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L4949EPTR-E
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L4949EPTR-E

Product Overview

  • Category: Integrated Circuit
  • Use: Voltage Regulator
  • Characteristics: Low-dropout, adjustable output voltage
  • Package: TO-220FP
  • Essence: Linear voltage regulator with high precision and low dropout voltage
  • Packaging/Quantity: Tape and Reel, 2,500 units per reel

Specifications

  • Input Voltage Range: 4.5V to 40V
  • Output Voltage Range: 1.25V to 37V
  • Dropout Voltage: 0.45V at 1A
  • Output Current: Up to 1.5A
  • Line Regulation: ±0.02% (typical)
  • Load Regulation: ±0.04% (typical)
  • Quiescent Current: 80µA (typical)
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L4949EPTR-E has the following pin configuration:

  1. GND (Ground)
  2. Vout (Output Voltage)
  3. Vin (Input Voltage)
  4. ADJ (Adjustment Pin)

Functional Features

  • Low dropout voltage ensures efficient regulation even with small input-output voltage differentials.
  • Adjustable output voltage allows for flexibility in various applications.
  • Internal current limiting and thermal shutdown protection ensure safe operation.
  • Excellent line and load regulation characteristics provide stable output voltage.

Advantages

  • High precision and low dropout voltage make it suitable for applications requiring accurate voltage regulation.
  • Wide input voltage range enables compatibility with a variety of power sources.
  • Adjustable output voltage allows customization based on specific requirements.
  • Compact TO-220FP package facilitates easy integration into different circuit designs.

Disadvantages

  • Limited output current capacity may not be sufficient for high-power applications.
  • Higher quiescent current compared to some other voltage regulators may impact power efficiency in low-power applications.

Working Principles

The L4949EPTR-E is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the reference voltage with the feedback voltage obtained from the ADJ pin. The internal circuitry adjusts the pass transistor to maintain a stable output voltage, compensating for changes in input voltage and load conditions.

Detailed Application Field Plans

The L4949EPTR-E is commonly used in various electronic devices and systems, including:

  1. Power supplies for industrial equipment
  2. Automotive electronics
  3. Battery-powered devices
  4. Consumer electronics
  5. Telecommunications equipment

Detailed and Complete Alternative Models

  • LM317: Adjustable Linear Voltage Regulator
  • LT1083: Low Dropout Positive Adjustable Regulator
  • LM1117: Low Dropout Linear Regulator
  • TPS7A4700: Ultra-Low Noise, High PSRR, Fast Transient Response LDO Regulator

These alternative models offer similar functionality and can be considered as substitutes for the L4949EPTR-E based on specific application requirements.

In conclusion, the L4949EPTR-E is a versatile voltage regulator with high precision and low dropout voltage. Its adjustable output voltage, compact package, and wide range of applications make it a popular choice in various industries. However, its limited output current capacity and higher quiescent current should be taken into consideration when selecting this regulator for specific applications.

Seznam 10 běžných otázek a odpovědí souvisejících s aplikací L4949EPTR-E v technických řešeních

Sure! Here are 10 common questions and answers related to the application of L4949EPTR-E in technical solutions:

  1. Q: What is L4949EPTR-E? A: L4949EPTR-E is a voltage regulator IC designed for automotive applications, providing a stable output voltage.

  2. Q: What is the input voltage range of L4949EPTR-E? A: The input voltage range of L4949EPTR-E is typically between 5V and 40V.

  3. Q: What is the output voltage range of L4949EPTR-E? A: The output voltage range of L4949EPTR-E is typically between 5V and 28V.

  4. Q: What is the maximum output current of L4949EPTR-E? A: The maximum output current of L4949EPTR-E is typically 1.5A.

  5. Q: Is L4949EPTR-E suitable for automotive applications? A: Yes, L4949EPTR-E is specifically designed for automotive applications and can handle the harsh conditions found in vehicles.

  6. Q: Does L4949EPTR-E have built-in protection features? A: Yes, L4949EPTR-E includes various protection features such as overvoltage protection, thermal shutdown, and short-circuit protection.

  7. Q: Can L4949EPTR-E operate in a wide temperature range? A: Yes, L4949EPTR-E is designed to operate in a wide temperature range, typically from -40°C to +150°C.

  8. Q: How does L4949EPTR-E achieve voltage regulation? A: L4949EPTR-E uses a feedback mechanism to compare the output voltage with a reference voltage and adjusts the internal circuitry to maintain a stable output voltage.

  9. Q: Can L4949EPTR-E be used in other non-automotive applications? A: While L4949EPTR-E is primarily designed for automotive applications, it can also be used in other industrial or consumer electronic applications that require a stable voltage supply.

  10. Q: What package does L4949EPTR-E come in? A: L4949EPTR-E is available in a small surface-mount package called PowerSO-20.