L4931CDT120

Product Overview

• Category: Voltage Regulator
• Use: Provides a stable output voltage for electronic circuits
• Characteristics: Low dropout voltage, high accuracy, low quiescent current
• Package: DPAK (TO-252), surface mount package
• Essence: Linear voltage regulator
• Packaging/Quantity: Tape and reel packaging, 2500 units per reel

Specifications

• Input Voltage Range: 4.4V to 20V
• Output Voltage: 1.2V
• 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 L4931CDT120 has three pins:

1. Input Pin (VIN): Connects to the input voltage source.
2. Ground Pin (GND): Connected to the ground reference of the circuit.
3. Output Pin (VOUT): Provides the regulated output voltage.

Functional Features

• Low Dropout Voltage: The L4931CDT120 has a low dropout voltage, allowing it to regulate the output voltage even when the input voltage is close to the desired output voltage.
• High Accuracy: This voltage regulator provides a highly accurate output voltage, ensuring precise operation of the connected electronic circuits.
• Low Quiescent Current: The device consumes very little current when in standby mode, minimizing power consumption.
• Thermal Shutdown Protection: The L4931CDT120 includes thermal shutdown protection, which prevents the device from overheating and ensures its safe operation.

Advantages and Disadvantages

Advantages: - Low dropout voltage enables efficient regulation. - High accuracy ensures precise voltage output. - Low quiescent current minimizes power consumption. - Thermal shutdown protection enhances safety.

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

Working Principles

The L4931CDT120 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 L4931CDT120 is commonly used in various electronic devices and circuits, including:

1. Battery-Powered Devices: It provides a stable voltage supply for battery-powered devices, ensuring consistent performance throughout the battery life.
2. Microcontrollers: The voltage regulator ensures a reliable power source for microcontrollers, preventing voltage fluctuations that could affect their operation.
3. Audio Amplifiers: It delivers a steady voltage to audio amplifiers, minimizing distortion and improving sound quality.
4. Embedded Systems: The L4931CDT120 is widely used in embedded systems to regulate the voltage supplied to various components, ensuring their proper functioning.

Detailed and Complete Alternative Models

Some alternative models to the L4931CDT120 voltage regulator include:

1. LM1117: A popular voltage regulator with adjustable output voltage and higher output current capacity.
2. LT1086: Offers a wide input voltage range and adjustable output voltage.
3. TPS7A47: Provides ultra-low dropout voltage and high output current capability.
4. MCP1700: Low-cost voltage regulator with low quiescent current and high accuracy.

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

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