LTC3859ALHFE#TRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High efficiency synchronous step-down DC/DC controller - Wide input voltage range: 4.5V to 38V - Output voltage adjustable from 0.6V to 5.5V - Constant frequency current mode control - Programmable soft-start - Overvoltage and overcurrent protection - Thermal shutdown

Package: 38-Lead Plastic QFN (5mm x 7mm)

Essence: The LTC3859ALHFE#TRPBF is a high-performance synchronous step-down DC/DC controller designed for power management applications.

Packaging/Quantity: The LTC3859ALHFE#TRPBF is available in a 38-lead plastic QFN package. The quantity per reel is 2500 pieces.

Specifications

• Input Voltage Range: 4.5V to 38V
• Output Voltage Range: 0.6V to 5.5V
• Switching Frequency: Up to 2MHz
• Maximum Duty Cycle: 90%
• Operating Temperature Range: -40°C to 125°C
• Efficiency: Up to 95%

Pin Configuration

The LTC3859ALHFE#TRPBF has the following pin configuration:

1. VIN: Input voltage
2. PGND: Power ground
3. SS/TR/UVLO: Soft-start, tracking, and undervoltage lockout control pin
4. FB: Feedback voltage input
5. COMP: Compensation node for loop stability
6. VCC: Controller supply voltage
7. SYNC: Synchronization input/output
8. GATE: Gate drive output
9. BOOT: Bootstrap capacitor connection
10. SW: Switch node connection
11. VOUT: Output voltage

(Note: The pin configuration includes additional pins not listed here.)

Functional Features

• High efficiency power conversion
• Wide input voltage range for versatile applications
• Adjustable output voltage for flexibility
• Constant frequency current mode control for stable operation
• Programmable soft-start for controlled startup
• Overvoltage and overcurrent protection for system safety
• Thermal shutdown to prevent overheating

Advantages and Disadvantages

Advantages: - High efficiency operation saves energy - Wide input voltage range allows compatibility with various power sources - Adjustable output voltage meets different requirements - Comprehensive protection features enhance system reliability - Compact package size for space-constrained applications

Disadvantages: - Limited maximum duty cycle may restrict certain applications - Higher cost compared to non-synchronous DC/DC controllers

Working Principles

The LTC3859ALHFE#TRPBF operates as a synchronous step-down DC/DC controller. It uses a constant frequency current mode control scheme to regulate the output voltage. The controller adjusts the duty cycle of the switching transistor to maintain a stable output voltage, even with varying input and load conditions. The feedback voltage is compared to a reference voltage, and any deviation is used to adjust the duty cycle accordingly.

Detailed Application Field Plans

The LTC3859ALHFE#TRPBF is suitable for a wide range of power management applications, including but not limited to: - Industrial equipment - Telecom infrastructure - Automotive systems - Power supplies - Battery-powered devices - LED lighting

Detailed and Complete Alternative Models

1. LTC3859AHFE#TRPBF
2. LTC3859BHFE#TRPBF
3. LTC3859CHFE#TRPBF
4. LTC3859DHFE#TRPBF
5. LTC3859EHFE#TRPBF

(Note: The list includes alternative models from the LTC3859 series.)

This concludes the encyclopedia entry for LTC3859ALHFE#TRPBF, providing an overview of its product details, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.