L4931ABV50

Product Overview

• Category: Voltage Regulator
• Use: To regulate voltage in electronic circuits
• Characteristics: Low dropout, low quiescent current, high accuracy
• Package: TO-220, SOT-223
• Essence: Linear voltage regulator
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Input Voltage Range: 4.4V to 26V
• Output Voltage: 5V
• Output Current: Up to 100mA
• Dropout Voltage: 0.6V (typical)
• Quiescent Current: 5mA (typical)
• Line Regulation: 0.2% (typical)
• Load Regulation: 0.4% (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The L4931ABV50 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 voltage ensures efficient regulation even with small input-output differentials.
• Low quiescent current minimizes power consumption during standby or idle modes.
• High accuracy provides a stable and precise output voltage.
• Overcurrent and thermal protection safeguards the device and the connected circuitry.

Advantages

• Compact package options (TO-220, SOT-223) allow for easy integration into various circuit designs.
• Wide input voltage range enables compatibility with a broad range of power sources.
• Excellent line and load regulation characteristics ensure a stable output voltage under varying conditions.
• Robust protection features enhance reliability and prevent damage to the device.

Disadvantages

• Limited output current capability (up to 100mA) may not be suitable for high-power applications.
• Dropout voltage of 0.6V may result in higher power dissipation compared to low dropout regulators.

Working Principles

The L4931ABV50 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 and adjusting the pass transistor accordingly. This feedback loop ensures that the output voltage remains constant despite changes in input voltage or load conditions.

Detailed Application Field Plans

The L4931ABV50 is commonly used in various electronic devices and systems, including:

1. Battery-powered devices: Provides stable voltage supply for microcontrollers, sensors, and other low-power components.
2. Automotive electronics: Regulates voltage for audio systems, lighting controls, and other automotive applications.
3. Industrial control systems: Ensures precise voltage regulation for PLCs, motor drives, and instrumentation equipment.
4. Communication devices: Used in routers, modems, and wireless devices to maintain a stable power supply.

Detailed Alternative Models

1. LM1117-5.0: Similar voltage regulator with comparable specifications and pin configuration.
2. LT1763-5: Low dropout voltage regulator with higher output current capability.
3. MCP1700-500: Low quiescent current regulator suitable for battery-powered applications.

These alternative models offer similar functionality and can be considered as substitutes for the L4931ABV50 in specific applications.

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