LT3477IFE#PBF

LED Driver IC Overview

The LT3477IFE#PBF is a micropower boost converter with an integrated Schottky diode, manufactured by Analog Devices Inc. It operates within an input voltage range of 2.5 V to 25 V and delivers up to 3 A of output current. The device features a switch rated for 42 V and supports switching frequencies from 200 kHz to 3.5 MHz. It utilizes dual rail-to-rail current sense amplifiers for precise control. The component is housed in a 20-lead QFN package and functions as a DC/DC converter with topologies including Boost, Flyback, Inverting, and SEPIC.

LED Driver IC Feature Summary

• Integrates dual rail-to-rail current sense amplifiers for accurate current monitoring
• Combines traditional voltage feedback with unique current feedback loops for constant-current and constant-voltage operation
• Includes an internal 3A, 42V switch and integrated Schottky diode

LED Driver IC Applications

• LED drivers with open LED protection
• Micropower boost converter circuits
• General DC/DC conversion systems requiring high efficiency

LED Driver IC Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging compliant with RoHS standards. Confirm the IFE variant corresponds to the correct temperature grade and package type (QFN-20) required for your design. Check official Analog Devices documentation for the latest lifecycle status and availability constraints, as distribution channels may report limited stock or restricted supply conditions.

LED Driver IC Selection Notes

Select this component when designing circuits that require a micropower boost topology with integrated rectification. Ensure the application demands an input voltage range compatible with 2.5 V to 25 V sources. Consider the 42V switch rating for applications involving higher output voltages or inductive kickback scenarios. Verify that the QFN-20 package footprint fits the PCB layout constraints.

LED Driver IC Part Context

This part belongs to the LT3477 series of switching regulators from Analog Devices. It is categorized under PMIC - Power Management ICs and specifically designed as a micropower boost converter. The series is known for integrating high-side switches and control circuitry to minimize external component count while maintaining high performance in space-constrained designs.

LED Driver IC Replacement Considerations

Consult Analog Devices datasheets for direct pin-compatible substitutes within the LT3477 family, such as the LT3477EUF#PBF, noting differences in operating temperature ranges. Verify functional equivalence for specific topology requirements like Boost, Flyback, or SEPIC before substitution.