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LD1117DT33TR
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LD1117DT33TR

Product Overview

  • Category: Voltage Regulator
  • Use: LD1117DT33TR is a low-dropout voltage regulator designed to provide a stable output voltage for various electronic devices.
  • Characteristics: It offers low dropout voltage, high accuracy, and excellent line and load regulation. The device is available in a small package, making it suitable for space-constrained applications.
  • Package: LD1117DT33TR comes in a TO-252 package.
  • Essence: The essence of LD1117DT33TR lies in its ability to regulate voltage efficiently and reliably.
  • Packaging/Quantity: The product is typically packaged in reels with a quantity of 2500 units per reel.

Specifications

  • Input Voltage Range: 4.75V to 15V
  • Output Voltage: 3.3V
  • Dropout Voltage: 1.2V (typical)
  • Maximum Output Current: 800mA
  • Line Regulation: ±0.2% (typical)
  • Load Regulation: ±0.4% (typical)
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LD1117DT33TR has three pins:

  1. Input (IN): This pin is connected to the input voltage source.
  2. Ground (GND): This pin is connected to the ground reference.
  3. Output (OUT): This pin provides the regulated output voltage.

Functional Features

  • Low dropout voltage ensures efficient regulation even when the input voltage is close to the desired output voltage.
  • High accuracy and excellent line/load regulation guarantee a stable output voltage under varying conditions.
  • Thermal shutdown protection prevents the device from overheating.
  • Short-circuit current limit protects the regulator and the connected circuitry from excessive current.

Advantages and Disadvantages

Advantages: - Low dropout voltage enables efficient regulation. - High accuracy ensures a stable output voltage. - Small package size allows for space-saving designs. - Thermal shutdown protection enhances device reliability.

Disadvantages: - Maximum output current of 800mA may limit its use in high-power applications. - Limited input voltage range restricts compatibility with certain systems.

Working Principles

LD1117DT33TR 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 terminals. The device compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a constant output voltage.

Detailed Application Field Plans

LD1117DT33TR finds applications in various electronic devices that require a stable 3.3V power supply. Some common application fields include:

  1. Microcontrollers and microprocessors
  2. Digital cameras
  3. Wireless communication modules
  4. Portable audio players
  5. Battery-powered devices

Detailed and Complete Alternative Models

  • LM1117-3.3: A similar low-dropout voltage regulator with comparable specifications.
  • LT1763-3.3: Another alternative offering high accuracy and low dropout voltage.
  • NCP1117-3.3: An alternative model with a wider input voltage range.

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

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技術ソリューションにおける LD1117DT33TR の適用に関連する 10 件の一般的な質問と回答をリストします。

Sure! Here are 10 common questions and answers related to the application of LD1117DT33TR in technical solutions:

  1. Q: What is LD1117DT33TR? A: LD1117DT33TR is a low dropout voltage regulator that provides a fixed output voltage of 3.3V.

  2. Q: What is the maximum input voltage for LD1117DT33TR? A: The maximum input voltage for LD1117DT33TR is typically around 15V.

  3. Q: What is the dropout voltage of LD1117DT33TR? A: The dropout voltage of LD1117DT33TR is typically around 1.2V at a load current of 800mA.

  4. Q: Can LD1117DT33TR handle high currents? A: Yes, LD1117DT33TR can handle currents up to 800mA, making it suitable for many low-power applications.

  5. Q: Is LD1117DT33TR a linear regulator or a switching regulator? A: LD1117DT33TR is a linear regulator, which means it regulates the output voltage by dissipating excess power as heat.

  6. Q: Does LD1117DT33TR require any external components for operation? A: Yes, LD1117DT33TR requires input and output capacitors for stability and proper operation. Refer to the datasheet for recommended values.

  7. Q: Can LD1117DT33TR be used in battery-powered applications? A: Yes, LD1117DT33TR can be used in battery-powered applications as it has a low quiescent current and operates efficiently with low input voltages.

  8. Q: What is the thermal resistance of LD1117DT33TR? A: The thermal resistance of LD1117DT33TR is typically around 50°C/W, which determines its ability to dissipate heat.

  9. Q: Can LD1117DT33TR handle reverse polarity protection? A: No, LD1117DT33TR does not have built-in reverse polarity protection. It is important to ensure correct polarity during installation.

  10. Q: What are some common applications for LD1117DT33TR? A: LD1117DT33TR is commonly used in various electronic devices such as microcontrollers, sensors, and other low-power digital circuits that require a stable 3.3V power supply.

Please note that these answers are general and may vary depending on the specific application and requirements. Always refer to the datasheet and consult with an expert when designing your circuit.