LM2931AZ50

Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Low dropout voltage - Low quiescent current - High output voltage accuracy - Thermal shutdown protection

Package: TO-92

Essence: LM2931AZ50 is a low dropout voltage regulator IC that provides a fixed output voltage of 5.0V.

Packaging/Quantity: The LM2931AZ50 is available in a TO-92 package and is typically sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 6V to 26V
• Output Voltage: 5.0V
• Dropout Voltage: 0.5V (typical)
• Quiescent Current: 120µA (typical)
• Output Current: Up to 100mA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM2931AZ50 has three pins:

1. Input (Vin): This pin is connected to the input voltage source.
2. Ground (GND): This pin is connected to the ground reference.
3. Output (Vout): This pin provides the regulated output voltage.

Functional Features

• Low dropout voltage: The LM2931AZ50 has a low dropout voltage, allowing it to regulate the output voltage even when the input voltage is close to the desired output voltage.
• Low quiescent current: The IC consumes very low current when in standby mode, minimizing power consumption.
• High output voltage accuracy: The LM2931AZ50 provides a highly accurate output voltage of 5.0V, ensuring stable and reliable performance.
• Thermal shutdown protection: The IC includes built-in thermal shutdown protection, which prevents damage due to excessive temperature.

Advantages and Disadvantages

Advantages: - Low dropout voltage enables efficient regulation. - Low quiescent current minimizes power consumption. - High output voltage accuracy ensures stable performance. - Thermal shutdown protection prevents damage from overheating.

Disadvantages: - Limited output current capacity (up to 100mA). - TO-92 package may not be suitable for all applications requiring higher power dissipation.

Working Principles

The LM2931AZ50 is a linear voltage regulator that uses a PNP pass transistor to regulate the output voltage. It operates by comparing the reference voltage with the feedback voltage and adjusting the pass transistor accordingly to maintain a constant output voltage of 5.0V.

Detailed Application Field Plans

The LM2931AZ50 is commonly used in various electronic devices and systems, including but not limited to: - Battery-powered devices - Portable audio players - Automotive electronics - Industrial control systems - Medical equipment

Detailed and Complete Alternative Models

Some alternative models to the LM2931AZ50 include: - LM1117-5.0: Similar low dropout voltage regulator with a TO-220 package. - LP2985-5.0: Low dropout voltage regulator with adjustable output voltage. - LT1763-5.0: Low dropout voltage regulator with high output current capability.

These alternative models offer similar functionality and can be considered as substitutes depending on specific requirements and constraints.

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