LT3491EDC#TRPBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power management
• Characteristics: High efficiency, compact size, adjustable output voltage, wide input voltage range
• Package: DFN-10 (3mm x 3mm)
• Essence: Step-up DC/DC converter
• Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Input Voltage Range: 2.5V to 16V
• Output Voltage Range: 4V to 30V
• Switching Frequency: 1MHz
• Maximum Output Current: 1A
• Efficiency: Up to 92%
• Operating Temperature Range: -40°C to 125°C

Pin Configuration

The LT3491EDC#TRPBF 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. EN: Enable pin for turning the device on/off
7. SS: Soft-start capacitor connection
8. PGND: Power ground reference
9. BST: Boost capacitor connection
10. COMP: Compensation pin for stability control

Functional Features

• High efficiency step-up DC/DC converter
• Adjustable output voltage through external resistors
• Wide input voltage range suitable for various applications
• Internal compensation for simplified design
• Low shutdown current for power-saving operation
• Soft-start function for controlled startup
• Overcurrent and overtemperature protection

Advantages

• Compact size and high efficiency make it ideal for space-constrained applications
• Wide input voltage range allows for flexibility in power source selection
• Adjustable output voltage provides versatility for different loads
• Internal compensation simplifies the design process
• Overcurrent and overtemperature protection enhance system reliability

Disadvantages

• Limited maximum output current of 1A may not be sufficient for high-power applications
• Operating temperature range of -40°C to 125°C may not be suitable for extreme environments

Working Principles

The LT3491EDC#TRPBF is a step-up DC/DC converter that converts a lower input voltage to a higher output voltage. It utilizes a switching regulator topology to achieve high efficiency power conversion. The device operates by rapidly switching an internal power switch, controlling the energy transfer from the input to the output.

When the input voltage is applied, the internal switch turns on and energy is stored in the boost capacitor. During the off-time of the switch, the energy is transferred to the output through an inductor and diode. The output voltage is regulated by adjusting the duty cycle of the internal switch based on the feedback signal.

Detailed Application Field Plans

The LT3491EDC#TRPBF is commonly used in various applications requiring step-up voltage conversion. Some specific application fields include:

1. Battery-powered devices: Portable electronics, handheld instruments, and wireless communication devices often require higher voltages than the available battery voltage.
2. LED lighting: The device can be used to drive multiple LEDs in series, providing efficient and regulated illumination.
3. Automotive systems: The wide input voltage range and compact size make it suitable for automotive applications such as infotainment systems, lighting controls, and sensors.
4. Industrial equipment: The LT3491EDC#TRPBF can be utilized in industrial automation, control systems, and instrumentation where efficient power management is crucial.

Detailed Alternative Models

1. LT3491EFE#TRPBF: Similar specifications and features, but in a TSSOP-16 package.
2. LT3491EMS#PBF: Similar specifications and features, but in a MSOP-10 package.
3. LT3491HFE#TRPBF: Higher maximum output current of 2A, suitable for higher power applications.

These alternative models provide similar functionality with slight variations in package type and maximum output current, allowing designers to choose the most suitable option for their specific requirements.

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