LTC3891HFE#PBF

DC DC Switching Controllers Overview

The LTC3891HFE#PBF is a synchronous step-down DC/DC controller from Analog Devices, designed for high-efficiency power conversion. 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 delivers up to 15A of output current. It maintains a low quiescent current of 50µA and functions reliably within a temperature range of -40°C to +150°C junction temperature.

DC DC Switching Controllers Feature Summary

• Synchronous buck topology drives all N-channel MOSFETs for high efficiency
• Fixed 900kHz switching frequency optimizes component size and transient response
• Low 50µA quiescent current extends battery life in portable applications
• Integrated soft-start and tracking capabilities ensure controlled startup

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 HFE against your design requirements, as it denotes the extended temperature range compared to other variants. Confirm the package type matches your PCB footprint. Check the latest datasheet for any manufacturing changes or pinout updates before finalizing the bill of materials.

DC DC Switching Controllers Selection Notes

Select this model when a fixed 900kHz frequency is required rather than adjustable options. Ensure the thermal design accommodates the 15A capability within the TSSOP-EP-20 package constraints. Verify that the application does not require the buck-boost topology found in LT series counterparts.

DC DC Switching Controllers Part Context

This component belongs to the LTC3891 family of synchronous step-down controllers. It shares architectural similarities with the LTC3890 and LTC3892 but differs in channel count and specific feature sets like fixed versus adjustable frequency.

DC DC Switching Controllers Replacement Considerations

LTC3891EFE#PBF offers similar functionality with a different operating temperature range. LTC3891IFE#PBF provides an adjustable frequency range instead of the fixed 900kHz option.