MCZ33879EK

Overview

The MCZ33879EK is a power switch IC manufactured by NXP USA Inc., designed for high-side or low-side switching applications. It features an 1:8 input-to-output ratio, providing eight independent N-channel outputs with a maximum output current of 600mA per channel. The device operates within a load voltage range of 5.5V to 26.5V and requires a supply voltage (Vcc/Vdd) between 3.1V and 5.5V. It utilizes an SPI interface for control and communication. Key electrical characteristics include a typical on-resistance of 750 milliohms and a power dissipation capability of 1.7W. The component supports fault protection mechanisms including fixed current limiting, open load detection, and overvoltage protection. It is housed in a 32-SSOP package with exposed pad and functions across an extended junction temperature range of -40°C to 150°C.

Feature Summary

• Integrates eight independent N-channel power switches controlled via a single serial peripheral interface (SPI) command stream.
• Provides comprehensive diagnostic capabilities including open load detection and fixed current limiting for system reliability.
• Supports flexible configuration as either high-side or low-side switches to accommodate diverse circuit topologies.

Applications

• Industrial automation distributed I/O modules requiring compact multi-channel switching
• Automotive body electronics and lighting control systems
• General-purpose power distribution networks in embedded equipment

Procurement Notes

Verify the specific suffix 'EK' against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Confirm functional equivalence if substituting, as ordering suffixes may indicate variations in packaging or moisture sensitivity levels rather than internal circuit changes. Ensure compliance with RoHS directives and check for end-of-life status before finalizing procurement plans.

Selection Notes

Select this component when designing systems requiring multiple isolated loads driven by a single microcontroller interface. The 1:8 ratio reduces pin count compared to individual drivers. Evaluate thermal performance given the 750 milliohm resistance and 1.7W dissipation limit under expected load conditions. Ensure the host controller supports the required SPI protocol and that the 3.1V to 5.5V supply range aligns with the system architecture.

Part Context

This part belongs to the MCZ33879 family of power switch integrated circuits from NXP Semiconductors. These devices are categorized under Power Management ICs, specifically within the Distribution Switches and Load Drivers subcategory. They are engineered for robust performance in industrial and automotive environments, offering a balance of high current capacity and advanced diagnostic features in a compact surface-mount package.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing PCB footprints and firmware drivers before considering alternative components from other manufacturers.