SC1485ITSTRT

Overview

The SC1485ITSTRT is a synchronous step-down switching regulator controller from Semtech, designed for multi-output power supply applications. It operates within an input voltage range of 4.5 V to 30 V and supports adjustable output voltages. The device features four independent outputs with a maximum output current capability of 25 A per channel. Operating at a fixed switching frequency of 700 kHz, it ensures efficient power conversion. The component functions reliably across an extended temperature range from -35°C to +105°C. Packaged in a TSSOP-28 surface-mount format, it integrates shutdown functionality and requires a quiescent supply current of 9 mA.

Feature Summary

• Integrates four independent synchronous buck channels for multi-rail power distribution
• Supports wide input voltage range suitable for industrial and server bus architectures
• Includes integrated shutdown control for power management flexibility
• Optimized for high-current applications with dedicated thermal performance characteristics

Applications

• Server and data center power distribution modules
• Industrial equipment multi-voltage power supplies
• Telecommunications infrastructure power systems
• High-density point-of-load regulation stages

Procurement Notes

Verify the specific suffix ITSTRT against official Semtech documentation to confirm lead-free, RoHS, and WEEE compliance status. Ensure the ordering code matches the required tape and reel packaging specifications. Confirm that the intended application environment falls within the specified operating temperature range. Cross-reference the latest datasheet for any updates regarding pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this controller when designing power systems requiring multiple regulated rails from a single wide-input source. The four-channel architecture simplifies board layout compared to discrete solutions. Consider the 700 kHz switching frequency for balancing efficiency and passive component size. Verify that the load requirements do not exceed the 25 A per channel limit. Evaluate thermal management needs given the high current capabilities and TSSOP-28 package constraints.

Part Context

This component belongs to the SC24 series of flexible controllers from Semtech, targeting high-performance power management. It complements other PMIC offerings by providing scalable multi-phase or multi-output solutions. The TSSOP-28 package allows for compact integration in space-constrained designs. It serves as a core control element in complex power delivery networks where reliability and efficiency are critical.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult Semtech directly for qualified alternatives or newer generation replacements. Verify compatibility if considering cross-brand solutions due to proprietary control algorithms.