LM2931BDT50

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

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

Package: TO-252 (DPAK)

Essence: The LM2931BDT50 is a low dropout voltage regulator IC that provides a regulated output voltage with high accuracy and low power consumption.

Packaging/Quantity: The LM2931BDT50 is available in a TO-252 package, also known as DPAK (Plastic Package). It is sold in reels or tubes containing a specific quantity of units.

Specifications

• Input Voltage Range: 4.5V to 26V
• Output Voltage: 5V
• Dropout Voltage: 0.6V (typical)
• Quiescent Current: 120µA (typical)
• Output Current: Up to 100mA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM2931BDT50 has the following pin configuration:

```

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| | --| Vin GND |-- Pin 1 --| Vout NC |-- Pin 2 --| NC NC |-- Pin 3 --| NC NC |-- Pin 4 --| NC NC |-- Pin 5 --| NC Vref |-- Pin 6 --| NC NC |-- Pin 7 --| NC NC |-- Pin 8 |___________| ```

Functional Features

• Low dropout voltage allows operation with small input-output voltage differentials.
• Low quiescent current ensures minimal power consumption during standby or idle conditions.
• High output voltage accuracy provides precise regulation for sensitive electronic components.
• Thermal shutdown protection prevents the IC from overheating and damaging itself or connected devices.
• Short-circuit current limiting protects against excessive current flow during a short circuit.

Advantages and Disadvantages

Advantages: - Low dropout voltage enables efficient power conversion. - Low quiescent current prolongs battery life in portable applications. - High output voltage accuracy ensures reliable performance of connected devices. - Thermal shutdown protection enhances safety and reliability. - Short-circuit current limiting protects against damage caused by excessive current.

Disadvantages: - Limited output current capacity (up to 100mA) may not be suitable for high-power applications. - Only available in a specific package type (TO-252/DPAK), limiting flexibility in certain designs.

Working Principles

The LM2931BDT50 is a linear voltage regulator that uses a PNP pass transistor to regulate the output voltage. It operates by comparing the reference voltage (Vref) with a fraction of the output voltage. Any difference between these voltages is amplified and used to control the pass transistor, adjusting its resistance to maintain a stable output voltage.

Detailed Application Field Plans

The LM2931BDT50 is commonly used in various electronic devices and systems, including but not limited to: - Battery-powered devices - Portable audio players - Mobile phones - Automotive electronics - Industrial control systems - Medical equipment

Detailed and Complete Alternative Models

Some alternative models to the LM2931BDT50 include: - LM1117-5.0: A popular low dropout voltage regulator with similar specifications and pin configuration. - LP2985-5.0: Another low dropout voltage regulator offering comparable features and performance. - LT1763-5.0: A high-performance, low dropout voltage regulator suitable for demanding applications.

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

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