STMicroelectronics
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L7987L
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L7987L Product Overview

Introduction

The L7987L is a voltage regulator integrated circuit designed for use in various electronic applications. This entry provides an in-depth overview of the product, including its category, use, characteristics, packaging, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.

Product Information Overview

Category

The L7987L belongs to the category of voltage regulator integrated circuits.

Use

It is used to regulate voltage in electronic circuits, ensuring a stable and reliable power supply.

Characteristics

  • High efficiency
  • Low dropout voltage
  • Wide input voltage range
  • Overcurrent and thermal protection

Package

The L7987L is available in a small outline package (SO-8) and exposed pad package (ePad SO-8).

Essence

The essence of the L7987L lies in its ability to provide precise voltage regulation while offering protection features for enhanced reliability.

Packaging/Quantity

The L7987L is typically packaged in reels with a quantity of 2500 units per reel.

Specifications

  • Input Voltage Range: 4.5V to 38V
  • Output Voltage Range: 1.2V to 20V
  • Maximum Output Current: 3A
  • Dropout Voltage: 300mV at 3A
  • Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The L7987L features the following pin configuration: 1. VIN (Input Voltage) 2. GND (Ground) 3. NC (No Connection) 4. VOUT (Output Voltage) 5. NC (No Connection) 6. NC (No Connection) 7. NC (No Connection) 8. EN (Enable)

Functional Features

  • Adjustable output voltage
  • Overcurrent and thermal protection
  • Fast transient response
  • Low quiescent current

Advantages and Disadvantages

Advantages

  • High efficiency
  • Wide input voltage range
  • Compact package size
  • Enhanced protection features

Disadvantages

  • Limited maximum output current
  • Higher dropout voltage compared to some alternatives

Working Principles

The L7987L operates by comparing the output voltage to a reference voltage and adjusting the pass element to maintain a stable output voltage. It utilizes feedback control to achieve precise voltage regulation.

Detailed Application Field Plans

The L7987L is well-suited for various applications, including: - Battery-powered devices - Industrial automation - Automotive electronics - Consumer electronics

Detailed and Complete Alternative Models

Some alternative models to the L7987L include: - LDO regulators such as LM1117 - Switching regulators like LM2596 - Linear regulators such as LM317

In conclusion, the L7987L is a versatile voltage regulator IC with a wide range of applications and notable characteristics. Its efficient performance and protection features make it a valuable component in electronic designs.

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Énumérez 10 questions et réponses courantes liées à l'application de L7987L dans les solutions techniques

  1. What is the L7987L?

    • The L7987L is a high-efficiency step-down switching regulator designed to provide a regulated output voltage from an unregulated input voltage source.

  2. What is the input voltage range of the L7987L?

    • The L7987L has an input voltage range from 4.5V to 61V, making it suitable for a wide variety of applications.

  3. What is the output current capability of the L7987L?

    • The L7987L can deliver up to 3A of continuous output current, making it suitable for powering a range of loads in various technical solutions.

  4. What are the key features of the L7987L?

    • The L7987L features include high efficiency, wide input voltage range, adjustable output voltage, overcurrent and thermal protection, and low quiescent current.

  5. How can I adjust the output voltage of the L7987L?

    • The output voltage of the L7987L can be adjusted using an external resistor divider network connected to the feedback pin.

  6. What are the typical applications of the L7987L?

    • Typical applications of the L7987L include industrial automation, automotive systems, battery-powered equipment, and distributed power systems.

  7. What is the efficiency of the L7987L?

    • The L7987L offers high efficiency, typically above 90%, which helps to minimize power dissipation and maximize battery life in portable applications.

  8. Does the L7987L have built-in protection features?

    • Yes, the L7987L includes overcurrent protection and thermal shutdown to ensure safe operation under fault conditions.

  9. Is the L7987L available in different package options?

    • Yes, the L7987L is available in a range of package options, including exposed pad SO-8 and PowerSSO-12, to suit different application requirements.

  10. Where can I find detailed technical information about the L7987L?

    • Detailed technical information about the L7987L can be found in the datasheet provided by the manufacturer, as well as application notes and reference designs on their website.