LTC3891EUDC#TRPBF

DC DC Switching Controllers Overview

The LTC3891EUDC#TRPBF is a low quiescent current synchronous step-down DC/DC controller from Analog Devices. It operates with an input voltage range of 4V to 60V and supports output voltages from 800mV to 24V. The device features a fixed switching frequency of 900kHz and can drive external N-channel MOSFETs for output currents up to 15A. It includes a shutdown function, power good indicator, and operates within a temperature range of -40°C to +125°C. The package is a 20-lead QFN (3mm x 4mm) with an exposed pad.

DC DC Switching Controllers Feature Summary

• Synchronous buck controller architecture driving external N-channel power stages
• Low no-load quiescent current for extended battery life in portable applications
• Integrated soft-start and tracking capabilities for controlled startup sequences
• Current foldback protection limits heat dissipation during short-circuit conditions

DC DC Switching Controllers Applications

• Automotive always-on systems
• Battery-operated digital devices
• Distributed DC power systems

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'EUDC' against the manufacturer's official datasheet to confirm the exact package type and temperature grade. Ensure the order matches the required tape and reel packaging format. Cross-reference the part number with the latest Analog Devices documentation to avoid discrepancies between distributor listings and official specifications.

DC DC Switching Controllers Selection Notes

Select this component when a high input voltage range up to 60V is required alongside low standby power consumption. The fixed 900kHz frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the 15A current capability and thermal performance of the QFN package for the intended load requirements.

DC DC Switching Controllers Part Context

This part belongs to the LTC3891 family of synchronous step-down controllers designed for efficiency and low noise. It is distinct from integrated switch regulators as it requires external MOSFETs. The EUDC suffix indicates a specific commercial temperature grade and QFN package configuration within the product line.

DC DC Switching Controllers Replacement Considerations

LTC3891IFE#PBF

DC DC Switching Controllers FAQ

What is the maximum input voltage for the LTC3891EUDC#TRPBF?

The maximum input voltage is 60V.

Does the LTC3891 include internal power switches?

No, it is a controller that drives external N-channel synchronous power MOSFETs.