LT3955IUHE#PBF

Product Overview

Category

The LT3955IUHE#PBF belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This IC is primarily used for controlling and regulating power in various electronic devices and systems.

Characteristics

• High efficiency: The LT3955IUHE#PBF offers high efficiency power conversion, minimizing energy loss during operation.
• Wide input voltage range: It can handle a wide range of input voltages, making it suitable for diverse applications.
• Adjustable output voltage: The IC allows for adjustable output voltage levels, providing flexibility in power supply design.
• Current mode control: It utilizes current mode control architecture, ensuring stable and reliable power regulation.

Package

The LT3955IUHE#PBF is available in a compact and industry-standard 28-lead thermally enhanced TSSOP package.

Essence

The essence of LT3955IUHE#PBF lies in its ability to efficiently manage power conversion, enabling reliable and optimized performance in electronic devices.

Packaging/Quantity

This IC is typically packaged in reels, with each reel containing a specific quantity of LT3955IUHE#PBF units. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Input Voltage Range: 4V to 60V
• Output Voltage Range: 0.8V to 55V
• Maximum Switching Frequency: 1MHz
• Operating Temperature Range: -40°C to 125°C
• Maximum Power Dissipation: 2.5W

Detailed Pin Configuration

The LT3955IUHE#PBF features a total of 28 pins, each serving a specific function. The pin configuration is as follows:

1. VIN: Input voltage pin
2. SW: Switching node connection
3. GND: Ground reference
4. FB: Feedback pin for output voltage regulation
5. VCC: Supply voltage input for internal circuitry
6. SYNC: Synchronization input for external clock signal
7. SS/TR: Soft-start and tracking control pin
8. RT/CLKOUT: External resistor connection for setting switching frequency or generating a clock output
9. CLKIN: Clock input pin
10. EN/UVLO: Enable and undervoltage lockout control pin
11. PGND: Power ground reference
12. ITH: Current sense threshold setting pin
13. COMP: Compensation pin for loop stability
14. BST: Bootstrap capacitor connection
15. LX: Inductor connection 16-28. NC: No connection pins

Functional Features

The LT3955IUHE#PBF offers several functional features that enhance its performance and usability:

1. Wide input voltage range allows for compatibility with various power sources.
2. Adjustable output voltage enables customization according to specific application requirements.
3. Current mode control architecture ensures stable and reliable power regulation.
4. Synchronization input facilitates synchronization with an external clock signal.
5. Soft-start and tracking control enable controlled startup and tracking of the output voltage.
6. Undervoltage lockout protects against low input voltage conditions.

Advantages and Disadvantages

Advantages

• High efficiency power conversion minimizes energy loss.
• Wide input voltage range provides versatility in power supply design.
• Adjustable output voltage allows for customization.
• Current mode control ensures stable and reliable power regulation.

Disadvantages

• Limited maximum power dissipation may restrict usage in high-power applications.
• Requires careful consideration of external components for optimal performance.

Working Principles

The LT3955IUHE#PBF operates based on a current mode control architecture. It regulates the output voltage by adjusting the duty cycle of the internal power switch. This control mechanism ensures stable and efficient power conversion.

Detailed Application Field Plans

The LT3955IUHE#PBF finds applications in various fields, including but not limited to:

1. Automotive electronics: Power management in automotive systems, such as infotainment systems, lighting, and motor control.
2. Industrial automation: Control and regulation of power in industrial equipment and machinery.
3. Telecommunications: Power supply design for telecommunications infrastructure and devices.
4. Renewable energy: Integration into solar power systems and other renewable energy applications.
5. Consumer electronics: Power management in portable devices, home appliances, and audio/video equipment.

Detailed and Complete Alternative Models

1. LT3955A: Similar functionality with enhanced features for specific applications.
2. LT3955B: Variant optimized for higher power dissipation requirements.
3. LT3955C: Compact version with reduced pin count for space-constrained designs.
4. LT3955D: Enhanced model with additional protection features for rugged environments.

These alternative models offer similar power management capabilities while catering to specific application needs.

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