LD1117DT28TR

Product Overview

• Category: Voltage Regulator
• Use: LD1117DT28TR is a low dropout linear voltage regulator designed to provide a fixed output voltage of 2.8V with a maximum current of 800mA.
• Characteristics: It offers low dropout voltage, high accuracy, and low quiescent current, making it suitable for various applications requiring a stable power supply.
• Package: LD1117DT28TR comes in a surface mount SOT-223 package.
• Essence: The essence of LD1117DT28TR lies in its ability to regulate the input voltage and provide a constant output voltage, ensuring reliable and stable operation of electronic devices.
• Packaging/Quantity: LD1117DT28TR is typically available in reels containing 2500 units.

Specifications

• Input Voltage Range: 4.5V to 15V
• Output Voltage: 2.8V
• Maximum Output Current: 800mA
• Dropout Voltage: 1.2V (at 800mA)
• Quiescent Current: 5mA
• Line Regulation: ±0.2%
• Load Regulation: ±0.4%
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

LD1117DT28TR has three pins:

1. Input Pin (VIN): Connects to the input voltage source.
2. Ground Pin (GND): Connected to the ground reference.
3. Output Pin (VOUT): Provides the regulated output voltage.

Functional Features

• Low Dropout Voltage: LD1117DT28TR exhibits a low dropout voltage, enabling it to operate efficiently even when the input voltage is close to the desired output voltage.
• High Accuracy: It offers high output voltage accuracy, ensuring precise regulation.
• Low Quiescent Current: The regulator consumes low quiescent current, minimizing power wastage.
• Short Circuit Protection: LD1117DT28TR incorporates short circuit protection, safeguarding the device and the connected circuitry.

Advantages and Disadvantages

Advantages: - Stable and reliable voltage regulation - Low dropout voltage - High accuracy - Short circuit protection

Disadvantages: - Limited maximum output current (800mA) - SOT-223 package may require additional PCB space compared to smaller packages

Working Principles

LD1117DT28TR operates based on the principle of linear voltage regulation. It utilizes a pass transistor to regulate the output voltage by adjusting the resistance between the input and output pins. This allows it to maintain a constant output voltage despite variations in the input voltage or load conditions.

Detailed Application Field Plans

LD1117DT28TR finds applications in various electronic devices and systems that require a stable and regulated power supply. Some common application fields include:

1. Battery-powered devices: Used to provide a stable voltage for microcontrollers, sensors, and other components in portable electronics.
2. Industrial automation: Ensures consistent power supply for control systems, motor drivers, and communication modules.
3. Automotive electronics: Provides regulated voltage for automotive ECUs, infotainment systems, and lighting controls.
4. IoT devices: Enables reliable operation of IoT nodes, wireless sensors, and smart home devices.

Detailed and Complete Alternative Models

1. LM1117-2.8: Similar to LD1117DT28TR, this model offers a fixed 2.8V output voltage with a maximum current of 800mA. It comes in a TO-220 package.
2. LT1761-2.8: A low dropout linear regulator with a fixed 2.8V output voltage and a maximum current of 100mA. It is available in a SOT-23 package.
3. MCP1702-2.8: Another alternative with a fixed 2.8V output voltage and a maximum current of 250mA. It comes in a SOT-223 package.

These alternative models provide similar functionality and can be considered based on specific application requirements.

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