SI4542DY-T1-GE3

Overview

The SI4542DY-T1-GE3 is a dual N-channel Power MOSFET manufactured by Vishay Siliconix, utilizing TrenchFET technology. It is housed in an SO-8 surface-mount package designed for high-efficiency switching applications. The device features a drain-source voltage (Vds) rating of 40 V and a continuous drain current (Id) of 19 A at 25°C. Key electrical parameters include a maximum on-resistance (Rds(on)) of 6.5 mΩ at Vgs = 10 V and 7.5 mΩ at Vgs = 4.5 V. The gate-source voltage (Vgs) is rated at ±20 V, with a typical gate charge (Qg) of 22 nC at 10 V. The component operates within a junction temperature range of -55°C to +150°C and supports a power dissipation of 3.2 W.

Feature Summary

• Dual N-channel configuration integrated into a single compact SO-8 package for space-constrained designs.
• TrenchFET technology provides low on-resistance and optimized switching performance.
• Enhanced thermal efficiency through a leadframe-based top-side heated package design.

Applications

• High-frequency synchronous rectification in DC/DC converters.
• Load switching and power management circuits.
• Battery protection modules and smart battery packs.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to ensure correct packaging and compliance status. Confirm that the requested part number matches the exact electrical specifications required for the target application, as minor variations may exist between manufacturing revisions or regional compliance standards.

Selection Notes

Select this component when a dual N-channel solution is required in an SO-8 footprint. Ensure the operating voltage does not exceed the 40 V drain-source limit and that the thermal design accommodates the 3.2 W power dissipation rating. Verify that the gate drive voltage meets the requirements for achieving the specified low Rds(on) values.

Part Context

This part belongs to the Vishay Siliconix SI4 series of TrenchFET MOSFETs. It is specifically engineered for low-voltage, high-current applications where board space is limited. The dual configuration allows for efficient half-bridge or synchronous buck converter implementations without requiring separate discrete components.

Replacement Considerations

Consult official cross-reference lists for verified substitutes. Ensure any replacement maintains the SO-8 pinout compatibility and meets or exceeds the 40 V / 19 A ratings. Verify that the alternative device offers comparable thermal resistance and switching characteristics to maintain circuit performance.