LT3791MPFE#TRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

Characteristics: - High efficiency step-down DC/DC controller - Wide input voltage range: 4.5V to 60V - Adjustable output voltage - Synchronous rectification for improved efficiency - Programmable soft-start - Overvoltage and overcurrent protection - Thermal shutdown

Package: 28-Lead Plastic TSSOP

Essence: The LT3791MPFE#TRPBF is a high-performance power management IC designed for step-down DC/DC conversion applications.

Packaging/Quantity: The LT3791MPFE#TRPBF is available in a plastic TSSOP package and is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 4.5V to 60V
• Output Voltage Range: Adjustable
• Switching Frequency: Up to 1MHz
• Maximum Duty Cycle: 90%
• Operating Temperature Range: -40°C to 125°C
• Efficiency: Up to 98%

Pin Configuration

The LT3791MPFE#TRPBF has the following pin configuration:

1. VIN: Input voltage
2. GND: Ground
3. FB: Feedback voltage
4. VCC: Supply voltage
5. SS: Soft-start control
6. SYNC: Synchronization input
7. RT: Oscillator frequency setting
8. SW: Switch node connection
9. PGND: Power ground
10. COMP: Compensation node
11. ITH: Current sense threshold
12. SS/TRK: Soft-start tracking
13. EN/UVLO: Enable/Undervoltage lockout
14. VFB: Feedback voltage
15. AGND: Analog ground
16. VCC: Supply voltage
17. PGND: Power ground
18. SW: Switch node connection
19. RT: Oscillator frequency setting
20. SYNC: Synchronization input
21. SS: Soft-start control
22. VCC: Supply voltage
23. FB: Feedback voltage
24. GND: Ground
25. VIN: Input voltage
26. EN/UVLO: Enable/Undervoltage lockout
27. SS/TRK: Soft-start tracking
28. ITH: Current sense threshold

Functional Features

• High-efficiency step-down DC/DC conversion
• Wide input voltage range for versatile applications
• Adjustable output voltage to meet specific requirements
• Synchronous rectification for improved efficiency
• Programmable soft-start for controlled startup
• Overvoltage and overcurrent protection for enhanced reliability
• Thermal shutdown to prevent overheating

Advantages and Disadvantages

Advantages: - High efficiency operation - Wide input voltage range - Adjustable output voltage - Comprehensive protection features - Compact package size

Disadvantages: - Limited maximum duty cycle (90%) - Requires external components for complete circuit implementation

Working Principles

The LT3791MPFE#TRPBF is a high-performance step-down DC/DC controller that utilizes a synchronous rectification topology. It operates by converting a higher input voltage to a lower output voltage with high efficiency. The IC incorporates various control and protection features to ensure reliable and safe operation.

The LT3791MPFE#TRPBF uses a feedback mechanism to regulate the output voltage based on the desired setpoint. It employs a pulse-width modulation (PWM) technique to control the duty cycle of the switching transistor, which in turn regulates the output voltage. The IC also includes a soft-start feature to gradually ramp up the output voltage during startup, reducing inrush current.

Detailed Application Field Plans

The LT3791MPFE#TRPBF is suitable for a wide range of applications, including but not limited to: - Industrial power supplies - Automotive electronics - LED lighting systems - Battery charging circuits - Telecom infrastructure - Renewable energy systems

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the LT3791MPFE#TRPBF include: - LT3790MPFE#TRPBF - LT3792MPFE#TRPBF - LT3793MPFE#TRPBF - LT3794MPFE#TRPBF - LT3795MPFE#TRPBF

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