L4931CV50

Product Overview

• Category: Voltage Regulator
• Use: To regulate voltage in electronic circuits
• Characteristics: Low dropout, low quiescent current, high accuracy
• Package: TO-220, DPAK, SOT-89
• Essence: Linear voltage regulator
• Packaging/Quantity: Tape and reel, 2,500 units per reel

Specifications

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

Detailed Pin Configuration

The L4931CV50 has three pins:

1. Input (IN): Connects to the input voltage source.
2. Ground (GND): Connected to the ground reference.
3. Output (OUT): Provides the regulated output voltage.

Functional Features

• Low Dropout: The L4931CV50 has a low dropout voltage, allowing it to regulate the output voltage even when the input voltage is close to the desired output voltage.
• Low Quiescent Current: The device consumes very little current when in standby mode, reducing power consumption.
• High Accuracy: The voltage regulator provides a highly accurate output voltage, ensuring stable operation of the connected circuitry.

Advantages and Disadvantages

Advantages: - Low dropout voltage enables efficient regulation. - Low quiescent current reduces power consumption. - High accuracy ensures stable circuit operation.

Disadvantages: - Limited output current capability (up to 100mA). - May require additional heat sinking for higher power applications.

Working Principles

The L4931CV50 is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a stable output voltage. The dropout voltage is minimized by using a low resistance pass element.

Detailed Application Field Plans

The L4931CV50 is commonly used in various electronic devices, including:

1. Battery-Powered Devices: Provides a stable 5V supply for microcontrollers, sensors, and other low-power components.
2. Automotive Electronics: Regulates voltage for automotive systems such as infotainment systems, lighting controls, and engine management units.
3. Industrial Control Systems: Ensures stable voltage supply for PLCs, motor drives, and control panels.
4. Telecommunications Equipment: Used in routers, switches, and communication modules to maintain a reliable power source.

Detailed and Complete Alternative Models

1. LM1117: Similar voltage regulator with adjustable output voltage.
2. LT1086: Higher current capability with adjustable output voltage.
3. TS2950: Low dropout voltage regulator with fixed output voltage options.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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