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LT8711EUDC

LT8711EUDC

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High Efficiency, Synchronous Buck-Boost Converter
  • Package: 4mm x 5mm QFN-28
  • Essence: Voltage Regulator
  • Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

The LT8711EUDC is a high-performance synchronous buck-boost converter designed for power management applications. It operates over an input voltage range of 2.8V to 40V and can deliver up to 10A of continuous output current. The device offers excellent efficiency and low quiescent current, making it suitable for battery-powered systems.

Key specifications of the LT8711EUDC include:

  • Input Voltage Range: 2.8V to 40V
  • Output Voltage Range: 1.3V to 40V
  • Continuous Output Current: Up to 10A
  • Switching Frequency: 100kHz to 750kHz
  • Quiescent Current: 20µA
  • Efficiency: Up to 98%
  • Operating Temperature Range: -40°C to 125°C

Pin Configuration

The LT8711EUDC features a 28-pin QFN package with the following pin configuration:

  1. VIN: Input Voltage
  2. SW: Switch Node Connection
  3. PGND: Power Ground
  4. AGND: Analog Ground
  5. FB: Feedback Voltage Input
  6. SS/TR: Soft-Start/Tracking Control
  7. SYNC/MODE: External Clock Sync or Mode Selection
  8. VCC: IC Supply Voltage
  9. BST: Bootstrap Capacitor Connection
  10. LX: Inductor Connection
  11. COMP: Compensation Node
  12. SS/TR: Soft-Start/Tracking Control
  13. SYNC/MODE: External Clock Sync or Mode Selection
  14. VCC: IC Supply Voltage
  15. BST: Bootstrap Capacitor Connection
  16. LX: Inductor Connection
  17. COMP: Compensation Node
  18. PGND: Power Ground
  19. AGND: Analog Ground
  20. FB: Feedback Voltage Input
  21. SW: Switch Node Connection
  22. VIN: Input Voltage
  23. PGND: Power Ground
  24. AGND: Analog Ground
  25. FB: Feedback Voltage Input
  26. SS/TR: Soft-Start/Tracking Control
  27. SYNC/MODE: External Clock Sync or Mode Selection
  28. VCC: IC Supply Voltage

Functional Features

The LT8711EUDC offers several functional features that make it a versatile and efficient power management solution:

  1. Synchronous Buck-Boost Conversion: The device can regulate the output voltage higher or lower than the input voltage, providing flexibility in various applications.
  2. Wide Input Voltage Range: With an input voltage range of 2.8V to 40V, the LT8711EUDC can handle a wide variety of power sources.
  3. High Efficiency: The converter achieves up to 98% efficiency, minimizing power losses and maximizing battery life.
  4. Low Quiescent Current: With a quiescent current of only 20µA, the LT8711EUDC is suitable for low-power applications.
  5. Programmable Frequency: The switching frequency can be adjusted from 100kHz to 750kHz, allowing optimization for different operating conditions.
  6. Soft-Start and Tracking Control: The device provides soft-start and tracking control functions, ensuring smooth startup and accurate voltage tracking.

Advantages and Disadvantages

Advantages of the LT8711EUDC:

  • Wide input voltage range allows for versatile applications.
  • High efficiency reduces power losses and extends battery life.
  • Low quiescent current is suitable for low-power systems.
  • Programmable frequency enables optimization for different operating conditions.
  • Soft-start and tracking control ensure smooth startup and accurate voltage tracking.

Disadvantages of the LT8711EUDC:

  • Limited output current compared to some other power management ICs.
  • Requires careful consideration of thermal management due to high efficiency.

Working Principles

The LT8711EUDC operates based on a synchronous buck-boost conversion topology. It utilizes an internal power switch and synchronous rectification to efficiently regulate the output voltage. The device employs a constant-frequency, current-mode control architecture to provide stable and reliable operation.

During operation, the LT8711EUDC continuously monitors the feedback voltage and adjusts the duty cycle of the internal power switch to maintain the desired output voltage. The converter can seamlessly transition between buck and boost modes, allowing it to regulate the output voltage higher or lower than the input voltage.

Application Field Plans

The LT8711EUDC is well-suited for various

Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van LT8711EUDC in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of LT8711EUDC in technical solutions:

Q1: What is LT8711EUDC? A1: LT8711EUDC is a specific model of DC/DC controller IC (integrated circuit) manufactured by Linear Technology (now part of Analog Devices). It is commonly used in power management applications.

Q2: What is the input voltage range of LT8711EUDC? A2: The input voltage range of LT8711EUDC is typically between 4.5V and 80V.

Q3: What is the output voltage range of LT8711EUDC? A3: The output voltage range of LT8711EUDC can be adjusted from 0.8V to VIN-2V, where VIN is the input voltage.

Q4: What is the maximum output current of LT8711EUDC? A4: The maximum output current of LT8711EUDC depends on the external components used in the application. It can handle high currents with appropriate design considerations.

Q5: Can LT8711EUDC operate in a synchronous buck-boost configuration? A5: Yes, LT8711EUDC can operate in both buck and boost configurations, making it suitable for applications requiring voltage step-up or step-down.

Q6: Does LT8711EUDC have built-in protection features? A6: Yes, LT8711EUDC includes various protection features such as overvoltage protection, overcurrent protection, and thermal shutdown.

Q7: What is the switching frequency of LT8711EUDC? A7: The switching frequency of LT8711EUDC is typically adjustable from 100kHz to 750kHz, allowing flexibility in design.

Q8: Can LT8711EUDC be synchronized to an external clock? A8: Yes, LT8711EUDC has a synchronization pin that allows it to be synchronized to an external clock source for applications requiring precise timing.

Q9: Is LT8711EUDC suitable for automotive applications? A9: Yes, LT8711EUDC is designed to meet the requirements of automotive applications and can operate in a wide temperature range.

Q10: Are there evaluation boards available for LT8711EUDC? A10: Yes, Analog Devices provides evaluation boards for LT8711EUDC, which can help in the prototyping and testing of various technical solutions.

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