LT8711EUDC#PBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High efficiency - Wide input voltage range - Adjustable output voltage - Synchronous rectification - Low quiescent current - Compact size

Package: 16-Lead QFN

Essence: The LT8711EUDC#PBF is a high-efficiency synchronous buck-boost DC/DC converter designed for power management applications.

Packaging/Quantity: The LT8711EUDC#PBF is available in a 16-Lead QFN package. It is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 2.8V to 40V
• Output Voltage Range: 2.8V to 40V
• Switching Frequency: Up to 750kHz
• Maximum Output Current: 4A
• Quiescent Current: 20µA
• Efficiency: Up to 98%
• Operating Temperature Range: -40°C to 125°C

Pin Configuration

The LT8711EUDC#PBF has the following pin configuration:

1. VIN: Input voltage pin
2. SW: Switching node connection
3. GND: Ground reference
4. FB: Feedback pin for output voltage regulation
5. VOUT: Output voltage pin
6. SS/TR: Soft-start and tracking control pin
7. SYNC/MODE: External synchronization or mode selection pin
8. PGND: Power ground reference
9. BST: Boost capacitor connection
10. VCC: Internal bias voltage supply
11. AGND: Analog ground reference
12. RT: Timing resistor connection
13. COMP: Compensation pin for loop stability
14. SS: Soft-start capacitor connection
15. SS/TR: Soft-start and tracking control pin
16. EN/UVLO: Enable and undervoltage lockout control pin

Functional Features

• Buck-boost topology for wide input voltage range operation
• Synchronous rectification for high efficiency
• Adjustable output voltage through feedback pin
• Internal compensation for simplified design
• Soft-start and tracking control for smooth startup
• External synchronization or mode selection capability
• Enable and undervoltage lockout control for system protection

Advantages and Disadvantages

Advantages: - High efficiency helps to reduce power consumption - Wide input voltage range allows for versatile applications - Adjustable output voltage provides flexibility - Synchronous rectification improves overall efficiency - Low quiescent current minimizes standby power consumption - Compact size enables space-saving designs

Disadvantages: - Limited maximum output current may not be suitable for high-power applications - Higher switching frequency may require careful PCB layout and component selection

Working Principles

The LT8711EUDC#PBF is a buck-boost DC/DC converter that utilizes a combination of inductor-based energy storage and synchronous rectification to efficiently convert the input voltage to the desired output voltage. It operates by controlling the duty cycle of the internal switches to regulate the output voltage based on the feedback signal.

During operation, the LT8711EUDC#PBF continuously monitors the output voltage through the feedback pin and adjusts the duty cycle accordingly to maintain the desired voltage level. The synchronous rectification feature reduces power losses by utilizing a low-side MOSFET to replace the diode typically found in non-synchronous converters.

The device also incorporates internal compensation, soft-start, and tracking control mechanisms to ensure stable and controlled startup. Additionally, it offers external synchronization and mode selection options for further customization.

Detailed Application Field Plans

The LT8711EUDC#PBF is suitable for a wide range of power management applications, including but not limited to: - Battery-powered devices - Industrial equipment - Automotive systems - Telecommunications infrastructure - Distributed power supplies - LED lighting

Its ability to operate over a wide input voltage range and provide adjustable output voltage makes it versatile for various application scenarios.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the LT8711EUDC#PBF include: - LT8705 - LT8708 - LT8709 - LT8710

These models are also buck-boost DC/DC converters with comparable features and specifications. However, it is recommended to refer to the respective datasheets for detailed information and suitability for specific applications.

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