SCT2220TVAR

Voltage Regulators - DC DC Switching Regulators Overview

The SCT2220TVAR is a fully integrated synchronous buck DC-DC converter from SCT, designed for high power density applications. It supports an input voltage range of 4.2V to 17V and delivers a continuous output current of up to 2A. The device features a feedback reference voltage of 0.8V with ±2.5% accuracy. Internal MOSFETs exhibit on-resistances of 90mΩ for the high-side and 60mΩ for the low-side. Operating at a fixed switching frequency of 750kHz, it utilizes Constant On-Time (COT) control with Pulse Frequency Modulation (PFM) in light load conditions. Standby static current is specified at 150μA. Key timing parameters include a minimum on-time of 80ns and an internal soft-start time of 2ms. Protection mechanisms include over-voltage protection, over-temperature shutdown at 150°C, and hiccup mode over-current protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates synchronous rectification architecture with low Rds(on) MOSFETs for high efficiency and compact design.
• Employs COT control mode with automatic PFM transition for optimized efficiency under light load conditions.
• Provides comprehensive protection including output over-voltage, thermal shutdown, and hiccup-mode over-current protection.

Voltage Regulators - DC DC Switching Regulators Applications

• Digital TV systems
• Set-top boxes
• XDSL modems
• Server power distribution
• Communication point-of-load (POL) circuits

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'VAR' against official SCT documentation to confirm pinout compatibility and tape-and-reel specifications. Ensure the ordering code matches the required package variant, as SOT23-6L and SOT563-6L may have distinct marking or handling requirements. Cross-reference the datasheet revision date to confirm parameter stability before finalizing procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a 2A output current is required within a 4.2V to 17V input window. The 750kHz frequency allows for smaller passive components compared to lower-frequency alternatives. Verify that the application load profile benefits from PFM mode for improved light-load efficiency. Ensure the PCB layout accommodates the thermal requirements associated with the selected package type.

Voltage Regulators - DC DC Switching Regulators Part Context

The SCT2220 series represents SCT's solution for mid-range current synchronous buck conversion. It targets applications requiring high power density and efficient power management in portable or space-constrained electronics. The device integrates all necessary power switches and control logic into a single small-footprint package, simplifying the design process for engineers developing compact power supplies.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Engineers should consult official SCT documentation for direct cross-references or perform detailed electrical parameter matching if considering alternative manufacturers.