L4931ABPT80TR

Product Overview

• Category: Voltage Regulator
• Use: To regulate voltage in electronic circuits
• Characteristics:
  • Low dropout voltage
  • High output current capability
  • Thermal shutdown protection
  • Short-circuit current limiting
• Package: SOT-223
• Essence: A voltage regulator designed for low-power applications
• Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Input Voltage Range: 4.2V to 20V
• Output Voltage: 3.3V
• Output Current: Up to 100mA
• Dropout Voltage: 0.6V (typical)
• Line Regulation: ±0.05% (typical)
• Load Regulation: ±0.1% (typical)
• Quiescent Current: 5mA (typical)

Pin Configuration

The L4931ABPT80TR has the following pin configuration:

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• Pin 1: Input Voltage (VIN)
• Pin 2: Ground (GND)
• Pin 3: Output Voltage (VOUT)

Functional Features

• Low dropout voltage ensures efficient regulation even with small input-output differentials.
• High output current capability allows for powering various components in low-power applications.
• Thermal shutdown protection prevents damage due to excessive temperature.
• Short-circuit current limiting protects the regulator and connected components from damage during a short circuit.

Advantages

• Compact SOT-223 package enables space-saving integration into electronic circuits.
• Low dropout voltage minimizes power dissipation and improves efficiency.
• Thermal shutdown protection enhances reliability by preventing overheating.
• Short-circuit current limiting safeguards the regulator and connected components.

Disadvantages

• Limited output current capability may not be suitable for high-power applications.
• Input voltage range is relatively narrow, restricting compatibility with certain systems.

Working Principles

The L4931ABPT80TR operates as a linear voltage regulator. It maintains a constant output voltage by adjusting its internal resistance to compensate for changes in input voltage and load conditions. The dropout voltage is the minimum voltage difference required between the input and output for proper regulation.

Detailed Application Field Plans

The L4931ABPT80TR is commonly used in low-power electronic devices that require a stable 3.3V power supply. Some typical application fields include:

1. Battery-powered devices: Portable electronics, such as smartphones, tablets, and wearable devices, benefit from the low dropout voltage and thermal protection features of the L4931ABPT80TR.
2. IoT devices: Internet of Things (IoT) sensors and modules often operate on low power and require a regulated voltage source. The L4931ABPT80TR provides an efficient solution for these applications.
3. Embedded systems: Microcontrollers, sensors, and other components in embedded systems can be powered by the L4931ABPT80TR, ensuring stable operation.

Detailed and Complete Alternative Models

1. LM1117-3.3: A popular alternative with similar specifications and pin configuration.
2. MCP1700-3302E: Another voltage regulator option offering comparable performance.
3. TS2937CP33: Provides a higher output current capability while maintaining low dropout voltage.

These alternative models can be considered based on specific requirements and availability.

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