Onsemi FDS8858CZ Dual N-Channel PowerTrench MOSFET: Features, Applications, and Technical Specifications

The Onsemi FDS8858CZ is a highly integrated dual N-channel MOSFET that leverages advanced PowerTrench® technology to deliver superior performance in power management applications. This device combines two independent MOSFETs in a compact SOIC-8 package, making it an ideal solution for space-constrained designs requiring high efficiency and reliability. Its low on-resistance and fast switching characteristics ensure minimal power loss, which is critical for modern electronic systems.

Key Features

The FDS8858CZ boasts several standout features, including an ultra-low RDS(ON) of 13 mΩ at VGS = 4.5 V, which significantly reduces conduction losses. It operates with a gate charge (Qg) as low as 11 nC, enabling efficient high-frequency switching. The device supports a drain current (ID) of up to 6.3 A per channel and offers enhanced thermal performance due to its optimized package design. Additionally, it is designed with a low threshold voltage (VGS(th)), making it compatible with low-voltage drive circuits.

Primary Applications

This MOSFET is widely used in DC-DC conversion circuits in computing and telecom infrastructure, where efficiency and power density are paramount. It is also employed in load switching systems, motor control modules, and battery management systems (BMS) for portable devices. Its dual-channel configuration allows for synchronous rectification in buck or boost converters, reducing the need for external components and simplifying board layout.

Technical Specifications

- Drain-Source Voltage (VDS): 20 V

- Continuous Drain Current (ID): 6.3 A per channel

- RDS(ON) (max): 13 mΩ at VGS = 4.5 V

- Gate Threshold Voltage (VGS(th)): 0.6 V to 1.2 V

- Total Gate Charge (Qg): 11 nC

- Package: SOIC-8

ICGOODFIND: The Onsemi FDS8858CZ exemplifies innovation in power semiconductor design, offering engineers a balanced combination of low resistance, high current handling, and compact form factor. Its versatility makes it a go-to component for enhancing efficiency in diverse power applications.

Keywords: PowerTrench MOSFET, Low RDS(ON), DC-DC Conversion, Synchronous Rectification, SOIC-8 Package.