LX1555IDM

DC DC Switching Controllers Overview

The LX1555IDM is a DC-DC switching controller from the LX155X family, designed for offline converter applications. It implements current mode control with an ultra-low start-up current of 250µA maximum. The device supports Buck and Boost topologies with a single positive output configuration. It operates within a supply voltage range of 7.6V to 30V and features synchronous rectification. The component is housed in an 8-SOIC package and functions at temperatures between -40°C and 85°C.

DC DC Switching Controllers Feature Summary

• Ultra-low start-up current capability for enhanced energy efficiency
• Current mode control architecture for stable regulation
• Integrated synchronous rectification driver
• Supports both step-up and step-down conversion topologies

DC DC Switching Controllers Applications

• Offline power converter designs
• Buck-Boost voltage regulation circuits
• Energy-efficient power management systems

DC DC Switching Controllers Procurement Notes

Verify the obsolete status of this Microsemi part number before procurement planning. Confirm that the 8-SOIC package dimensions match your PCB footprint requirements. Ensure compatibility with the specified 7.6V to 30V supply range for your target application environment.

DC DC Switching Controllers Selection Notes

Select this component when designing offline converters requiring low quiescent current. The synchronous rectification feature improves efficiency compared to non-synchronous alternatives. Consider the 8-SOIC package constraints and the specific current mode control characteristics for loop stability.

DC DC Switching Controllers Part Context

This IC belongs to the LX155X family of current mode controllers. The family includes variants such as LX1552, LX1553, and LX1554, which share similar architectural features but may differ in specific pinouts or internal configurations. The LX1555IDM specifically denotes the industrial temperature grade version in the SOIC package.

DC DC Switching Controllers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status, direct replacements should be identified through official Microsemi (Microchip) cross-reference tools or by evaluating equivalent current-mode buck-boost controllers with compatible input voltage ranges.