LTC3855IUJ#TRPBF

DC DC Switching Controllers Overview

The LTC3855IUJ#TRPBF is a dual PolyPhase synchronous step-down switching regulator controller manufactured by Analog Devices. It drives all N-channel power MOSFET stages and includes a high-speed differential remote sense amplifier. The device supports an input voltage range of 4.5V to 38V and offers two output channels with positive configuration. It operates at a switch frequency between 250kHz and 770kHz, featuring a maximum duty cycle of 95%. The component utilizes a 40-QFN (6x6mm) surface-mount package with a height of 0.75mm. It functions within a temperature range of -40°C to +125°C and is RoHS compliant.

DC DC Switching Controllers Feature Summary

• Dual channel PolyPhase current mode control for multiphase synchronous step-down applications
• Integrated high-speed differential remote sense amplifier for precise load regulation
• Programmable current sense voltage supporting inductor DCR or discrete resistor sensing
• Precision 0.6V reference enabling output voltages up to 12.5V

DC DC Switching Controllers Applications

• Intermediate bus voltage conversion
• Battery-powered system power management
• Multiphase point-of-load regulation
• High-density DC/DC converter designs

DC DC Switching Controllers Procurement Notes

Verify the specific suffix TRPBF indicates tape and reel packaging when sourcing. Confirm the QFN package variant matches the required footprint. Check for recent production change notices regarding bond wire materials. Ensure the industrial temperature rating aligns with the target operating environment. Validate RoHS compliance status through official manufacturer documentation prior to procurement.

DC DC Switching Controllers Selection Notes

Select this controller for applications requiring dual-phase synchronization and remote sensing accuracy. Consider the wide input voltage range suitable for various battery chemistries. Evaluate the programmable current sense options for optimal efficiency with chosen inductors. Assess thermal performance requirements given the compact QFN package dimensions. Compare against single-phase alternatives if lower current capacity suffices.

DC DC Switching Controllers Part Context

This component belongs to the LTC3855 family of dual multiphase synchronous DC/DC controllers. It shares core architecture with variants like the LTC3855EUJ#PBF but differs in packaging and temperature specifications. The PolyPhase technology allows interleaving phases to reduce input and output ripple currents. It complements other Linear Technology power management solutions for complex multi-rail systems.

DC DC Switching Controllers Replacement Considerations

The LTC3855EUJ#PBF serves as a tube-packaged alternative within the same functional family. Verify pinout compatibility and thermal characteristics when substituting packages. Cross-reference datasheet parameters to ensure equivalent electrical performance. Confirm that the replacement part meets the specific temperature grade requirements of the application.