FSA515UCX

Analog Switches, Multiplexers, Demultiplexers Overview

The FSA515UCX is a single-pole single-throw (SPST) depletion mode power switch manufactured by onsemi. It features a low-side configuration housed in a compact WLCSP-4 package with surface-mount installation. The device operates within a supply voltage range of 0 V to 5.5 V and supports a maximum working current of 350 mA. Key electrical characteristics include an on-resistance (RdsOn) of 1.1 Ω. The component functions reliably across an extended industrial temperature range from -40°C to +85°C, making it suitable for portable applications requiring efficient power management in minimal space.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Depletion mode operation enables normally-on behavior for specific power sequencing requirements
• Low-side switching topology simplifies control interface design
• Ultra-small WLCSP footprint minimizes board space consumption

Analog Switches, Multiplexers, Demultiplexers Applications

• Portable electronic devices requiring battery-powered load switching
• Power management circuits in mobile communication equipment
• Embedded systems needing compact power distribution solutions

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the active status of this component through official onsemi channels before finalizing designs. Confirm that the WLCSP-4 package availability aligns with manufacturing capabilities. Ensure compliance with RoHS directives as specified in the product documentation. Check for any recent process change notifications or end-of-life announcements that may impact long-term supply stability.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this part when a compact, low-side power switch with depletion mode characteristics is required. The 1.1 Ω on-resistance and 350 mA current rating suit moderate load applications. Consider the WLCSP-4 package constraints for PCB layout. Validate that the 0 V to 5.5 V operating range matches the system power rails and signal levels.

Analog Switches, Multiplexers, Demultiplexers Part Context

This component belongs to onsemi's portfolio of analog switches and power management integrated circuits. It is designed for applications where space efficiency and reliable power switching are critical. The depletion mode technology distinguishes it from standard enhancement-mode MOSFETs, offering unique control behaviors for specific circuit topologies.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Consult onsemi technical support for verified alternative part numbers. Ensure any substitute maintains compatibility with the WLCSP-4 package dimensions and pinout configuration. Verify that replacement components meet the same electrical specifications and temperature ratings.