LD1117DT12CTR

Product Overview

• Category: Voltage Regulator
• Use: LD1117DT12CTR 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: LD1117DT12CTR comes in a compact surface mount SOT-223 package, which ensures easy integration into electronic circuits.
• Essence: The essence of LD1117DT12CTR lies in its ability to regulate voltage efficiently and reliably, ensuring consistent performance of connected devices.
• Packaging/Quantity: It is typically available in reels containing 2500 units.

Specifications

• Input Voltage Range: 4.75V to 15V
• Output Voltage: 1.2V
• Output Current: Up to 800mA
• Dropout Voltage: 1.2V (typical)
• Quiescent Current: 5mA (typical)
• Line Regulation: ±0.2% (typical)
• Load Regulation: ±0.4% (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

LD1117DT12CTR 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 of the circuit.
3. Output Pin (VOUT): The regulated output voltage is obtained from this pin.

Functional Features

• Low Dropout Voltage: LD1117DT12CTR exhibits a low dropout voltage, enabling it to regulate the output voltage even when the input voltage is close to the desired output voltage.
• High Precision: It offers high precision in regulating the output voltage, ensuring stable and accurate power supply for connected devices.
• Thermal Overload Protection: LD1117DT12CTR incorporates thermal overload protection, preventing damage due to excessive heat.
• Short Circuit Protection: The device is equipped with short circuit protection, safeguarding it from potential damage caused by short circuits.

Advantages and Disadvantages

Advantages: - High precision voltage regulation - Low dropout voltage - Thermal and short circuit protection - Compact package size

Disadvantages: - Limited output current capacity (up to 800mA) - Relatively higher quiescent current compared to some other voltage regulators

Working Principles

LD1117DT12CTR 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 maintaining a constant voltage drop across the pass transistor, it ensures a stable output voltage regardless of variations in the input voltage.

Detailed Application Field Plans

LD1117DT12CTR finds applications in various electronic devices and systems that require a regulated 1.2V power supply. Some common application areas include:

1. Battery-powered devices
2. Microcontrollers and microprocessors
3. Communication systems
4. Audio amplifiers
5. Industrial control systems

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to LD1117DT12CTR are:

1. LM1117-1.2: A similar low dropout voltage regulator with a fixed 1.2V output voltage.
2. LT1117-1.2: Another option offering a fixed 1.2V output voltage with low dropout characteristics.
3. ADP3339-1.2: A precision voltage regulator with a fixed 1.2V output voltage and low quiescent current.

These alternative models provide similar functionality and can be used as substitutes depending on specific requirements.

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