L4931CZ120

Product Overview

• Category: Voltage Regulator
• Use: To regulate voltage in electronic circuits
• Characteristics: Low dropout, low quiescent current, high accuracy
• Package: TO-92 (Through-Hole)
• Essence: Linear voltage regulator
• Packaging/Quantity: Available in reels of 2,500 units

Specifications

• Input Voltage Range: 4.4V to 26V
• Output Voltage: 1.2V
• Output Current: Up to 100mA
• Dropout Voltage: 0.6V at 100mA
• Quiescent Current: 5mA
• Line Regulation: 0.04%/V
• Load Regulation: 0.1%/mA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The L4931CZ120 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 output voltage.

Functional Features

• Low Dropout: The L4931CZ120 has a low dropout voltage, allowing it to regulate voltage even when the input voltage is close to the desired output voltage.
• Low Quiescent Current: The regulator consumes minimal current when there is no load, reducing power consumption.
• High Accuracy: It provides a highly accurate and stable output voltage, ensuring precise voltage regulation in electronic circuits.

Advantages and Disadvantages

Advantages: - Low dropout voltage enables efficient voltage regulation. - Low quiescent current minimizes power consumption. - High accuracy ensures precise voltage regulation.

Disadvantages: - Limited output current capacity (up to 100mA). - Not suitable for applications requiring higher output voltages.

Working Principles

The L4931CZ120 is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the output voltage with a reference voltage and adjusting the pass transistor accordingly. When the input voltage exceeds the desired output voltage, the pass transistor reduces the voltage drop across it, maintaining a stable output voltage.

Detailed Application Field Plans

The L4931CZ120 is commonly used in various electronic devices and circuits, including:

1. Battery-powered devices: Provides regulated voltage for microcontrollers, sensors, and other low-power components.
2. Automotive electronics: Ensures stable voltage supply for automotive control units, sensors, and lighting systems.
3. Industrial automation: Used in PLCs (Programmable Logic Controllers), motor control circuits, and power supplies.
4. Consumer electronics: Regulates voltage in audio/video equipment, portable devices, and home appliances.

Detailed and Complete Alternative Models

1. LM1117-3.3: A similar voltage regulator with an output voltage of 3.3V and higher output current capacity.
2. LT1763: Offers adjustable output voltage and lower dropout voltage compared to L4931CZ120.
3. LM7805: A popular linear voltage regulator with a fixed 5V output voltage and higher output current capability.

These alternative models provide different specifications and features, allowing users to choose the most suitable option for their specific application requirements.

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