STMicroelectronics
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LD1117AS25TR
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LD1117AS25TR

Basic Information Overview

  • Category: Voltage Regulator
  • Use: To regulate and stabilize voltage in electronic circuits
  • Characteristics:
    • Low dropout voltage
    • High output current capability
    • Thermal overload protection
  • Package: SOT-223
  • Essence: Linear voltage regulator
  • Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

  • Output Voltage: 2.5V
  • Input Voltage Range: 4.75V to 15V
  • Dropout Voltage: 1.2V (typical)
  • Output Current: Up to 800mA
  • Line Regulation: 0.2% (typical)
  • Load Regulation: 0.4% (typical)
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LD1117AS25TR has three pins: 1. VIN (Input Voltage): Connects to the input voltage source. 2. VOUT (Output Voltage): Provides the regulated output voltage. 3. GND (Ground): Connected to the common ground reference.

Functional Features

  • Low dropout voltage ensures efficient regulation even with small input-output voltage differentials.
  • High output current capability allows for powering a wide range of electronic components.
  • Thermal overload protection prevents damage due to excessive heat.

Advantages and Disadvantages

Advantages: - Low dropout voltage minimizes power dissipation. - High output current capability enables versatile applications. - Thermal overload protection enhances reliability.

Disadvantages: - Limited output voltage options (fixed at 2.5V). - Relatively higher cost compared to other voltage regulators.

Working Principles

The LD1117AS25TR is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the output voltage to a reference voltage and adjusting the pass transistor accordingly. When the output voltage drops below the desired level, the pass transistor increases its conductivity to maintain a stable output voltage.

Detailed Application Field Plans

The LD1117AS25TR is commonly used in various electronic devices and applications, including: - Power supplies for microcontrollers and digital circuits - Battery-powered systems requiring stable voltage levels - Automotive electronics - Industrial control systems - Consumer electronics

Detailed and Complete Alternative Models

  1. LM1117-2.5: Similar specifications and pin configuration, available in different packages.
  2. LT1117-2.5: Low dropout linear regulator with adjustable output voltage.
  3. LDO1117-2.5: Low dropout voltage regulator with improved line and load regulation.

Note: These alternative models offer similar functionality but may have slight differences in characteristics and package options.

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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van LD1117AS25TR in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of LD1117AS25TR in technical solutions:

  1. Q: What is LD1117AS25TR? A: LD1117AS25TR is a low dropout voltage regulator that provides a fixed output voltage of 2.5V.

  2. Q: What is the maximum input voltage for LD1117AS25TR? A: The maximum input voltage for LD1117AS25TR is typically around 15V.

  3. Q: Can LD1117AS25TR handle high current loads? A: Yes, LD1117AS25TR can handle current loads up to 800mA.

  4. Q: Is LD1117AS25TR suitable for battery-powered applications? A: Yes, LD1117AS25TR is commonly used in battery-powered applications due to its low dropout voltage and low quiescent current.

  5. Q: Does LD1117AS25TR require any external components for operation? A: Yes, LD1117AS25TR requires input and output capacitors for stability and proper operation.

  6. Q: Can LD1117AS25TR be used in automotive applications? A: Yes, LD1117AS25TR is often used in automotive applications as it can withstand high temperatures and has built-in protection features.

  7. Q: What is the thermal resistance of LD1117AS25TR? A: The thermal resistance of LD1117AS25TR is typically around 50°C/W, which determines its ability to dissipate heat.

  8. Q: Can LD1117AS25TR operate in a wide temperature range? A: Yes, LD1117AS25TR can operate in a temperature range of -40°C to +125°C.

  9. Q: Is LD1117AS25TR suitable for low-power applications? A: Yes, LD1117AS25TR is commonly used in low-power applications due to its low quiescent current and low dropout voltage.

  10. Q: Can LD1117AS25TR be used as a voltage reference? A: No, LD1117AS25TR is not designed to be used as a voltage reference. It is primarily used as a voltage regulator.

Please note that these answers are general and may vary depending on the specific application and requirements.