SC2442H

Overview

The SC2442H is a high-performance dual synchronous buck converter controller designed for applications where efficiency and power density are critical. It features two independent synchronous buck converters that can be configured for various topologies. The device supports a wide input voltage range of 4.75V to 36V, accommodating diverse power supply requirements. Both converters are synchronized to prevent beat frequencies and operate out of phase to reduce input ripple, allowing for fewer input capacitors. The programmable clock frequency extends up to 1.1MHz, enabling optimization of inductor and capacitor sizes. Integrated over-current protection and output down to 0.75V ensure robust operation.

Feature Summary

• Dual synchronous buck controllers with integrated synchronization to minimize input ripple
• Wide input voltage range supporting 4.75V to 36V for flexible power architectures
• Programmable switching frequency up to 1.1MHz for efficient component sizing
• Out-of-phase operation capability to enhance thermal performance and reduce passive component count

Applications

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

Procurement Notes

Verify the specific suffix (e.g., H) against the manufacturer's official datasheet to confirm the maximum input voltage rating of 36V versus the standard 30V variant. Ensure the TSSOP-24 package configuration matches the PCB footprint requirements. Confirm RoHS and WEEE compliance status if environmental regulations apply to the end product. Cross-reference the pinout diagram with the latest revision to avoid assembly errors due to potential layout updates.

Selection Notes

Select the SC2442H when a wide input voltage range up to 36V is required for dual-channel synchronous buck conversion. This controller is suitable for designs needing synchronized, out-of-phase operation to minimize input capacitance and ripple current. Consider this part for point-of-load applications where high efficiency at high currents is prioritized. Evaluate the 1.1MHz maximum frequency capability against inductor size constraints and electromagnetic interference requirements.

Part Context

The SC2442H belongs to Semtech's family of high-performance dual buck converter controllers. It complements variants like the SC2442, which typically supports a lower maximum input voltage. These devices are engineered for mixed-signal power management, offering integrated features such as power-up sequencing and asynchronous startup modes. The series targets compact designs by minimizing external component counts through advanced control algorithms and high-frequency operation capabilities.

Replacement Considerations

The SC2442 is a related variant within the same family but typically specifies a maximum input voltage of 30V rather than 36V. Verify input voltage requirements before substitution. Other dual buck controllers from different manufacturers may require significant redesign of the feedback network and compensation components due to differences in control loop characteristics and pin configurations.