LT3477EUF#PBF

Product Overview

Category

LT3477EUF#PBF belongs to the category of integrated circuits (ICs).

Use

The LT3477EUF#PBF is primarily used as a step-up DC/DC converter.

Characteristics

• Input Voltage Range: 2.5V to 16V
• Output Voltage Range: Up to 34V
• Switching Frequency: 1MHz
• Package Type: 4mm x 3mm DFN-12
• Efficiency: Up to 92%
• Operating Temperature Range: -40°C to 125°C

Packaging/Quantity

The LT3477EUF#PBF is available in a 12-pin DFN package. It is typically sold in reels with a quantity of 2500 units per reel.

Specifications

• Input Voltage Range: 2.5V to 16V
• Output Voltage Range: Up to 34V
• Maximum Output Current: 1A
• Switching Frequency: 1MHz
• Quiescent Current: 50μA
• Shutdown Current: <1μA
• Soft-Start Time: 500μs
• Duty Cycle: Up to 90%
• Operating Temperature Range: -40°C to 125°C

Pin Configuration

The LT3477EUF#PBF has a total of 12 pins. The pin configuration is as follows:

1. VIN: Input voltage pin
2. SW: Switch node connection
3. GND: Ground reference pin
4. FB: Feedback pin for output voltage regulation
5. SS: Soft-start capacitor connection
6. VCC: Internal regulator output pin
7. PGND: Power ground pin
8. LX: Inductor connection
9. EN: Enable pin for turning the device on/off
10. VOUT: Output voltage pin
11. COMP: Compensation pin for stability control
12. BST: Boost capacitor connection

Functional Features

• High efficiency step-up DC/DC converter
• Wide input voltage range allows for versatile applications
• Internal regulator provides stable output voltage
• Soft-start feature prevents excessive inrush current
• Enable pin for easy on/off control
• Compensation pin for stability optimization

Advantages and Disadvantages

Advantages

• High efficiency operation conserves power
• Wide input voltage range enables flexibility in usage
• Small package size saves board space
• Soft-start feature protects components from excessive current
• Stable output voltage ensures reliable performance

Disadvantages

• Limited maximum output current (1A)
• Higher switching frequency may require careful PCB layout design

Working Principles

The LT3477EUF#PBF is a step-up DC/DC converter that utilizes a high-frequency switching technique to boost the input voltage to a higher output voltage level. It employs an internal regulator to maintain a stable output voltage, even with varying input voltages. The device operates at a high switching frequency of 1MHz, allowing for smaller external components such as inductors and capacitors.

The enable pin (EN) can be used to turn the device on or off, providing control over the power supply. The soft-start feature gradually ramps up the output voltage, preventing excessive inrush current during startup. The compensation pin (COMP) allows for stability optimization by adjusting the feedback loop.

Detailed Application Field Plans

The LT3477EUF#PBF is suitable for various applications, including but not limited to:

1. Battery-powered devices requiring higher voltage levels
2. LED backlighting for LCD displays
3. Portable audio/video equipment
4. Industrial control systems
5. Automotive electronics
6. Distributed power systems

Detailed and Complete Alternative Models

1. LT3477EUF#TRPBF: Same specifications as LT3477EUF#PBF, but available in tape and reel packaging.
2. LT3477EUF#PBF-ND: Same specifications as LT3477EUF#PBF, available for purchase from authorized distributors.

These alternative models provide the same functionality and characteristics as the LT3477EUF#PBF, offering flexibility in sourcing and packaging options.

In conclusion, the LT3477EUF#PBF is a high-efficiency step-up DC/DC converter with a wide input voltage range and stable output voltage. Its small package size and various features make it suitable for a range of applications. However, it has limitations in terms of maximum output current and may require careful PCB layout design due to its higher switching frequency. Alternative models are available for different packaging and sourcing requirements.