJM78L12L2A is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It compares the output voltage to a reference voltage and adjusts the pass transistor accordingly to maintain a constant output voltage. The dropout voltage is minimized by using a low resistance pass transistor.

Detailed Application Field Plans

The NJM78L12L2A is commonly used in various electronic devices and applications, including:

1. Power supplies for microcontrollers and other low-power digital circuits.
2. Battery-powered devices requiring a stable 12V supply.
3. Automotive electronics, such as dashboard displays and audio systems.
4. Industrial control systems and instrumentation.
5. Consumer electronics, such as portable audio players and small appliances.

Detailed and Complete Alternative Models

1. LM78L12: Similar specifications and pin configuration, available in different package options.
2. MC78L12: Equivalent performance with slightly different pin configuration, available in various package options.
3. UA78L12: Comparable characteristics and pin configuration, offered in different package options.

These alternative models provide similar functionality and can be used as substitutes for the NJM78L12L2A in various applications.

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