Linear Technology/QD Devices
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LT1129IST-5
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LT1129IST-5

Product Overview

Category

LT1129IST-5 belongs to the category of voltage regulators.

Use

It is primarily used for regulating voltage in electronic circuits.

Characteristics

  • Low dropout voltage
  • High output current capability
  • Adjustable output voltage
  • Thermal shutdown protection
  • Short-circuit current limiting

Package

LT1129IST-5 comes in a small surface-mount SOT-223 package.

Essence

The essence of LT1129IST-5 lies in its ability to provide stable and regulated voltage output.

Packaging/Quantity

This product is typically packaged in reels or tubes, with quantities varying based on customer requirements.

Specifications

  • Input Voltage Range: 2.7V to 15V
  • Output Voltage Range: 1.25V to 13.8V
  • Dropout Voltage: 0.45V at 800mA
  • Output Current: Up to 800mA
  • Quiescent Current: 75µA
  • Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

LT1129IST-5 has three pins:

  1. VIN (Pin 1): Input voltage pin.
  2. VOUT (Pin 2): Output voltage pin.
  3. GND (Pin 3): Ground pin.

Functional Features

  • Low Dropout Voltage: The LT1129IST-5 exhibits a low dropout voltage, enabling it to regulate voltage effectively even when the input voltage is close to the desired output voltage.
  • High Output Current Capability: With an output current capability of up to 800mA, this voltage regulator can power a wide range of electronic devices.
  • Adjustable Output Voltage: The output voltage can be adjusted within the specified range using external resistors.
  • Thermal Shutdown Protection: The LT1129IST-5 incorporates thermal shutdown protection, which prevents the device from overheating and ensures its longevity.
  • Short-Circuit Current Limiting: It features short-circuit current limiting to protect the regulator and the connected circuitry in case of a short circuit.

Advantages and Disadvantages

Advantages

  • Stable and regulated output voltage.
  • Wide input voltage range.
  • High output current capability.
  • Adjustable output voltage.
  • Thermal shutdown protection.
  • Short-circuit current limiting.

Disadvantages

  • Dropout voltage may limit its use in applications with low input voltages.

Working Principles

The LT1129IST-5 is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It compares the reference voltage with the feedback voltage and adjusts the pass transistor accordingly to maintain a stable output voltage.

Detailed Application Field Plans

LT1129IST-5 finds applications in various electronic devices and systems, including but not limited to: - Battery-powered devices - Portable electronics - Automotive electronics - Industrial control systems - Communication equipment

Detailed and Complete Alternative Models

Some alternative models to LT1129IST-5 include: - LM317 - LM1117 - LT1084 - LT1763

These models offer similar functionality and can be used as alternatives based on specific requirements.

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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van LT1129IST-5 in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of LT1129IST-5 in technical solutions:

  1. Question: What is the LT1129IST-5?
    Answer: The LT1129IST-5 is a low dropout linear regulator IC that provides a fixed output voltage of 5V.

  2. Question: What is the input voltage range for the LT1129IST-5?
    Answer: The input voltage range for the LT1129IST-5 is typically between 2.5V and 20V.

  3. Question: What is the maximum output current of the LT1129IST-5?
    Answer: The LT1129IST-5 can provide a maximum output current of 800mA.

  4. Question: Can the LT1129IST-5 be used in battery-powered applications?
    Answer: Yes, the LT1129IST-5 can be used in battery-powered applications as it has a low dropout voltage and operates efficiently with low input voltages.

  5. Question: Is the LT1129IST-5 suitable for use in automotive applications?
    Answer: Yes, the LT1129IST-5 is designed to operate in automotive environments and can withstand high temperatures and voltage transients.

  6. Question: Does the LT1129IST-5 require any external components for operation?
    Answer: Yes, the LT1129IST-5 requires input and output capacitors for stability and proper operation. Refer to the datasheet for recommended values.

  7. Question: Can the LT1129IST-5 handle short-circuit conditions?
    Answer: Yes, the LT1129IST-5 has built-in current limiting and thermal shutdown protection, which allows it to handle short-circuit conditions without damage.

  8. Question: What is the dropout voltage of the LT1129IST-5?
    Answer: The dropout voltage of the LT1129IST-5 is typically around 300mV at full load.

  9. Question: Can the LT1129IST-5 be used to generate other output voltages?
    Answer: No, the LT1129IST-5 is a fixed output voltage regulator and cannot be adjusted to generate different output voltages.

  10. Question: Is the LT1129IST-5 available in different package options?
    Answer: Yes, the LT1129IST-5 is available in various package options, including the SOT-223 package, which is commonly used for surface mount applications.

Please note that these answers are general and may vary depending on the specific application and requirements. It is always recommended to refer to the datasheet and consult with the manufacturer for detailed information.