LT3782IFE#PBF

Overview

The LT3782IFE#PBF is a current-mode two-phase step-up DC/DC controller manufactured by Analog Devices Inc. It operates within a switching frequency range of 154kHz to 465kHz and supports a maximum duty cycle of 94%. The device features synchronous rectification, clock synchronization, and an input supply voltage range of 6V to 40V. It provides two positive output stages with transistor drivers and includes control characteristics such as enable, reset, and soft start. The component is housed in a 28-TSSOP-EP package with exposed pad for surface mount installation and functions across a junction temperature range of -40°C to 125°C.

Feature Summary

• Implements current-mode control architecture for two-phase boost conversion
• Integrates synchronous rectification to enhance efficiency
• Supports external clock synchronization for system timing alignment
• Includes built-in enable, reset, and soft-start control logic

Applications

• High-power LED lighting systems requiring multi-phase boost regulation
• Industrial power supplies utilizing step-up DC/DC conversion
• Battery-powered equipment needing efficient voltage elevation

Procurement Notes

Verify the specific suffix designation against the manufacturer's official documentation to confirm exact electrical tolerances and thermal specifications. Confirm RoHS compliance status and material declaration details prior to integration. Ensure that the 28-TSSOP-EP footprint matches the design layout requirements. Check for any recent product change notices regarding epoxy or packaging modifications. Validate that the component meets all environmental operating limits for the intended application environment.

Selection Notes

Select this controller when high-frequency operation reduces passive component size is required. The two-phase topology allows for interleaved switching which minimizes input and output ripple currents. Consider the 4A peak drive capability for driving external power stages efficiently. Evaluate the wide input voltage range suitability for varying source conditions. Ensure the thermal performance of the exposed pad package aligns with the system's heat dissipation strategy.

Part Context

This component belongs to the LT3782 family of power management integrated circuits designed for robust step-up applications. It serves as a core control element in complex DC/DC converter designs where phase interleaving improves transient response and reduces filter requirements. The device represents a specialized solution within Analog Devices' portfolio for high-efficiency power conversion tasks.

Replacement Considerations

Official documentation indicates the LT3782 is not recommended for new designs. Contact Linear Technology (Analog Devices) for potential replacement part numbers. Verify compatibility with existing board layouts if substituting with newer generation controllers.