Linear Technology/Analog Devices
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LTC3728IUH#PBF
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LTC3728IUH#PBF

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High Efficiency, Wide Input Voltage Range, Synchronous Step-Down DC/DC Controller
  • Package: 32-Lead QFN (Quad Flat No-Lead)
  • Essence: LTC3728IUH#PBF is a high-performance synchronous step-down DC/DC controller designed for power management applications.
  • Packaging/Quantity: The LTC3728IUH#PBF is available in a 32-Lead QFN package and is typically sold in reels of 2500 units.

Specifications

The LTC3728IUH#PBF offers the following specifications:

  • Input Voltage Range: 4.5V to 36V
  • Output Voltage Range: 0.6V to VIN
  • Switching Frequency: Up to 550kHz
  • Maximum Duty Cycle: 90%
  • Operating Temperature Range: -40°C to 125°C
  • Quiescent Current: 100μA

Pin Configuration

The LTC3728IUH#PBF features a 32-Lead QFN package with the following pin configuration:

  1. VIN
  2. PGND
  3. SW
  4. VCC
  5. FB
  6. SYNC
  7. SS/TR/SS
  8. GATE
  9. AGND
  10. COMP
  11. RT
  12. ITH
  13. PGOOD
  14. VOUT
  15. VOUT
  16. VOUT
  17. VOUT
  18. VOUT
  19. VOUT
  20. VOUT
  21. VOUT
  22. VOUT
  23. VOUT
  24. VOUT
  25. VOUT
  26. VOUT
  27. VOUT
  28. VOUT
  29. VOUT
  30. VOUT
  31. VOUT
  32. VOUT

Functional Features

The LTC3728IUH#PBF offers the following functional features:

  • High Efficiency Power Conversion
  • Wide Input Voltage Range for Versatile Applications
  • Synchronous Rectification for Improved Efficiency
  • Adjustable Output Voltage
  • Programmable Soft-Start
  • Current Mode Control for Stable Operation
  • Overvoltage and Undervoltage Protection
  • Thermal Shutdown Protection

Advantages and Disadvantages

Advantages of the LTC3728IUH#PBF include:

  • High Efficiency Power Conversion
  • Wide Input Voltage Range
  • Synchronous Rectification for Improved Efficiency
  • Programmable Soft-Start for Controlled Startup
  • Comprehensive Protection Features

Disadvantages of the LTC3728IUH#PBF include:

  • Limited Maximum Duty Cycle (90%)
  • Requires External Components for Complete Circuit Implementation

Working Principles

The LTC3728IUH#PBF operates as a synchronous step-down DC/DC controller. It utilizes a current mode control scheme to regulate the output voltage. The input voltage is stepped down to the desired output voltage using high-frequency switching and synchronous rectification. The controller provides various protection features to ensure safe operation under different conditions.

Application Field Plans

The LTC3728IUH#PBF can be used in various power management applications, including but not limited to:

  • Industrial Power Supplies
  • Telecom Infrastructure
  • Automotive Electronics
  • Portable Devices
  • Distributed Power Systems

Alternative Models

In addition to the LTC3728IUH#PBF, there are several alternative models available that offer similar functionality and performance. Some of the notable alternatives include:

  • LTC3728EG#PBF
  • LTC3728EUH#PBF
  • LTC3728EGN#PBF
  • LTC3728EUHGN#PBF

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

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací LTC3728IUH#PBF v technických řešeních

Sure! Here are 10 common questions and answers related to the application of LTC3728IUH#PBF in technical solutions:

  1. Q: What is LTC3728IUH#PBF? A: LTC3728IUH#PBF is a high-performance synchronous step-down DC/DC controller IC manufactured by Linear Technology (now part of Analog Devices). It is commonly used in power supply applications.

  2. Q: What is the input voltage range supported by LTC3728IUH#PBF? A: The input voltage range supported by LTC3728IUH#PBF is typically between 4.5V and 36V.

  3. Q: What is the output voltage range that can be achieved using LTC3728IUH#PBF? A: The output voltage range that can be achieved using LTC3728IUH#PBF depends on the external components used, but it can typically range from 0.6V to 34V.

  4. Q: What is the maximum output current that LTC3728IUH#PBF can handle? A: LTC3728IUH#PBF can handle a maximum output current of up to 20A, depending on the design and thermal considerations.

  5. Q: Does LTC3728IUH#PBF support synchronous rectification? A: Yes, LTC3728IUH#PBF supports synchronous rectification, which improves efficiency by reducing power losses.

  6. Q: Can LTC3728IUH#PBF operate in a wide temperature range? A: Yes, LTC3728IUH#PBF is designed to operate in a wide temperature range, typically from -40°C to 125°C.

  7. Q: Does LTC3728IUH#PBF have any built-in protection features? A: Yes, LTC3728IUH#PBF has various built-in protection features such as overvoltage protection (OVP), undervoltage lockout (UVLO), and thermal shutdown.

  8. Q: Can LTC3728IUH#PBF be used in battery-powered applications? A: Yes, LTC3728IUH#PBF can be used in battery-powered applications as it supports a wide input voltage range and has low quiescent current.

  9. Q: What type of control method does LTC3728IUH#PBF use? A: LTC3728IUH#PBF uses voltage mode control, which provides good transient response and stability.

  10. Q: Are there any evaluation boards or reference designs available for LTC3728IUH#PBF? A: Yes, Analog Devices provides evaluation boards and reference designs for LTC3728IUH#PBF, which can help users quickly prototype their power supply solutions.

Please note that the answers provided here are general and may vary depending on specific application requirements and design considerations. It is always recommended to refer to the datasheet and application notes provided by the manufacturer for detailed information.