Linear Technology/Analog Devices
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LTC3876IFE

LTC3876IFE

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High Efficiency, Synchronous Buck Controller
  • Package: 28-Lead TSSOP
  • Essence: Regulates and controls power supply voltage
  • Packaging/Quantity: Tube/100 pieces

Specifications

  • Input Voltage Range: 4.5V to 38V
  • Output Voltage Range: 0.6V to 5.5V
  • Switching Frequency: Up to 2MHz
  • Maximum Duty Cycle: 99%
  • Quiescent Current: 20µA
  • Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

  1. VIN: Input Voltage
  2. GND: Ground
  3. FB: Feedback Voltage
  4. SS: Soft-Start
  5. SYNC/MODE: External Clock Synchronization or Mode Selection
  6. VCC: Supply Voltage for Internal Circuitry
  7. PGND: Power Ground
  8. SW: Switch Node Connection
  9. BOOT: Bootstrap Capacitor Connection
  10. BST: Boost Voltage Output
  11. COMP: Compensation Node
  12. RT/CLKOUT: Oscillator Resistor or Clock Output
  13. CLKIN: External Clock Input
  14. SS/TRK: Soft-Start or Tracking Control
  15. PGOOD: Power Good Indicator
  16. ITH: Current Sense Threshold
  17. VSENSE: Current Sense Input
  18. LX: Inductor Connection
  19. AGND: Analog Ground
  20. VREF: Reference Voltage Output
  21. OVLO: Overvoltage Lockout
  22. UVLO: Undervoltage Lockout
  23. SS/TRK: Soft-Start or Tracking Control
  24. SS/TRK: Soft-Start or Tracking Control
  25. SS/TRK: Soft-Start or Tracking Control
  26. SS/TRK: Soft-Start or Tracking Control
  27. SS/TRK: Soft-Start or Tracking Control
  28. SS/TRK: Soft-Start or Tracking Control

Functional Features

  1. Wide input voltage range allows for versatile applications.
  2. High efficiency operation minimizes power loss.
  3. Synchronous buck controller provides precise voltage regulation.
  4. Adjustable output voltage enables customization.
  5. External clock synchronization option enhances flexibility.
  6. Power good indicator ensures reliable operation.
  7. Overvoltage and undervoltage lockout protection safeguards the system.

Advantages

  • High efficiency operation reduces energy consumption.
  • Wide input voltage range accommodates various power sources.
  • Precise voltage regulation ensures stable performance.
  • Flexible external clock synchronization option.
  • Comprehensive protection features enhance system reliability.

Disadvantages

  • Limited maximum duty cycle may restrict certain applications.
  • Higher cost compared to non-integrated solutions.
  • Requires additional external components for complete functionality.

Working Principles

The LTC3876IFE is a high-performance synchronous buck controller designed for power management applications. It regulates the output voltage by controlling the duty cycle of the internal power switches. The input voltage is converted to the desired output voltage with high efficiency, minimizing power loss. The device offers various protection features such as overvoltage and undervoltage lockout, ensuring safe operation.

Detailed Application Field Plans

The LTC3876IFE can be used in a wide range of applications, including:

  1. Industrial equipment power supplies
  2. Telecommunications systems
  3. Automotive electronics
  4. Data center power distribution
  5. Renewable energy systems
  6. Consumer electronics

Detailed and Complete Alternative Models

  1. LTC3876HFE: Higher operating temperature range (-40°C to 150°C)
  2. LTC3876MFE: Smaller package size (16-Lead TSSOP)
  3. LTC3876IFE-1: Lower quiescent current (10µA)

These alternative models offer similar functionality and can be used as substitutes for the LTC3876IFE in various applications.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací LTC3876IFE v technických řešeních

Sure! Here are 10 common questions and answers related to the application of LTC3876IFE in technical solutions:

  1. Q: What is LTC3876IFE? A: LTC3876IFE is a high-performance synchronous buck-boost DC/DC controller IC manufactured by Linear Technology (now part of Analog Devices). It is designed for various power supply applications.

  2. Q: What is the input voltage range supported by LTC3876IFE? A: LTC3876IFE supports an input voltage range from 2.25V to 40V, making it suitable for a wide range of power supply designs.

  3. Q: What is the output voltage range supported by LTC3876IFE? A: The output voltage range of LTC3876IFE can be adjusted from 0.8V to 60V, providing flexibility for different voltage requirements.

  4. Q: Can LTC3876IFE operate in both buck and boost modes? A: Yes, LTC3876IFE is a versatile controller that can operate in both buck and boost modes, allowing it to step down or step up the input voltage as needed.

  5. Q: What is the maximum switching frequency of LTC3876IFE? A: The maximum switching frequency of LTC3876IFE is 2MHz, enabling efficient power conversion while minimizing the size of external components.

  6. Q: Does LTC3876IFE support synchronization with an external clock? A: Yes, LTC3876IFE provides the option to synchronize its switching frequency to an external clock signal, allowing for system-level coordination.

  7. Q: Can LTC3876IFE handle high current loads? A: Yes, LTC3876IFE is capable of driving high current loads with its integrated N-channel MOSFETs and robust control circuitry.

  8. Q: Does LTC3876IFE offer protection features? A: Yes, LTC3876IFE includes various protection features such as overvoltage protection, undervoltage lockout, and thermal shutdown to ensure safe operation.

  9. Q: What type of control loop does LTC3876IFE use? A: LTC3876IFE utilizes a voltage-mode control loop, which provides good transient response and stability in power supply applications.

  10. Q: Are evaluation boards or reference designs available for LTC3876IFE? A: Yes, Analog Devices provides evaluation boards and reference designs for LTC3876IFE, making it easier for designers to evaluate and implement the IC in their applications.

Please note that these answers are general and may vary depending on specific application requirements. It is always recommended to refer to the LTC3876IFE datasheet and relevant application notes for detailed information.