LD2981CM50TR

Product Overview

Category

LD2981CM50TR belongs to the category of voltage regulators.

Use

It is commonly used to regulate and stabilize voltage in electronic circuits.

Characteristics

• LD2981CM50TR is a low-dropout (LDO) voltage regulator.
• It has a fixed output voltage of 5.0V.
• The device operates with a maximum input voltage of 16V.
• LD2981CM50TR has a low quiescent current, making it suitable for battery-powered applications.
• It offers excellent line and load regulation.

Package

The LD2981CM50TR comes in a small surface-mount package.

Essence

The essence of LD2981CM50TR lies in its ability to provide a stable and regulated output voltage of 5.0V.

Packaging/Quantity

LD2981CM50TR is typically packaged in reels or tubes, containing a specific quantity per package.

Specifications

• Output Voltage: 5.0V
• Input Voltage Range: Up to 16V
• Dropout Voltage: 300mV (typical)
• Quiescent Current: 75µA (typical)
• Maximum Output Current: 100mA
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LD2981CM50TR has three pins:

1. VIN (Input Voltage): This pin is connected to the input voltage source.
2. VOUT (Output Voltage): This pin provides the regulated output voltage of 5.0V.
3. GND (Ground): This pin is connected to the ground reference.

Functional Features

• Low dropout voltage ensures efficient regulation even when the input voltage is close to the desired output voltage.
• Excellent line and load regulation characteristics maintain a stable output voltage under varying conditions.
• Low quiescent current minimizes power consumption, making it suitable for battery-powered applications.
• Overcurrent and thermal protection features safeguard the device and the connected circuitry.

Advantages and Disadvantages

Advantages

• Stable and regulated output voltage of 5.0V.
• Low dropout voltage ensures efficient regulation.
• Excellent line and load regulation characteristics.
• Low quiescent current for reduced power consumption.
• Overcurrent and thermal protection features.

Disadvantages

• Limited maximum output current of 100mA.
• Fixed output voltage may not be suitable for all applications requiring variable voltages.

Working Principles

The LD2981CM50TR operates based on the principle of a low-dropout voltage regulator. It uses a pass transistor to regulate the output voltage by adjusting the resistance between the input and output terminals. This allows it to maintain a stable output voltage even when the input voltage fluctuates.

Detailed Application Field Plans

LD2981CM50TR finds applications in various electronic circuits where a stable 5.0V voltage is required. Some common application fields include:

1. Battery-powered devices: LD2981CM50TR's low quiescent current makes it ideal for portable electronics such as smartphones, tablets, and wearable devices.
2. Embedded systems: It can be used in microcontroller-based systems, providing a stable power supply for reliable operation.
3. Communication equipment: LD2981CM50TR ensures a consistent voltage supply in routers, modems, and other networking devices.
4. Automotive electronics: It can be employed in automotive applications, including infotainment systems, navigation units, and engine control modules.

Detailed and Complete Alternative Models

1. LM1117-5.0: A popular alternative with similar specifications and pin configuration.
2. LT1763-5.0: Another alternative offering higher maximum output current and lower dropout voltage.
3. MCP1700-500: An alternative with a lower quiescent current and wider operating temperature range.

These alternatives can be considered based on specific requirements and compatibility with the target application.

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