SC2442HITSTR

Overview

The SC2442HITSTR is a dual synchronous buck controller from Semtech, designed for high-efficiency power management. It features two independent output channels with a wide input voltage range of 4.75 V to 36 V. The device supports programmable switching frequencies up to 1.1 MHz and operates out-of-phase to minimize input ripple. It includes integrated soft-start, over-current protection, and power-up sequencing. The component is housed in a 24-TSSOP package and is rated for an industrial temperature range of -40°C to +125°C.

Feature Summary

• Dual synchronous buck converter controllers configured for high efficiency at high currents
• Out-of-phase operation capability to reduce input current ripple and allow fewer input capacitors
• Integrated power-up sequencing and asynchronous startup mode to prevent latch-ups
• Programmable clock frequency up to 1.1 MHz with external synchronization support

Applications

• Point-of-load converter applications
• DSL equipment requiring multiple output voltages
• Power management for mixed-signal applications
• Cable modems and set-top boxes

Procurement Notes

Verify the specific suffix 'H' against the manufacturer's latest documentation to confirm the exact input voltage rating (up to 36V) and pinout compatibility. Check for obsolescence status or active lifecycle notices before finalizing procurement plans. Ensure that the required thermal performance aligns with the TSSOP-24 package limitations for the intended application environment.

Selection Notes

Select this component when designing systems requiring two isolated or sequenced low-voltage outputs from a higher voltage rail. The wide input range accommodates various supply sources, while the high-frequency operation allows for smaller passive components. Consider the thermal dissipation requirements of the TSSOP-24 package under maximum load conditions.

Part Context

The SC2442 series belongs to Semtech's portfolio of high-performance switching regulators. This specific model focuses on dual-channel buck control, distinguishing itself from single-channel or boost-only variants. It is part of a family designed for compact, efficient power solutions in consumer and industrial electronics where space and efficiency are critical constraints.

Replacement Considerations

Public confirmed substitute: TPS43351QDAPRQ1 (Texas Instruments). Verify electrical parameter compatibility and pin-to-pin alignment before substitution.