SI1040X-T1-E3

Overview

The SI1040X-T1-E3 is a single-channel power load switch manufactured by Vishay Siliconix. It integrates a P-channel MOSFET with an integrated level shifter, enabling direct control from low-voltage logic inputs while switching higher voltage loads. The device operates within a supply voltage range of 2.5V to 20V and supports continuous output currents up to 4A. Packaged in a compact SC-89-6 surface-mount format, it features low on-resistance for efficient power distribution. The component includes built-in protection mechanisms such as current limiting and thermal shutdown to safeguard connected circuits during fault conditions.

Feature Summary

• Integrates a P-channel MOSFET with a dedicated level-shifting circuit for seamless interface with low-voltage logic controllers.
• Provides robust overcurrent protection through internal current limiting to prevent damage during short-circuit events.
• Includes thermal shutdown functionality to automatically disable the switch when excessive junction temperatures are detected.

Applications

• Power distribution networks in portable electronic devices requiring efficient load management.
• Peripheral driver circuits in computing systems where isolated power switching is necessary.
• Battery-powered equipment utilizing high-current loads controlled by low-voltage microcontrollers.

Procurement Notes

Verify the specific suffix 'E3' confirms lead-free compliance and RoHS adherence before procurement. Confirm the SC-89-6 package variant matches your PCB footprint requirements. Check for end-of-life status or obsolescence notifications from Vishay, as availability may be restricted. Ensure the operating voltage range aligns with your system's logic levels to guarantee proper level-shifting performance.

Selection Notes

Select this component when a single-channel high-current switch is needed with direct low-voltage logic control. The integrated level shifter eliminates the need for external gate drive components, simplifying the design. Consider the SC-89-6 package size constraints and thermal dissipation capabilities relative to your application's power budget. Verify that the 4A current rating meets the peak and continuous load requirements of the target peripheral.

Part Context

This part belongs to the SI10xx series of power load switches designed for efficient power management. It represents Vishay's integration of discrete MOSFET technology with control logic into a single compact package. The series is commonly used in applications requiring reliable power sequencing and load isolation in space-constrained environments.

FAQ

How does the integrated level shifter function?

The level shifter allows the switch to be controlled by logic signals lower than the load voltage, enabling direct interfacing with 1.8V, 3.3V, or 5V logic sources while switching loads up to 20V.

What protection features are included?

The device incorporates current limiting to protect against short circuits and thermal shutdown to prevent damage from overheating, ensuring safe operation under fault conditions.