LT8301MPS5#TRPBF

Overview

The LT8301MPS5#TRPBF is a micropower isolated flyback converter from Analog Devices, designed for applications requiring minimal external components. It features an integrated 1.2A, 65V DMOS power switch and operates with an input voltage range of 2.7V to 42V. The device eliminates the need for opto-isolators or transformer third windings by sampling the output voltage directly from the primary-side flyback waveform. Regulation is achieved using a single external resistor, while internal compensation and soft-start further reduce component count. It offers boundary mode operation for heavy loads and low-ripple Burst Mode operation at light loads, maintaining high efficiency.

Feature Summary

• Eliminates opto-isolators and transformer third windings by sampling output voltage directly from the primary-side flyback waveform
• Integrates a 1.2A, 65V DMOS power switch with all high-voltage circuitry and control logic in a compact package
• Provides accurate regulation via a single external resistor without requiring complex feedback networks
• Maintains high efficiency at light loads through low-ripple Burst Mode operation while minimizing output voltage ripple

Applications

• Isolated telecom, automotive, industrial, and medical power supplies
• Isolated auxiliary and housekeeping power supplies
• Battery-powered systems requiring high efficiency at light loads

Procurement Notes

Verify the specific suffix MPS5 against official Analog Devices documentation to confirm pinout compatibility and thermal characteristics. Ensure the ordering part number matches the exact tape-and-reel packaging requirements. Cross-reference the AEC-Q100 qualification status if automotive reliability is required. Confirm that the TSOT-23-5 package dimensions align with your PCB layout constraints before finalizing procurement.

Selection Notes

Select this component when design constraints demand a small footprint and minimal bill of materials for isolated conversion. It is suitable for systems where input voltages vary between 2.7V and 42V. Consider its micropower quiescent current for battery-operated devices. Evaluate the 1.2A switch current limit against peak load requirements. Ensure the application can tolerate the boundary mode operation characteristics during heavy loading conditions.

Part Context

The LT8301 belongs to Analog Devices' family of micropower isolated flyback converters. It shares architectural similarities with other parts in the series but is distinguished by its specific 1.2A switch rating and 65V breakdown voltage. The MPS5 suffix indicates a specific package variant within the TSOT-23-5 form factor. This part serves as a cost-effective solution for low-to-medium power isolated applications compared to traditional opto-isolated designs.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.