LD1117S28TR

Basic Information Overview

• Category: Voltage Regulator
• Use: LD1117S28TR is a low dropout linear voltage regulator designed to provide a fixed output voltage of 2.8V with a maximum current of 800mA.
• Characteristics:
  • Low dropout voltage: The LD1117S28TR has a very low dropout voltage, which means it can regulate the output voltage even when the input voltage is close to the desired output voltage.
  • High accuracy: It provides a highly accurate output voltage with a tolerance of ±1%.
  • Thermal overload protection: The LD1117S28TR incorporates thermal overload protection, which prevents the device from getting damaged due to excessive heat.
• Package: The LD1117S28TR comes in a small surface mount SOT-223 package.
• Essence: The LD1117S28TR is an essential component in electronic circuits that require a stable and regulated 2.8V power supply.
• Packaging/Quantity: The LD1117S28TR is typically sold in reels containing 2500 units.

Specifications

• Output Voltage: 2.8V
• Maximum Output Current: 800mA
• Dropout Voltage: 1.2V (typical)
• Line Regulation: 0.2% (typical)
• Load Regulation: 0.4% (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LD1117S28TR 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 of 2.8V.

Functional Features

• Low dropout voltage ensures efficient regulation even with small input-output voltage differentials.
• Thermal overload protection prevents the device from overheating and getting damaged.
• High accuracy output voltage ensures stable and reliable performance.

Advantages

• Low dropout voltage allows for efficient power conversion.
• High accuracy output voltage ensures precise regulation.
• Thermal overload protection enhances device reliability and longevity.

Disadvantages

• Limited maximum output current of 800mA may not be suitable for high-power applications.
• SOT-223 package may require additional heat dissipation measures in certain cases.

Working Principles

The LD1117S28TR 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 to maintain a constant output voltage.

Detailed Application Field Plans

The LD1117S28TR can be used in various electronic applications, including: 1. Battery-powered devices: It can provide a stable 2.8V supply for microcontrollers, sensors, and other low-power components. 2. Communication systems: It can be used to regulate the voltage for RF modules, transceivers, and other communication circuitry. 3. Industrial control systems: It can ensure a reliable power source for control boards, sensors, and actuators in industrial automation.

Detailed and Complete Alternative Models

Some alternative models to LD1117S28TR include: 1. LM1117-2.8: A similar low dropout voltage regulator with a fixed output voltage of 2.8V. 2. LT1117-2.8: Another low dropout voltage regulator with a fixed output voltage of 2.8V, offering higher accuracy and lower dropout voltage compared to LD1117S28TR. 3. MCP1702-2.8: A low dropout voltage regulator with a fixed output voltage of 2.8V, featuring low quiescent current and thermal shutdown protection.

In conclusion, the LD1117S28TR is a low dropout linear voltage regulator that provides a stable 2.8V output voltage with high accuracy and thermal overload protection. It is commonly used in various electronic applications where a regulated power supply is required.