CDBF43

Overview

The Comchip Technology CDBF43 is a single-phase Schottky barrier rectifier designed for low-voltage, high-efficiency applications. It features an average rectified forward current of 200mA and a maximum repetitive reverse voltage of 30V. The device exhibits a typical forward voltage drop of 650mV at rated current and maintains a low reverse leakage current of 500nA. With a forward surge current capability of 500mA, it provides robust transient protection. Constructed with silicon epitaxial planar chips, the component ensures ultra-high-speed switching and low power loss, making it suitable for compact power supply designs.

Feature Summary

• Ultra-low forward voltage drop for enhanced energy efficiency
• High-speed switching characteristics for improved circuit response
• Low reverse leakage current to minimize standby power consumption
• Guarding against overvoltage transients via high surge capability

Applications

• Ultra-low-power point-of-load converters
• Bias supplies operating under 200mA
• DC-DC converter freewheeling paths (with caution)
• Reverse polarity protection circuits

Procurement Notes

Verify the specific ordering suffix to confirm package type and environmental compliance status. Ensure the selected variant matches the required thermal management needs for the target application. Cross-reference the manufacturer's latest datasheet to confirm pinout compatibility and absolute maximum ratings before integration into the design.

Selection Notes

Select this component for circuits requiring minimal forward voltage drop at low current levels. It is optimized for bias supplies and PoL converters rather than high-current freewheeling duties. Evaluate the thermal performance in confined spaces due to the small signal package constraints. Confirm that the 30V reverse voltage rating exceeds the peak inverse voltage in the operational environment.

Part Context

This part belongs to Comchip Technology's series of small-signal Schottky rectifiers. These components are engineered for industrial and consumer electronics where space and efficiency are critical. The series utilizes silicon epitaxial planar technology to deliver consistent performance across varying temperature conditions while maintaining strict manufacturing standards.

Replacement Considerations

Direct substitutes must match the 200mA current, 30V reverse voltage, and SOD-723F or equivalent package. Verify forward voltage and leakage current specifications to ensure circuit compatibility. Generic replacements may differ in surge capability or switching speed.