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L7905CD2T-TR
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L7905CD2T-TR

Product Overview

Category

L7905CD2T-TR belongs to the category of voltage regulators.

Use

This product is primarily used for regulating and stabilizing voltage in electronic circuits.

Characteristics

  • Voltage Output: -5V
  • Maximum Input Voltage: -35V
  • Maximum Output Current: 1A
  • Package Type: D2PAK
  • Operating Temperature Range: -40°C to +125°C

Package and Quantity

The L7905CD2T-TR comes in a D2PAK package. It is typically sold in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

  • Output Voltage: -5V
  • Input Voltage Range: -7V to -25V
  • Dropout Voltage: 2V (maximum)
  • Line Regulation: 0.07% (typical)
  • Load Regulation: 0.1% (typical)
  • Quiescent Current: 6mA (typical)

Pin Configuration

The L7905CD2T-TR has three pins:

  1. Input Pin (VIN): This pin is used to connect the input voltage.
  2. Ground Pin (GND): This pin is connected to the ground reference.
  3. Output Pin (VOUT): The regulated -5V output voltage is obtained from this pin.

Functional Features

  • High precision voltage regulation.
  • Overcurrent and thermal protection.
  • Short-circuit protection.
  • Low dropout voltage.
  • Wide operating temperature range.

Advantages and Disadvantages

Advantages

  • Accurate and stable voltage regulation.
  • Protection features ensure safe operation.
  • Suitable for a wide range of applications.
  • Can handle high current loads.

Disadvantages

  • Dropout voltage may cause power dissipation.
  • Requires external capacitors for stability.
  • Limited input voltage range.

Working Principles

The L7905CD2T-TR is a negative voltage regulator that uses a series 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 -5V output.

Detailed Application Field Plans

The L7905CD2T-TR is commonly used in various electronic applications, including:

  1. Power supplies for audio amplifiers.
  2. Industrial control systems.
  3. Automotive electronics.
  4. Battery charging circuits.
  5. Instrumentation and measurement equipment.

Detailed Alternative Models

Here are some alternative models that can be used as substitutes for the L7905CD2T-TR:

  1. LM7905: This is a popular alternative from Texas Instruments.
  2. MC7905: A similar voltage regulator from ON Semiconductor.
  3. UA7905: An alternative model from Fairchild Semiconductor.

These alternatives have similar specifications and pin configurations, making them suitable replacements for the L7905CD2T-TR in various applications.

In conclusion, the L7905CD2T-TR is a negative voltage regulator with a -5V output. It offers accurate voltage regulation, protection features, and wide application possibilities. However, it has limitations such as dropout voltage and limited input voltage range. Alternatives like LM7905, MC7905, and UA7905 can be considered when seeking substitutes for this product.

Énumérez 10 questions et réponses courantes liées à l'application de L7905CD2T-TR dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of L7905CD2T-TR in technical solutions:

  1. Q: What is L7905CD2T-TR? A: L7905CD2T-TR is a voltage regulator IC that provides a fixed output voltage of -5V.

  2. Q: What is the maximum input voltage for L7905CD2T-TR? A: The maximum input voltage for L7905CD2T-TR is -35V.

  3. Q: Can L7905CD2T-TR be used to regulate positive voltages? A: No, L7905CD2T-TR is specifically designed to regulate negative voltages.

  4. Q: What is the maximum output current of L7905CD2T-TR? A: The maximum output current of L7905CD2T-TR is 1A.

  5. Q: Is L7905CD2T-TR suitable for high-power applications? A: No, L7905CD2T-TR is not recommended for high-power applications due to its limited output current.

  6. Q: Does L7905CD2T-TR require any external components for operation? A: Yes, L7905CD2T-TR requires input and output capacitors for stability and filtering.

  7. Q: Can L7905CD2T-TR handle short-circuit conditions? A: Yes, L7905CD2T-TR has built-in thermal and current limiting protection to handle short-circuits.

  8. Q: What is the operating temperature range of L7905CD2T-TR? A: The operating temperature range of L7905CD2T-TR is -40°C to +125°C.

  9. Q: Can L7905CD2T-TR be used in automotive applications? A: Yes, L7905CD2T-TR is suitable for automotive applications as it meets the necessary standards.

  10. Q: Are there any alternatives to L7905CD2T-TR for negative voltage regulation? A: Yes, there are other ICs available such as LM7905 and LT1054 that can also regulate negative voltages.

Please note that these answers are general and may vary depending on the specific application and requirements. It's always recommended to refer to the datasheet and consult with an expert for accurate information.