SC1185ACSWTRT

Overview

The SC1185ACSWTRT is a programmable synchronous DC/DC converter featuring an integrated dual low-dropout regulator controller. Designed for advanced microprocessor power applications, it combines a voltage mode synchronous controller with two linear regulators to implement three distinct DC/DC converters. The device supports flexible motherboard configurations and provides stable power delivery for processors such as the Intel Pentium II family.

Feature Summary

• Synchronous design architecture enables efficient operation without requiring external heatsinks
• Integrated five-bit digital-to-analog converter allows precise output voltage programmability
• On-chip power-good function monitors output status for system reliability
• Dual low-dropout linear regulators provide dedicated auxiliary power rails

Applications

• Intel Pentium II and III microprocessor core voltage supplies
• Flexible motherboard power distribution systems
• Programmable triple power supply implementations
• Microprocessor supplies ranging from 1.3V to 3.5V

Procurement Notes

Verify that the ordering suffix TRT corresponds to the tape-and-reel packaging format required for automated surface-mount assembly. Confirm that the ACWS designation matches the specific package variant and temperature rating needed for the target application environment before finalizing procurement orders.

Selection Notes

Select this component when designing power stages for legacy x86 processors requiring synchronized switching and linear regulation. Ensure the input voltage range accommodates the system bus requirements and that the thermal solution aligns with the no-heatsink efficiency claims of the synchronous section.

Part Context

This part belongs to Semtech's specialized power management portfolio targeting high-performance computing platforms. It addresses the complex multi-rail power needs of central processing units by integrating switching and linear technologies into a single compact package, reducing board space and component count.

Replacement Considerations

The SC1185A serves as a direct functional equivalent within the same product family. Verify pin compatibility and electrical specifications against the original datasheet to ensure seamless integration without circuit redesign.