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LT3477IUF#PBF
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LT3477IUF#PBF

Product Overview

The LT3477IUF#PBF is a high-efficiency, low-noise, 2.3MHz synchronous step-up DC/DC converter with an integrated output disconnect. This device is designed for use in various applications where a regulated output voltage must be generated from an input voltage higher than the output voltage. The LT3477IUF#PBF offers characteristics such as high efficiency, compact package, and versatile application possibilities.

Basic Information

  • Category: Power Management IC
  • Use: Step-up DC/DC Converter
  • Characteristics: High Efficiency, Low Noise, Integrated Output Disconnect
  • Package: 4mm × 3mm DFN-14
  • Essence: Efficient Voltage Boosting
  • Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

  • Input Voltage Range: 2.3V to 16V
  • Output Voltage Range: Up to 34V
  • Switching Frequency: 2.3MHz
  • Maximum Output Current: 500mA
  • Quiescent Current: 50µA
  • Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

  1. SW: Switch Node
  2. VIN: Input Voltage
  3. GND: Ground
  4. FB: Feedback Voltage
  5. SS/TR: Soft-Start/Tracking
  6. RT: Oscillator Frequency Set
  7. VOUT: Output Voltage
  8. PG: Power Good Indicator
  9. EN: Enable Pin
  10. BST: Bootstrap Capacitor Connection
  11. LX: Inductor Connection
  12. AGND: Analog Ground
  13. AGND: Analog Ground
  14. AGND: Analog Ground

Functional Features

  • High Efficiency Synchronous Operation
  • Integrated Output Disconnect
  • Low Quiescent Current
  • Soft-Start/Tracking Function
  • Power Good Indicator
  • Wide Input Voltage Range

Advantages and Disadvantages

Advantages

  • High Efficiency
  • Compact Package
  • Integrated Output Disconnect
  • Wide Input Voltage Range
  • Low Quiescent Current

Disadvantages

  • Limited Maximum Output Current (500mA)

Working Principles

The LT3477IUF#PBF operates by converting a lower input voltage to a higher output voltage using a synchronous step-up topology. The integrated output disconnect feature ensures that the output is disconnected from the input during shutdown, preventing leakage current and improving efficiency. The device also incorporates a soft-start/tracking function to minimize inrush current during startup.

Detailed Application Field Plans

The LT3477IUF#PBF is suitable for a wide range of applications including: - Battery-Powered Devices - Portable Instruments - LED Backlighting - Photoflash Capacitor Chargers - Positive-to-Negative Converters

Detailed and Complete Alternative Models

  • LT3477EUHF#PBF
  • LT3477IUHF#PBF
  • LT3477EUF#PBF
  • LT3477IUF#TRPBF

In conclusion, the LT3477IUF#PBF is a versatile and efficient step-up DC/DC converter suitable for various applications requiring regulated output voltage from a higher input voltage. Its compact package, high efficiency, and integrated features make it a compelling choice for power management solutions.

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Luettele 10 yleistä kysymystä ja vastausta, jotka liittyvät LT3477IUF#PBF :n soveltamiseen teknisissä ratkaisuissa

  1. What is the input voltage range of LT3477IUF#PBF?

    • The input voltage range of LT3477IUF#PBF is 2.8V to 36V.

  2. What is the output current capability of LT3477IUF#PBF?

    • LT3477IUF#PBF has an output current capability of up to 1A.

  3. Can LT3477IUF#PBF be used in automotive applications?

    • Yes, LT3477IUF#PBF is suitable for automotive applications due to its wide input voltage range and robust design.

  4. What is the switching frequency of LT3477IUF#PBF?

    • The switching frequency of LT3477IUF#PBF is adjustable from 200kHz to 2MHz.

  5. Does LT3477IUF#PBF have built-in overcurrent protection?

    • Yes, LT3477IUF#PBF features built-in overcurrent protection to safeguard the circuit and load.

  6. Is LT3477IUF#PBF suitable for battery-powered applications?

    • Yes, LT3477IUF#PBF is suitable for battery-powered applications due to its low quiescent current and high efficiency.

  7. What type of package does LT3477IUF#PBF come in?

    • LT3477IUF#PBF is available in a 16-lead QFN package for compact and efficient PCB layout.

  8. Can LT3477IUF#PBF operate in a wide temperature range?

    • Yes, LT3477IUF#PBF is designed to operate in a wide temperature range, making it suitable for industrial and harsh environments.

  9. Does LT3477IUF#PBF require external compensation components?

    • No, LT3477IUF#PBF features internal compensation, eliminating the need for external compensation components.

  10. Is LT3477IUF#PBF suitable for LED driver applications?

    • Yes, LT3477IUF#PBF is commonly used as an LED driver due to its high efficiency and adjustable switching frequency.