Linear Technology/QD Devices
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LT3083IDF

LT3083IDF

Product Overview

  • Category: Integrated Circuit
  • Use: Voltage Regulator
  • Characteristics: High-performance, low dropout linear regulator
  • Package: DFN (Dual Flat No-Lead)
  • Essence: Provides a stable and regulated output voltage for various electronic devices
  • Packaging/Quantity: Available in reels of 2500 units

Specifications

  • Input Voltage Range: 1.2V to 36V
  • Output Voltage Range: 0.6V to 34.5V
  • Dropout Voltage: 350mV at 1A Load Current
  • Maximum Output Current: 1.5A
  • Line Regulation: ±0.02% typical
  • Load Regulation: ±0.04% typical
  • Quiescent Current: 60µA
  • Thermal Resistance: 40°C/W junction-to-ambient
  • Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LT3083IDF has the following pin configuration:

  1. IN: Input voltage pin
  2. GND: Ground pin
  3. ADJ: Adjust pin for setting the output voltage
  4. OUT: Output voltage pin

Functional Features

  • Low dropout voltage allows operation with small input-output differentials
  • Adjustable output voltage through the ADJ pin
  • Excellent line and load regulation
  • Current limit protection
  • Thermal shutdown protection
  • Fast transient response

Advantages

  • High performance and accuracy
  • Wide input and output voltage range
  • Low quiescent current
  • Compact DFN package for space-constrained applications
  • Robust protection features ensure device longevity

Disadvantages

  • Relatively high thermal resistance may require additional heat dissipation measures
  • Limited maximum output current compared to some other regulators

Working Principles

The LT3083IDF is a linear voltage regulator that maintains a stable output voltage regardless of input voltage fluctuations. It achieves this by using a pass transistor to regulate the output voltage based on the feedback received from the ADJ pin. The device operates in a low dropout mode, allowing it to function even when the input-output differential is small.

Detailed Application Field Plans

The LT3083IDF finds applications in various electronic systems where a stable and regulated voltage supply is required. Some common application areas include:

  1. Power supplies for microcontrollers and other digital ICs
  2. Battery-powered devices
  3. Automotive electronics
  4. Industrial control systems
  5. Audio amplifiers
  6. LED lighting systems

Detailed and Complete Alternative Models

  • LM317: Adjustable Linear Voltage Regulator
  • LT1083: 7.5A Low Dropout Positive Fixed Regulator
  • LM1117: 800mA Low Dropout Linear Regulator
  • LT1763: 500mA, Low Noise, LDO Micropower Regulator

These alternative models offer similar functionality and can be considered as substitutes for the LT3083IDF depending on specific requirements.

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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van LT3083IDF in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of LT3083IDF in technical solutions:

  1. Q: What is LT3083IDF? A: LT3083IDF is a high-performance, low-dropout (LDO) linear regulator IC manufactured by Linear Technology (now part of Analog Devices). It is designed to provide a regulated output voltage with low noise and high power supply rejection ratio.

  2. Q: What is the input voltage range of LT3083IDF? A: The input voltage range of LT3083IDF is typically between 1.2V and 36V. However, it can handle transient voltages up to 40V without damage.

  3. Q: What is the maximum output current of LT3083IDF? A: The maximum output current of LT3083IDF is 3A. It can deliver stable and regulated output currents up to this limit.

  4. Q: Can LT3083IDF be used as a voltage regulator for sensitive analog circuits? A: Yes, LT3083IDF is suitable for powering sensitive analog circuits due to its low output noise and excellent line and load regulation characteristics.

  5. Q: Does LT3083IDF require any external components for operation? A: Yes, LT3083IDF requires a few external components such as input and output capacitors for stability and proper operation. The datasheet provides recommended values and configurations.

  6. Q: Is LT3083IDF capable of thermal shutdown protection? A: Yes, LT3083IDF has built-in thermal shutdown protection. If the junction temperature exceeds a certain threshold, the device will automatically shut down to prevent damage.

  7. Q: Can LT3083IDF operate in parallel to increase the output current? A: Yes, LT3083IDF can be easily paralleled to increase the output current capability. Proper thermal management and current sharing techniques should be employed for reliable operation.

  8. Q: What is the dropout voltage of LT3083IDF? A: The dropout voltage of LT3083IDF is typically around 350mV at full load. It means that the input voltage must be at least 350mV higher than the desired output voltage for proper regulation.

  9. Q: Can LT3083IDF handle reverse polarity protection? A: No, LT3083IDF does not have built-in reverse polarity protection. External diodes or other protection circuits should be used to prevent reverse voltage damage.

  10. Q: Is LT3083IDF suitable for battery-powered applications? A: Yes, LT3083IDF is well-suited for battery-powered applications due to its low quiescent current and ability to operate with low input voltages. It helps maximize battery life and maintain stable output voltage.

Please note that these answers are general and may vary depending on specific application requirements. Always refer to the datasheet and consult with an experienced engineer for accurate information.