LT8705MPFE#PBF

Product Overview

Category

LT8705MPFE#PBF belongs to the category of integrated circuits (ICs).

Use

The LT8705MPFE#PBF is primarily used as a high-performance synchronous buck-boost DC/DC converter.

Characteristics

• High efficiency and wide input voltage range
• Synchronous rectification for improved efficiency
• Adjustable and programmable output voltage and current limits
• Integrated power switches for compact design
• Fault protection features for enhanced reliability

Package

LT8705MPFE#PBF is available in a 28-lead plastic TSSOP package.

Essence

The essence of LT8705MPFE#PBF lies in its ability to efficiently convert DC power from a wide input voltage range to a regulated output voltage, making it suitable for various applications.

Packaging/Quantity

LT8705MPFE#PBF is typically packaged in reels and comes in quantities of 250 units per reel.

Specifications

• Input Voltage Range: 2.8V to 80V
• Output Voltage Range: -4V to 80V
• Switching Frequency: Up to 750kHz
• Maximum Continuous Output Current: 3A
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

1. VIN: Input voltage pin
2. GND: Ground reference pin
3. SW: Switching node connection
4. FB: Feedback pin for output voltage regulation
5. SS/TRK: Soft-start/tracking control pin
6. VCC: Supply voltage for internal circuitry
7. PGND: Power ground pin
8. SYNC/MODE: External synchronization or mode selection pin
9. RT/CLKOUT: Resistor timing or clock output pin
10. ITH: Current limit setting pin
11. SS/TRK: Soft-start/tracking control pin
12. VFB: Feedback voltage output pin
13. VOUT: Output voltage pin
14. PGND: Power ground pin
15. SW: Switching node connection
16. GND: Ground reference pin
17. VIN: Input voltage pin
18. VCC: Supply voltage for internal circuitry
19. SYNC/MODE: External synchronization or mode selection pin
20. RT/CLKOUT: Resistor timing or clock output pin
21. ITH: Current limit setting pin
22. FB: Feedback pin for output voltage regulation
23. SS/TRK: Soft-start/tracking control pin
24. VFB: Feedback voltage output pin
25. VOUT: Output voltage pin
26. PGND: Power ground pin
27. SW: Switching node connection
28. GND: Ground reference pin

Functional Features

• Buck-boost topology for wide input voltage range operation
• Adjustable and programmable output voltage and current limits
• Synchronous rectification for improved efficiency
• Soft-start and tracking control for smooth startup
• Fault protection features including overvoltage, overcurrent, and thermal shutdown

Advantages and Disadvantages

Advantages

• High efficiency conversion across a wide input voltage range
• Compact design with integrated power switches
• Programmable output voltage and current limits for flexibility
• Fault protection features enhance reliability

Disadvantages

• Limited maximum continuous output current (3A)
• Requires careful consideration of thermal management due to high operating temperature range

Working Principles

LT8705MPFE#PBF operates on the buck-boost topology, allowing it to regulate the output voltage regardless of whether the input voltage is higher or lower than the desired output voltage. It utilizes synchronous rectification to minimize power losses and improve overall efficiency. The device incorporates various control mechanisms to ensure stable and reliable operation, including soft-start and tracking control for smooth startup, as well as fault protection features such as overvoltage, overcurrent, and thermal shutdown.

Detailed Application Field Plans

LT8705MPFE#PBF finds applications in a wide range of fields, including but not limited to: - Automotive electronics - Industrial automation - Telecommunications - Renewable energy systems - Battery-powered devices

Its ability to efficiently convert power across a wide input voltage range makes it suitable for various voltage regulation requirements in these fields.

Detailed and Complete Alternative Models

1. LT8705: Similar specifications and features, available in a different package (e.g., QFN)
2. LT8706: Higher maximum continuous output current (up to 5A), otherwise similar specifications and features
3. LT8708: Lower maximum continuous output current (up to 2A), otherwise similar specifications and features

These alternative models offer similar functionality with slight variations in specifications, allowing users to choose the most suitable option based on their specific requirements.

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