LTC3855IFE#PBF

DC DC Switching Controllers Overview

The LTC3855IFE#PBF is a dual multiphase synchronous step-down switching regulator controller manufactured by Analog Devices Inc. It operates within an input voltage range of 4.5 V to 38 V and supports output voltages from 600 mV to 12.5 V. The device provides two independent outputs with a maximum output current capability of 30 A per channel. It features a programmable switching frequency between 250 kHz and 770 kHz and utilizes current-mode control with phase-shift technology. Designed for high-efficiency power delivery, it includes differential remote sensing and DCR temperature compensation. The component is housed in a 38-lead TSSOP-EP package and functions reliably across an operating temperature range of -40°C to +125°C.

DC DC Switching Controllers Feature Summary

• Dual-channel architecture supporting multiphase operation up to twelve phases
• Integrated high-speed differential remote sense amplifier for precise load regulation
• Programmable DCR temperature compensation for accurate current limiting
• Supports Burst Mode operation for improved light-load efficiency

DC DC Switching Controllers Applications

• Computer systems requiring high-current power distribution
• Telecommunications infrastructure equipment
• Industrial and medical instrumentation
• DC power distribution networks

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS adherence before procurement. Confirm the TSSOP-EP-38 package variant matches the target PCB footprint. Ensure the design accommodates the specified thermal requirements for the exposed pad configuration. Cross-reference the manufacturer's latest datasheet for any recent pinout or electrical specification updates.

DC DC Switching Controllers Selection Notes

Select this controller when designing high-current buck converters requiring precise load regulation via remote sensing. It is suitable for applications needing wide input voltage ranges and flexible phase configurations. Consider the thermal performance of the TSSOP-EP package for the expected power dissipation levels. Evaluate the need for DCR sensing versus discrete resistors based on cost and accuracy requirements.

DC DC Switching Controllers Part Context

This component belongs to the PolyPhase series of power management ICs from Analog Devices. It is part of a family of synchronous DC/DC controllers designed for demanding power delivery applications. The device complements other Linear Technology products by offering integrated drivers and advanced control features for multi-phase topologies.

DC DC Switching Controllers Replacement Considerations

Direct replacements include the LTC3855IUJ#PBF and LTC3855EUJ#PBF, which share identical electrical specifications but utilize different packages (QFN). Verify that the alternative package fits the existing board layout or allows for redesign.