W83L351YG TR

Specialized Overview

The W83L351YG is an ExpressCard power interface switch designed for ExpressCard|34 and ExpressCard|54 modules. It manages three switched outputs: AUXOUT, 3.3VOUT, and 1.5VOUT. The device operates within a 0°C to 70°C ambient temperature range and supports system wake functions. Key electrical parameters include a maximum continuous output current of 1.3A for the 3.3V rail, 650mA for the 1.5V rail, and 275mA for the AUX rail at a junction temperature of 120°C. Input voltage ranges are 3.0V to 3.6V for 3.3VIN and AUXIN, and 1.35V to 1.65V for 1.5VIN. The component includes short circuit protection, thermal shutdown, and overcurrent status reporting via an open-drain OC# pin.

Specialized Feature Summary

• Complies with ExpressCard standards and implementation guidelines
• Integrates short circuit and thermal protection mechanisms
• Supports system wake functionality and standby modes
• Features TTL-logic compatible inputs for control signals

Specialized Applications

• ExpressCard|34 module power management
• ExpressCard|54 module power management
• PCI Express-based card power switching
• USB ExpressCard power switching

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and tape/reel specifications. Ensure the component meets the required environmental operating temperature range for the target application. Cross-reference the datasheet revision history to confirm the availability of the latest version and check for any obsolete part numbers within the series.

Specialized Selection Notes

Select this component for applications requiring compliant power sequencing for ExpressCard peripherals. Evaluate the input voltage requirements to ensure compatibility with the host system's 3.3V, 1.5V, and AUX rails. Consider the thermal performance and current limits when designing the PCB layout, particularly for high-load scenarios involving the 3.3V or AUX outputs.

Specialized Part Context

The W83L351YG belongs to Nuvoton's specialized interface switch family, specifically engineered for portable computing expansion slots. It addresses the power delivery and control logic requirements defined by the ExpressCard standard. This series ensures reliable operation in laptop and mobile workstation environments where space constraints and power efficiency are critical design factors.

Specialized Replacement Considerations

Check the datasheet revision history for the removal of the W83L351G part number. Verify functional equivalence if substituting with other ExpressCard power switches from different manufacturers, ensuring pinout compatibility and compliance with EC100115.