LT8391HFE#PBF

Product Overview

Category

LT8391HFE#PBF belongs to the category of integrated circuits (ICs).

Use

The LT8391HFE#PBF is primarily used as a step-down DC/DC controller.

Characteristics

• Step-down DC/DC controller
• High efficiency
• Wide input voltage range
• Adjustable output voltage
• Current mode control
• Synchronous rectification
• Programmable soft-start
• Fault protection features

Package

LT8391HFE#PBF comes in a compact and durable package, suitable for various applications.

Essence

The essence of LT8391HFE#PBF lies in its ability to efficiently regulate and convert high input voltages to lower output voltages.

Packaging/Quantity

LT8391HFE#PBF is typically packaged in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Input Voltage Range: 4.5V to 100V
• Output Voltage Range: 0.8V to VIN
• Maximum Switching Frequency: 2MHz
• Operating Temperature Range: -40°C to 125°C
• Package Type: 16-Lead TSSOP

Detailed Pin Configuration

1. VCC: Power supply input
2. GND: Ground reference
3. FB: Feedback pin for output voltage regulation
4. COMP: Compensation pin for stability control
5. SS: Soft-start pin for gradual startup
6. RT: Timing resistor pin for adjustable switching frequency
7. SYNC: Synchronization pin for external clock synchronization
8. SW: Switch node connection for power transfer
9. PGND: Power ground reference
10. BST: Bootstrap capacitor connection for high-side MOSFET drive
11. VIN: Input voltage connection
12. VCC: Power supply input
13. GND: Ground reference
14. FB: Feedback pin for output voltage regulation
15. COMP: Compensation pin for stability control
16. SS: Soft-start pin for gradual startup

Functional Features

• Wide input voltage range allows for versatile applications
• Current mode control ensures stable and efficient operation
• Synchronous rectification improves overall efficiency
• Programmable soft-start enables controlled startup
• Fault protection features safeguard against overvoltage, undervoltage, and overcurrent conditions

Advantages and Disadvantages

Advantages

• High efficiency conversion
• Wide input voltage range
• Adjustable output voltage
• Comprehensive fault protection
• Compact package size

Disadvantages

• Limited maximum switching frequency
• Requires external components for complete functionality

Working Principles

LT8391HFE#PBF operates on the principle of current mode control, where the inductor current is sensed and regulated to achieve the desired output voltage. The controller adjusts the duty cycle of the switching transistor to maintain a constant output voltage, even with varying input voltages.

Detailed Application Field Plans

LT8391HFE#PBF finds applications in various fields, including: 1. Automotive electronics 2. Industrial power supplies 3. LED lighting systems 4. Telecommunications equipment 5. Renewable energy systems

Detailed and Complete Alternative Models

1. LT8390HFE#PBF
2. LT8392HFE#PBF
3. LT8393HFE#PBF
4. LT8394HFE#PBF
5. LT8395HFE#PBF

These alternative models offer similar functionality and can be considered as alternatives to LT8391HFE#PBF based on specific requirements.

In conclusion, LT8391HFE#PBF is a highly efficient step-down DC/DC controller with a wide input voltage range and adjustable output voltage. Its compact package, fault protection features, and current mode control make it suitable for various applications in automotive, industrial, lighting, telecommunications, and renewable energy fields. While it has limitations in terms of maximum switching frequency and external component requirements, there are alternative models available to cater to specific needs.