LT3782AIFE

Overview

The LT3782AIFE is a current mode, two-phase step-up DC/DC converter controller manufactured by Analog Devices Inc. It operates with an input voltage range of 6 V to 40 V and supports adjustable output voltages up to 72 V. The device features a switching frequency between 150 kHz and 500 kHz, delivering a maximum output current of 4 A per phase. Key electrical parameters include a quiescent current of 40 uA and a working supply current of 11 mA. It utilizes a TSSOP-EP-28 package for surface mount installation and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Two-phase operation reduces system component count and improves transient response
• High switching frequency capability up to 500 kHz for compact design
• Current mode control architecture for precise regulation
• Adjustable output voltage configuration for flexible power delivery

Applications

• Industrial power supply systems requiring high efficiency
• Telecommunications infrastructure equipment
• Automotive electronics applications
• Portable battery-powered devices needing step-up conversion

Procurement Notes

Verify availability status as the part may be subject to limited supply or factory special order conditions. Confirm RoHS compliance details through official documentation before integration. Ensure the TSSOP-EP-28 package footprint matches the PCB layout requirements. Check for alternative tape-and-reel options if continuous production volume is required.

Selection Notes

Select this controller for applications requiring dual-phase boost conversion with high efficiency. Consider the 6 V to 40 V input range compatibility with existing bus architectures. Evaluate thermal performance given the 125°C maximum operating temperature limit. Compare against single-phase alternatives if space constraints allow for larger passive components.

Part Context

The LT3782A belongs to the LT3782 series of power management ICs designed for synchronous step-up conversion. It serves as a controller rather than a complete integrated switch solution, requiring external MOSFETs. This family targets high-power density applications where phase interleaving provides significant ripple cancellation benefits.

Replacement Considerations

LT3782IFE#PBF is a documented substitute variant within the same product family. Verify pinout compatibility and electrical parameter equivalence before substitution. Review datasheet revisions to ensure functional parity in control loop characteristics.