STMicroelectronics
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L5975D

L5975D

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Voltage Regulator
  • Characteristics: High efficiency, low dropout voltage, adjustable output voltage, thermal shutdown, current limit protection
  • Package: PowerSO-10 package
  • Essence: Monolithic linear voltage regulator
  • Packaging/Quantity: Tape and reel packaging, 2500 units per reel

Specifications

  • Input Voltage Range: 4.4V to 36V
  • Output Voltage Range: 1.2V to 35V
  • Output Current: Up to 2A
  • Dropout Voltage: 400mV at 2A
  • Quiescent Current: 100µA
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L5975D IC has the following pin configuration:

  1. GND: Ground
  2. VOUT: Output Voltage
  3. ADJ: Adjustable Voltage
  4. EN: Enable Input
  5. FB: Feedback Input
  6. SS/TR: Soft Start/Tracking Input
  7. COMP: Compensation Node
  8. VREF: Reference Voltage
  9. VIN: Input Voltage
  10. BOOT: Bootstrap Capacitor Connection

Functional Features

  • High efficiency up to 95%
  • Low dropout voltage for improved performance
  • Adjustable output voltage for flexibility
  • Thermal shutdown protection to prevent overheating
  • Current limit protection for safe operation

Advantages and Disadvantages

Advantages

  • High efficiency leads to reduced power consumption
  • Low dropout voltage ensures stable output even with low input voltage
  • Adjustable output voltage allows customization for specific applications
  • Thermal shutdown protects the IC from damage due to excessive heat
  • Current limit protection prevents overloading and extends the lifespan of the IC

Disadvantages

  • Limited output current capacity (up to 2A)
  • Requires external components for proper operation
  • Relatively high quiescent current compared to some other voltage regulators

Working Principles

The L5975D is a monolithic linear voltage regulator that uses a feedback mechanism to maintain a stable output voltage. It operates by comparing the output voltage with a reference voltage and adjusting the internal circuitry accordingly. The adjustable output voltage feature allows users to set the desired voltage level within the specified range.

Detailed Application Field Plans

The L5975D is commonly used in various applications, including:

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

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the L5975D include:

  1. LM317: Adjustable voltage regulator with a wide input voltage range.
  2. LT1084: Low dropout voltage regulator capable of delivering higher output currents.
  3. LM1117: Fixed output voltage regulator available in various voltage options.
  4. TPS7A47: High-performance voltage regulator with low noise and high PSRR.
  5. ADP3339: Low dropout voltage regulator with adjustable output voltage.

These alternative models can be considered based on specific requirements and application needs.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací L5975D v technických řešeních

Sure! Here are 10 common questions and answers related to the application of L5975D in technical solutions:

  1. Q: What is L5975D? A: L5975D is a high-efficiency step-down switching regulator IC (integrated circuit) commonly used in power supply applications.

  2. Q: What is the input voltage range supported by L5975D? A: L5975D supports an input voltage range from 4.5V to 36V, making it suitable for a wide range of applications.

  3. Q: What is the output voltage range provided by L5975D? A: L5975D can provide an adjustable output voltage range from 0.6V to 28V, allowing flexibility in various power supply designs.

  4. Q: What is the maximum output current that L5975D can handle? A: L5975D can handle a maximum output current of up to 3A, making it suitable for powering a variety of electronic devices.

  5. Q: Does L5975D require any external components for operation? A: Yes, L5975D requires a few external components such as input/output capacitors, inductor, and feedback resistors for proper operation.

  6. Q: Can L5975D operate in a wide temperature range? A: Yes, L5975D has a wide operating temperature range from -40°C to 125°C, making it suitable for both industrial and automotive applications.

  7. Q: Does L5975D have built-in protection features? A: Yes, L5975D includes several built-in protection features like thermal shutdown, overcurrent protection, and short-circuit protection.

  8. Q: Is L5975D easy to use in PCB designs? A: Yes, L5975D is available in a compact and thermally enhanced package, making it easy to integrate into PCB designs.

  9. Q: Can L5975D be used in battery-powered applications? A: Yes, L5975D's low quiescent current and high efficiency make it suitable for battery-powered applications, helping to extend battery life.

  10. Q: Are there any application notes or reference designs available for L5975D? A: Yes, the manufacturer provides application notes and reference designs that can help users understand and implement L5975D in their projects effectively.

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