LT8357HMSE#PBF

Overview

The LT8357HMSE#PBF is a wide input range, current mode DC/DC controller from Analog Devices Inc. It supports boost, SEPIC, and flyback converter topologies with a maximum input voltage of 60V and a switching frequency of 2MHz. The device features low quiescent current for efficient power management. It is housed in a thermally enhanced 12-lead MSOP package (MSOP-EP) to facilitate heat dissipation. The component includes internal bias supply regulation and soft-start functionality to ensure stable operation during startup transients.

Feature Summary

• Supports multiple converter topologies including boost, SEPIC, and flyback configurations
• Features low quiescent current operation for improved efficiency
• Includes integrated soft-start capability to limit inrush current
• Utilizes a thermally enhanced surface-mount package for reliable thermal performance

Applications

• Industrial control systems requiring isolated or non-isolated power conversion
• Battery-powered equipment needing high-efficiency step-up regulation
• Automotive electronics operating within wide input voltage ranges
• Telecommunications infrastructure power supplies

Procurement Notes

Verify the complete part number including the suffix #PBF to confirm lead-free compliance and RoHS status. Ensure the specific package variant matches the PCB footprint requirements. Confirm that the supplier provides valid traceability documentation for industrial applications. Check for any recent design revisions that may affect pin compatibility or thermal characteristics before finalizing procurement orders.

Selection Notes

Select this controller when designing circuits requiring flexible topology options such as SEPIC or flyback. Consider the 60V input limit and 2MHz switching frequency against system noise and component stress requirements. Evaluate the need for external components like transformers and inductors based on the chosen topology. Compare quiescent current specifications against other controllers if ultra-low standby power is critical for the application.

Part Context

This component belongs to the LT8357 family of DC/DC controllers designed for high-efficiency power conversion. It shares functional similarities with other Analog Devices controllers but is distinct in its support for both SEPIC and flyback modes alongside boost. The HMSE#PBF designation indicates a specific package type and environmental compliance standard within the broader product line.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Users should consult official Analog Devices resources for cross-reference data or contact technical support for compatible alternatives.