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LT3759IMSE#PBF
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LT3759IMSE#PBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High efficiency - Wide input voltage range - Adjustable output voltage - Current mode control - Internal compensation - Synchronous rectification - Programmable soft-start - Overvoltage protection - Undervoltage lockout - Thermal shutdown

Package: MSOP-16E

Essence: The LT3759IMSE#PBF is a high-efficiency, wide input voltage range, step-down DC/DC converter. It is designed for power management applications and offers various features to ensure reliable and efficient operation.

Packaging/Quantity: The LT3759IMSE#PBF is available in a standard MSOP-16E package. The quantity per reel is typically 2500 units.

Specifications

  • Input Voltage Range: 4V to 36V
  • Output Voltage Range: 0.97V to VIN
  • Switching Frequency: Up to 2MHz
  • Maximum Output Current: 5A
  • Efficiency: Up to 95%
  • Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LT3759IMSE#PBF has the following pin configuration:

  1. VIN: Input Voltage
  2. GND: Ground
  3. FB: Feedback Pin
  4. VCC: Supply Voltage
  5. SYNC: Synchronization Pin
  6. SS/TRK: Soft-Start/Tracking Pin
  7. RT: Oscillator Timing Resistor
  8. CT: Oscillator Timing Capacitor
  9. SW: Switch Node
  10. PGND: Power Ground
  11. COMP: Compensation Pin
  12. SS/TRK: Soft-Start/Tracking Pin
  13. VOUT: Output Voltage
  14. VOUT: Output Voltage
  15. VOUT: Output Voltage
  16. VOUT: Output Voltage

Functional Features

  • High efficiency conversion
  • Wide input voltage range for versatile applications
  • Adjustable output voltage to meet specific requirements
  • Current mode control for stable operation
  • Internal compensation simplifies design
  • Synchronous rectification improves efficiency
  • Programmable soft-start for controlled startup
  • Overvoltage protection safeguards the circuit
  • Undervoltage lockout prevents improper operation
  • Thermal shutdown protects against overheating

Advantages and Disadvantages

Advantages: - High efficiency leads to energy savings - Wide input voltage range allows for flexibility in power sources - Adjustable output voltage accommodates various loads - Current mode control ensures stability and fast transient response - Internal compensation simplifies external component count - Synchronous rectification improves overall efficiency - Programmable soft-start reduces inrush current during startup - Comprehensive protection features enhance reliability

Disadvantages: - Limited maximum output current of 5A may not be suitable for high-power applications - MSOP-16E package may require additional thermal management for certain operating conditions

Working Principles

The LT3759IMSE#PBF operates as a step-down DC/DC converter using a current mode control architecture. It regulates the output voltage by adjusting the duty cycle of the internal power switch. The device utilizes an internal compensation network, which simplifies the external component count and facilitates ease of use.

The converter employs synchronous rectification to minimize power losses during switching transitions. It also incorporates programmable soft-start functionality to limit the inrush current during startup, preventing excessive stress on the components.

Various protection features, such as overvoltage protection, undervoltage lockout, and thermal shutdown, ensure safe and reliable operation under different operating conditions.

Detailed Application Field Plans

The LT3759IMSE#PBF is suitable for a wide range of power management applications, including but not limited to: - Industrial equipment - Automotive systems - Telecommunications infrastructure - Distributed power supplies - Battery-powered devices - LED lighting

The device's high efficiency, wide input voltage range, and adjustable output voltage make it versatile for various application scenarios.

Detailed and Complete Alternative Models

  1. LT3759EMSE#PBF: Similar to LT3759IMSE#PBF, but with extended temperature range (-40°C to 150°C).
  2. LT3759HMSE#PBF: Higher maximum output current of 8A.
  3. LT3759IMSE-1#PBF: Same specifications as LT3759IMSE#PBF, but with an alternative pin configuration.

These alternative models offer similar functionality with slight variations to cater to specific requirements.

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Senaraikan 10 soalan dan jawapan biasa yang berkaitan dengan aplikasi LT3759IMSE#PBF dalam penyelesaian teknikal

Sure! Here are 10 common questions and answers related to the application of LT3759IMSE#PBF in technical solutions:

  1. Q: What is the LT3759IMSE#PBF? A: The LT3759IMSE#PBF is a high voltage, current mode DC/DC controller designed for step-down (buck) applications.

  2. Q: What is the input voltage range of the LT3759IMSE#PBF? A: The LT3759IMSE#PBF can operate with an input voltage range from 4V to 100V.

  3. Q: What is the maximum output current that the LT3759IMSE#PBF can handle? A: The LT3759IMSE#PBF can handle a maximum output current of up to 20A.

  4. Q: Can the LT3759IMSE#PBF be used for both step-up and step-down applications? A: No, the LT3759IMSE#PBF is specifically designed for step-down (buck) applications only.

  5. Q: Does the LT3759IMSE#PBF require an external MOSFET? A: Yes, the LT3759IMSE#PBF requires an external N-channel MOSFET for its operation.

  6. Q: What is the switching frequency range of the LT3759IMSE#PBF? A: The LT3759IMSE#PBF has a programmable switching frequency range from 100kHz to 500kHz.

  7. Q: Can the LT3759IMSE#PBF operate in a synchronous rectification mode? A: Yes, the LT3759IMSE#PBF supports synchronous rectification for improved efficiency.

  8. Q: Does the LT3759IMSE#PBF have built-in protection features? A: Yes, the LT3759IMSE#PBF includes various protection features like overvoltage protection, overcurrent protection, and thermal shutdown.

  9. Q: What is the typical efficiency of the LT3759IMSE#PBF? A: The typical efficiency of the LT3759IMSE#PBF can reach up to 95% depending on the application and operating conditions.

  10. Q: Are there any evaluation boards or reference designs available for the LT3759IMSE#PBF? A: Yes, Linear Technology (now part of Analog Devices) provides evaluation boards and reference designs for the LT3759IMSE#PBF, which can help in designing and testing applications using this controller.

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