LT3755EUD#PBF

Product Overview

Category

The LT3755EUD#PBF belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This IC is commonly used in various power supply designs, including LED drivers, automotive lighting systems, and general-purpose DC-DC converters.

Characteristics

• High efficiency: The LT3755EUD#PBF offers high efficiency power conversion, minimizing energy losses.
• Wide input voltage range: It can operate with input voltages ranging from 3V to 40V, making it suitable for a wide range of applications.
• Adjustable output voltage: The output voltage can be adjusted using external resistors, providing flexibility in power supply design.
• Current mode control: The IC utilizes current mode control for stable and reliable operation.

Package

The LT3755EUD#PBF is available in a 16-pin QFN (Quad Flat No-Lead) package. This package offers compact size and good thermal performance.

Essence

The essence of the LT3755EUD#PBF lies in its ability to efficiently regulate and convert electrical power, enabling reliable and optimized operation of various electronic devices.

Packaging/Quantity

The LT3755EUD#PBF is typically sold in reels or tubes, containing a specified quantity of ICs per package. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Input Voltage Range: 3V to 40V
• Output Voltage Range: Adjustable
• Maximum Output Current: Up to 5A
• Switching Frequency: Adjustable up to 1MHz
• Operating Temperature Range: -40°C to 125°C
• Package Type: 16-pin QFN

Detailed Pin Configuration

1. VIN: Input voltage pin
2. GND: Ground reference pin
3. VCC: IC power supply pin
4. FB: Feedback pin for output voltage regulation
5. COMP: Compensation pin for stability control
6. SS: Soft-start pin for controlled startup
7. RT/CLK: External resistor or clock input for switching frequency control
8. SYNC: Synchronization input for multiple ICs
9. SW: Switching node connection for power conversion
10. BST: Boost capacitor connection for high-side switch
11. PGND: Power ground reference pin
12. LX: Inductor connection for power conversion
13. ADJ: Output voltage adjustment pin
14. OVLO: Overvoltage lockout pin
15. EN/UVLO: Enable and undervoltage lockout control pin
16. VOUT: Output voltage pin

Functional Features

• High-efficiency step-up (boost) converter
• Adjustable output voltage through external resistors
• Current mode control for stable operation
• Programmable switching frequency
• Synchronization capability for multi-IC applications
• Soft-start function for controlled startup
• Overvoltage lockout protection
• Enable and undervoltage lockout control

Advantages and Disadvantages

Advantages

• High efficiency power conversion
• Wide input voltage range
• Adjustable output voltage
• Compact package size
• Current mode control for stability

Disadvantages

• Requires external components for complete power supply design
• Limited maximum output current compared to some other ICs in the same category

Working Principles

The LT3755EUD#PBF operates as a high-efficiency step-up (boost) converter. It regulates the output voltage by controlling the duty cycle of the internal power switch. The IC utilizes current mode control, where the inductor current is sensed and compared to a reference signal to adjust the duty cycle.

During operation, the input voltage is boosted to a higher output voltage level, which can be adjusted using external resistors. The IC incorporates various protection features such as overvoltage lockout and undervoltage lockout to ensure safe and reliable operation.

Detailed Application Field Plans

The LT3755EUD#PBF finds applications in various fields, including:

1. LED Drivers: The IC is commonly used in LED lighting systems, providing efficient power conversion for driving high-brightness LEDs.
2. Automotive Lighting: It is utilized in automotive lighting applications, enabling reliable and regulated power supply for headlights, taillights, and other lighting modules.
3. General-Purpose DC-DC Converters: The LT3755EUD#PBF can be employed in general-purpose DC-DC converter designs, offering flexibility and efficiency in power conversion.

Detailed and Complete Alternative Models

1. LT3754EUD#PBF: Similar to LT3755EUD#PBF with minor differences in specifications and pin configuration.
2. LT3756EUD#PBF: Higher maximum output current compared to LT3755EUD#PBF, suitable for applications requiring higher