LTC3895HFE

DC DC Switching Controllers Overview

The LTC3895HFE is a high-performance synchronous step-down DC/DC controller designed for industrial applications requiring wide input voltage ranges. It drives an all N-channel synchronous power MOSFET stage, supporting input voltages from 7V to 140V. The device features a constant frequency current mode architecture with a phase-lockable switching frequency up to 850kHz. It provides regulated output voltages ranging from 800mV to 60V and supports output currents up to 10A. The controller includes integrated soft-start, tracking, and power-good indicators, operating within a junction temperature range of -40°C to 150°C.

DC DC Switching Controllers Feature Summary

• Supports full N-channel synchronous MOSFET stages for high efficiency across wide input voltage ranges.
• Features a constant frequency current mode architecture allowing phase-lockable frequencies up to 850kHz.
• Includes advanced control characteristics such as soft-start, tracking, and power-good status indication.

DC DC Switching Controllers Applications

• Industrial automation systems requiring robust power regulation
• Telecommunications infrastructure equipment
• High-voltage battery-powered devices

DC DC Switching Controllers Procurement Notes

Verify the specific suffix (HFE) against the manufacturer's official datasheet to confirm package type and temperature grade. Ensure compatibility with external MOSFET selection for the intended current load. Confirm that the design utilizes appropriate heat dissipation methods given the high input voltage capabilities and potential thermal loads in synchronous buck configurations.

DC DC Switching Controllers Selection Notes

Select this component when designing systems with input voltages exceeding standard 60V limits, specifically up to 140V. It is suitable for applications demanding high efficiency through N-channel MOSFETs and precise current mode control. Consider the 850kHz maximum frequency for balancing component size and efficiency requirements in space-constrained designs.

DC DC Switching Controllers Part Context

The LTC3895 belongs to Analog Devices' family of high-voltage synchronous buck controllers. It is distinct from lower-voltage counterparts like the LTC3890 or single-phase variants by its ability to handle up to 140V inputs while maintaining high efficiency. The HFE suffix typically denotes a specific thermal and packaging configuration within the TSSOP-EP series.

DC DC Switching Controllers Replacement Considerations

Direct replacements include other members of the LTC3895 family such as the LTC3895EFE or LTC3895IFE, provided the pinout and electrical specifications match the specific application requirements. Verify that any substitute maintains the 140V input rating and synchronous drive capability.