LX1555CM

DC DC Switching Controllers Overview

The LX1555CM is a positive output buck-boost DC-DC switching controller IC manufactured by Microsemi Corporation. It operates within a supply voltage range of 7.6V to 30V and features synchronous rectification for improved efficiency. The device utilizes current mode control with frequency control characteristics and supports a maximum duty cycle of 48%. Designed for surface mount applications, it is housed in an 8-PDIP package and functions reliably across a temperature range of -40°C to 85°C.

DC DC Switching Controllers Feature Summary

• Synchronous rectification capability for enhanced energy efficiency
• Current mode control architecture with frequency control
• Buck-boost topology supporting positive output configurations

DC DC Switching Controllers Applications

• Offline converter applications requiring low start-up current
• Power management systems utilizing buck-boost topologies
• General purpose DC-DC conversion circuits

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'CM' corresponds to the 8-PDIP package variant when sourcing. Confirm that the component status aligns with project lifecycle requirements, as availability may vary. Ensure compatibility with existing board layouts designed for through-hole mounting. Cross-reference datasheet revisions to confirm pinout consistency with previous iterations of the LX1555 family.

DC DC Switching Controllers Selection Notes

Select this component when a synchronous buck-boost controller is required for offline applications. The 8-PDIP package suits prototyping or environments where through-hole assembly is preferred over surface mount. Consider the 250µA maximum start-up current specification for battery-powered or energy-sensitive designs. Verify that the 7.6V minimum operating voltage meets the system's input rail requirements.

DC DC Switching Controllers Part Context

The LX1555CM belongs to the LX155X family of ultra-low start-up current current mode control ICs. This series is engineered to provide high energy efficiency for offline converter applications. The family includes variants such as LX1552, LX1553, LX1554, and LX1555, differentiated primarily by packaging and temperature ratings while sharing core control functionalities.

DC DC Switching Controllers Replacement Considerations

Direct substitutes include other members of the LX155X family, such as LX1555IDM (SOIC package) or LX1555CDM. Verify package compatibility before substitution, as the CM variant uses an 8-PDIP form factor distinct from the SOIC options.