LT3782AIUFD#TRPBF

Overview

The LT3782AIUFD#TRPBF is a current mode 2-phase step-up DC/DC converter controller manufactured by Analog Devices Inc. It operates within an input voltage range of 6 V to 40 V and supports a programmable switching frequency from 150 kHz to 500 kHz. The device features a 10 V gate drive with a 4 A peak drive current, suitable for driving industrial grade high power MOSFETs. It utilizes a thermally enhanced 4 mm × 5mm QFN package. Key electrical parameters include a static current of 40 uA and an operating supply current of 11 mA. The component functions as a synchronous step-up controller with adjustable output.

Feature Summary

• Two-phase operation reduces required input and output filtering capacitance and inductance requirements
• Provides synchronous gate signals with programmable falling edge delay to prevent cross conduction
• Includes internal slope compensation and duty cycle clamp capabilities
• Features tighter current sense mismatch tolerance compared to the standard LT3782

Applications

• Industrial power systems requiring high efficiency step-up conversion
• Applications utilizing external MOSFET drivers for synchronous rectification
• Systems needing reduced passive component size through multi-phase architecture

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing. Confirm the 'A' variant designation ensures the tighter current sense mismatch tolerance required for precise load sharing. Check manufacturer documentation for RoHS compliance status and lead time constraints due to potential limited availability or factory special order requirements.

Selection Notes

Select this controller when system design demands reduced magnetic component volume through two-phase interleaving. Ensure the application requires a 6 V to 40 V input range and benefits from the 4 A peak gate drive capability. Consider this part over the standard LT3782 if strict current sense matching is critical for balanced phase currents in high-power boost topologies.

Part Context

This component belongs to the LT3782A series of power management ICs. It is functionally identical to the LT3782 but distinguished by improved current sense mismatch tolerance. The device is part of Analog Devices' portfolio of switching voltage regulators designed for robust industrial and commercial applications requiring efficient DC/DC conversion.

Replacement Considerations

The LT3782AIUFD#PBF serves as a tube-packaged alternative to the tape-and-reel LT3782AIUFD#TRPBF. Designers must verify that the pinout and thermal characteristics remain compatible when switching between package formats.