MIC2012ZM

Controllers Overview

The MIC2012ZM is a dual-channel USB power controller designed for ACPI S3 state wakeup support. It switches between a 5V MAIN supply and a 5V AUX supply based on the S3# input level. In the active S0 state (S3# HIGH), it provides a minimum 500mA current limit with 100mΩ on-resistance. In the standby S3 state (S3# LOW), it reduces the current limit to 100mA with 500mΩ on-resistance to preserve auxiliary supply regulation. The device features make-before-break switching, thermal shutdown protection, and open-drain fault status outputs.

Controllers Feature Summary

• Integrated switching matrix supports ACPI S0/S3 state transitions without external FET circuits
• Bi-level current-limit preserves auxiliary supply voltage regulation in standby mode
• Make-before-break switching ensures glitch-free transitions between states
• Thermally isolated channels prevent faults in one channel from affecting the other

Controllers Applications

• Desktop PCs
• Notebook PCs
• Notebook Docking stations
• LAN Servers
• PC Motherboards

Controllers Procurement Notes

Verify the specific ordering suffix 'ZM' against the manufacturer's official documentation to confirm package type and temperature range specifications. Ensure compatibility with the required enable logic and fault output configuration for the target application design.

Controllers Selection Notes

Select this component when designing USB power distribution that requires distinct current limits for active and standby ACPI states. Verify that the 8-lead SOIC package thermal resistance meets the system's power dissipation requirements under maximum load conditions.

Controllers Part Context

This part belongs to the MIC2012/MIC2072 family of USB power controllers manufactured by Micrel. While Microchip Technology acquired Micrel, the original datasheet identifies Micrel as the manufacturer. The ZM suffix denotes the standard Pb-Free version in an 8-lead SOIC package.

Controllers Replacement Considerations

MIC2012BM and MIC2012CM are alternative variants within the same series offering different fault output configurations.