LD1117DT12TR

Product Overview

• Category: Voltage Regulator
• Use: LD1117DT12TR is a low dropout linear voltage regulator designed to provide a fixed output voltage of 1.2V.
• Characteristics: It offers high precision and low quiescent current, making it suitable for various applications that require a stable and regulated power supply.
• Package: LD1117DT12TR comes in a small surface mount package (SOT-223) which allows for easy integration onto PCBs.
• Essence: The essence of LD1117DT12TR lies in its ability to regulate the input voltage and provide a constant output voltage of 1.2V.
• Packaging/Quantity: LD1117DT12TR is typically sold in reels containing a quantity of 2500 units.

Specifications

• Input Voltage Range: 4.75V - 15V
• Output Voltage: 1.2V
• Output Current: Up to 800mA
• Dropout Voltage: 1.1V (typical)
• Quiescent Current: 5mA (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LD1117DT12TR has three pins:

1. Input Pin (VIN): This pin is used to connect the input voltage source.
2. Ground Pin (GND): This pin is connected to the ground reference.
3. Output Pin (VOUT): The regulated output voltage of 1.2V is obtained from this pin.

Functional Features

• Low Dropout Voltage: LD1117DT12TR has a low dropout voltage, allowing it to regulate the output voltage even when the input voltage is close to the desired output voltage.
• Short Circuit Protection: It incorporates short circuit protection, preventing damage to the regulator and the connected circuitry in case of a short circuit.
• Thermal Overload Protection: LD1117DT12TR includes thermal overload protection, which shuts down the regulator if it exceeds the safe operating temperature range.
• Stable Output Voltage: The voltage output remains stable even under varying load conditions.

Advantages

• High precision and low quiescent current make it suitable for battery-powered devices.
• Small package size enables easy integration into compact designs.
• Short circuit and thermal overload protection enhance reliability and safety.
• Wide input voltage range allows for flexibility in various applications.

Disadvantages

• Limited output current capacity may not be sufficient for high-power applications.
• Dropout voltage can cause power dissipation and reduce efficiency in certain scenarios.

Working Principles

LD1117DT12TR operates based on the principle of linear voltage regulation. It uses a pass transistor to regulate the output voltage by adjusting the resistance between the input and output pins. By comparing the output voltage with a reference voltage, the regulator adjusts the pass transistor to maintain a constant output voltage of 1.2V.

Application Field Plans

LD1117DT12TR finds applications in various fields, including:

1. Battery-powered devices: It provides a stable power supply for portable electronics such as smartphones, tablets, and wearable devices.
2. Industrial automation: LD1117DT12TR is used in control systems, sensors, and actuators that require precise and regulated power.
3. Automotive electronics: It is employed in automotive modules, infotainment systems, and lighting applications.
4. Communication equipment: LD1117DT12TR ensures a reliable power source for routers, switches, and other network devices.

Alternative Models

Some alternative models that offer similar functionality to LD1117DT12TR include:

1. LM1117-1.2: Manufactured by Texas Instruments, it provides a fixed output voltage of 1.2V with similar specifications.
2. LT1117-1.2: Produced by Linear Technology, it offers a regulated output voltage of 1.2V and has comparable features.

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

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