L4931CDT50

Product Overview

• Category: Voltage Regulator
• Use: To regulate and stabilize voltage in electronic circuits
• Characteristics: Low dropout, high accuracy, low quiescent current
• Package: TO-252 (DPAK)
• Essence: Linear voltage regulator
• Packaging/Quantity: Tape and reel, 2,500 units per reel

Specifications

• Input Voltage Range: 4.4V to 20V
• Output Voltage: 5V
• Output Current: Up to 250mA
• Dropout Voltage: 0.6V typical at 250mA load
• Quiescent Current: 75µA typical
• Line Regulation: 0.04% typical
• Load Regulation: 0.1% typical
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L4931CDT50 has three pins:

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

Functional Features

• Low Dropout: The L4931CDT50 has a low dropout voltage, ensuring stable output even when the input voltage is close to the desired output voltage.
• High Accuracy: It provides precise regulation with low output voltage deviation.
• Low Quiescent Current: The device consumes minimal current when in standby mode, conserving power.
• Thermal Shutdown Protection: Built-in protection mechanism shuts down the regulator if it exceeds the safe operating temperature range.

Advantages and Disadvantages

Advantages: - High accuracy and stability - Low dropout voltage - Low quiescent current - Thermal shutdown protection

Disadvantages: - Limited output current capacity (up to 250mA) - Not suitable for high-power applications

Working Principles

The L4931CDT50 is a linear voltage regulator that uses a 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.

Detailed Application Field Plans

The L4931CDT50 is commonly used in various electronic devices and circuits, including:

1. Battery-Powered Devices: Portable electronics such as smartphones, tablets, and portable media players.
2. Embedded Systems: Microcontroller-based systems, IoT devices, and industrial automation equipment.
3. Consumer Electronics: TVs, audio amplifiers, DVD players, and gaming consoles.
4. Automotive Electronics: Car audio systems, infotainment systems, and dashboard displays.
5. Power Supply Modules: Used as a voltage regulator in power supply modules for various applications.

Detailed and Complete Alternative Models

1. LM317: Adjustable voltage regulator with higher output current capacity.
2. LM7805: Fixed 5V voltage regulator with higher output current capacity.
3. LT1084: Adjustable voltage regulator with low dropout voltage and higher output current capacity.
4. TS2950: Fixed 5V voltage regulator with low dropout voltage and lower output current capacity.

These alternative models offer similar functionality but may have different specifications and package options.

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