L4931ABPT50TR

Product Overview

• Category: Voltage Regulator
• Use: To regulate voltage in electronic circuits
• Characteristics: Low dropout, low quiescent current, high accuracy
• Package: SOT-223
• Essence: Linear voltage regulator
• Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Input Voltage Range: 2.5V to 20V
• Output Voltage: 5V
• Output Current: Up to 100mA
• Dropout Voltage: 0.6V (typical)
• 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 L4931ABPT50TR 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 voltage allows for efficient regulation even with small input-output differentials.
• Low quiescent current ensures minimal power consumption during standby or idle conditions.
• High accuracy provides a stable and precise output voltage.
• Thermal shutdown protection prevents damage due to excessive temperature.

Advantages

• Compact SOT-223 package enables space-saving integration into various applications.
• Wide input voltage range allows flexibility in design.
• Excellent line and load regulation ensure stable performance under varying conditions.
• Low dropout voltage minimizes power dissipation and extends battery life.

Disadvantages

• Limited output current capability may not be suitable for high-power applications.
• SOT-223 package may require additional heat sinking for higher power dissipation.

Working Principles

The L4931ABPT50TR is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the reference voltage with the feedback voltage, adjusting the pass transistor's resistance to maintain a constant output voltage. The dropout voltage is the minimum voltage required for the regulator to operate correctly.

Detailed Application Field Plans

The L4931ABPT50TR is commonly used in various electronic devices and systems, including:

1. Battery-powered devices: Portable electronics, handheld instruments, and battery chargers.
2. Automotive applications: Vehicle electronics, infotainment systems, and lighting controls.
3. Industrial equipment: Control systems, sensors, and instrumentation.
4. Communication systems: Wireless routers, modems, and network switches.
5. Consumer electronics: Audio/video equipment, gaming consoles, and set-top boxes.

Detailed and Complete Alternative Models

1. LM1117-5.0: Similar specifications and pin configuration, available in different packages.
2. LT1763-5: Higher output current capability, lower dropout voltage, and adjustable output voltage.
3. TPS7A4700: Ultra-low dropout voltage, higher output current, and adjustable output voltage.

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

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