LT3976EUDD

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High efficiency, compact size, wide input voltage range
• Package: 16-Lead 4mm x 3mm DFN
• Essence: Step-down DC/DC converter
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 2.75V to 38V
• Output Voltage Range: 0.8V to VIN
• Switching Frequency: Up to 2MHz
• Maximum Output Current: 3A
• Efficiency: Up to 95%
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

1. VIN: Input Voltage
2. SW: Switch Node Connection
3. GND: Ground
4. FB: Feedback Voltage Input
5. SS: Soft-Start Capacitor Connection
6. VCC: IC Supply Voltage
7. PGND: Power Ground
8. SYNC/SS/TRK: Synchronization, Soft-Start, or Tracking Control
9. VOUT: Output Voltage
10. COMP: Compensation Node
11. RT: Timing Resistor Connection
12. SS/TRK: Soft-Start or Tracking Control
13. BST: Bootstrap Capacitor Connection
14. EN/UVLO: Enable or Undervoltage Lockout
15. AGND: Analog Ground
16. PG: Power Good Indicator

Functional Features

• Wide input voltage range allows for versatile applications
• High efficiency conversion minimizes power loss
• Compact size enables space-saving designs
• Adjustable output voltage provides flexibility
• Synchronization capability for multi-phase operation
• Soft-start and tracking control for smooth startup
• Power good indicator for system monitoring

Advantages and Disadvantages

Advantages: - Wide input voltage range allows for use in various applications - High efficiency conversion reduces power consumption - Compact size enables integration into space-constrained designs - Adjustable output voltage provides flexibility for different requirements - Synchronization capability allows for multi-phase operation, reducing ripple and improving performance - Soft-start and tracking control ensure smooth startup and stable operation - Power good indicator enhances system monitoring and fault detection

Disadvantages: - Limited maximum output current of 3A may not be suitable for high-power applications - Operating temperature range of -40°C to 125°C may restrict usage in extreme environments

Working Principles

The LT3976EUDD is a step-down DC/DC converter that utilizes a high efficiency switching regulator to convert a higher input voltage to a lower output voltage. It employs a synchronous rectification topology to minimize power loss and maximize efficiency. The IC regulates the output voltage by adjusting the duty cycle of the internal switches based on feedback from the FB pin. The device also features soft-start and tracking control functions to ensure smooth startup and stable operation.

Detailed Application Field Plans

The LT3976EUDD is well-suited for a wide range of applications, including but not limited to:

1. Industrial equipment power supplies
2. Automotive electronics
3. Telecommunications systems
4. Battery-powered devices
5. LED lighting
6. Distributed power systems
7. Portable medical devices
8. Consumer electronics

Detailed and Complete Alternative Models

1. LT3976EFE: 16-Lead TSSOP package, similar specifications
2. LT3976IMSE: 16-Lead MSOP package, similar specifications
3. LT3976HFE: 16-Lead TSSOP package, extended temperature range
4. LT3976HMSE: 16-Lead MSOP package, extended temperature range

These alternative models offer similar functionality and performance to the LT3976EUDD, providing options for different package preferences or operating conditions.

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