SI83404AAA-IF

Overview

The Si83404AAA-IFR is a four-channel isolated smart switch from Skyworks Solutions, designed for power distribution applications. It integrates high-side and low-side switches within a single DFN-32 package. The device supports an operating supply voltage range of 2.25 V to 32 V and delivers a continuous output current of 700 mA per channel. Key electrical specifications include a maximum on-resistance of 280 mOhms and a current limit of 880 mA. Switching performance features a maximum turn-on time of 2.3 µs and a maximum turn-off time of 2.9 µs. The component operates reliably across a temperature range of -40°C to +125°C.

Feature Summary

• Integrates four independent isolated channels with combined high-side and low-side switching capabilities
• Provides integrated overcurrent protection with defined current limiting thresholds
• Features fast switching speeds with microsecond-level rise and fall times
• Supports wide input voltage ranges suitable for various industrial power distribution needs

Applications

• Industrial power distribution systems requiring isolated switching
• Automotive electronic control units needing robust power management
• Telecommunications infrastructure equipment power routing
• Medical device power supply isolation and distribution

Procurement Notes

Verify the specific suffix designation when ordering, as variations such as IFR indicate reel packaging while other suffixes may denote different tape-and-reel quantities or handling requirements. Confirm that the procurement source provides official datasheets matching the exact part number to ensure compatibility with design specifications. Check manufacturer documentation for moisture sensitivity levels and recommended soldering profiles to maintain component integrity during assembly processes.

Selection Notes

Select this component when designing circuits requiring multiple isolated power paths with integrated protection features. Ensure the application voltage does not exceed the 32 V maximum rating and that thermal management strategies account for the power dissipation at full load. Consider the DFN-32 package dimensions for PCB layout constraints and verify that the switching speed meets the timing requirements of the controlled loads.

Part Context

This device belongs to the Si834xx series of isolated smart switches from Skyworks Solutions. The series is engineered to simplify power distribution designs by combining multiple switches and protection logic into a compact form factor. These components are commonly used in environments where galvanic isolation between control and power domains is critical for safety and noise immunity.

Replacement Considerations

Consult official Skyworks documentation for verified cross-reference part numbers before substitution. Ensure any replacement maintains identical pinout configurations, voltage ratings, and isolation characteristics to prevent circuit malfunction.