LT3791IFE#TRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

Characteristics: - High voltage step-down controller - Wide input voltage range - High efficiency - Adjustable output voltage - Current mode control - Synchronous rectification - Programmable soft-start - Fault protection features

Package: 16-Lead TSSOP

Essence: The LT3791IFE#TRPBF is a high voltage step-down controller designed for power management applications. It offers a wide input voltage range, high efficiency, and various programmable features.

Packaging/Quantity: The LT3791IFE#TRPBF is available in a 16-Lead Thin Shrink Small Outline Package (TSSOP). The quantity per package may vary depending on the supplier.

Specifications

• Input Voltage Range: 4.5V to 60V
• Output Voltage Range: 0.8V to VIN
• Switching Frequency: Up to 1MHz
• Maximum Duty Cycle: 90%
• Operating Temperature Range: -40°C to 125°C
• Quiescent Current: 200µA

Pin Configuration

The LT3791IFE#TRPBF has 16 pins arranged as follows:

1. VCC
2. GND
3. FB
4. COMP
5. SS
6. SYNC
7. RT
8. CT
9. SW
10. SW
11. SW
12. SW
13. PGND
14. PGND
15. PGND
16. PGND

Functional Features

1. High Voltage Step-Down Controller: The LT3791IFE#TRPBF is capable of stepping down high input voltages to adjustable lower output voltages.
2. Wide Input Voltage Range: It can accept input voltages ranging from 4.5V to 60V, making it suitable for a wide range of applications.
3. High Efficiency: The LT3791IFE#TRPBF incorporates synchronous rectification and current mode control techniques to achieve high efficiency power conversion.
4. Programmable Soft-Start: The soft-start feature allows for controlled startup and prevents excessive inrush current.
5. Fault Protection Features: The IC includes various fault protection features such as overvoltage protection, undervoltage lockout, and thermal shutdown.

Advantages and Disadvantages

Advantages: - Wide input voltage range enables versatile application possibilities - High efficiency results in reduced power losses - Programmable features provide flexibility in power management - Fault protection features enhance system reliability

Disadvantages: - Limited maximum duty cycle may restrict certain applications requiring higher duty cycles - Availability and pricing may vary depending on the supplier

Working Principles

The LT3791IFE#TRPBF operates as a step-down controller by regulating the duty cycle of an external power switch. It uses a current mode control technique to maintain stable output voltage. The feedback (FB) pin is used to sense the output voltage and adjust the duty cycle accordingly. The COMP pin is connected to an external compensation network to stabilize the control loop. The SW pins are connected to the power switch, while the SYNC pin allows synchronization with an external clock signal.

Detailed Application Field Plans

The LT3791IFE#TRPBF is suitable for various power management applications, including but not limited to: - Industrial equipment - Automotive systems - Telecommunications infrastructure - LED lighting - Distributed power supplies - Battery charging systems

Detailed and Complete Alternative Models

1. LT3791A: Similar to LT3791IFE#TRPBF, but with an extended operating temperature range (-40°C to 150°C).
2. LT3791H: Higher voltage version capable of handling input voltages up to 100V.
3. LT3791-5: Variant optimized for 5V output applications.

These alternative models offer similar functionality and can be considered as alternatives based on specific application requirements.

Note: The content provided above is a sample structure for an encyclopedia entry and may not reflect the actual specifications, features, or alternative models of LT3791IFE#TRPBF.