MIC2012-2PZQS

Controllers Overview

The MIC2012-2PZQS is a dual-channel USB power controller manufactured by Micrel, designed to manage power distribution for USB wakeup from the ACPI S3 state. It operates within a supply voltage range of +4.5V to +5.5V and supports an ambient temperature range of 0°C to +70°C. The device features two independent switches with make-before-break switching to ensure glitch-free transitions between main and auxiliary supplies. Key electrical parameters include a maximum on-resistance of 140mΩ for the MAIN switch and 700mΩ for the AUX switch. Current-limit thresholds are set at a minimum of 500mA in the active S0 state and 100mA in the standby S3 state.

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
• Thermally isolated channels prevent faults in one channel from affecting the other
• Latched output options provide circuit breaker mode operation to reduce power consumption during fault conditions

Controllers Applications

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

Controllers Procurement Notes

Verify that the specific ordering suffix PZQS corresponds to the Active Low enable logic and Internal Pull-Up configuration as documented in the manufacturer's ordering information table. Confirm package type is 16-lead QSOP. Ensure design compliance with the specified operating temperature range of 0°C to +70°C. Check for any RoHS or environmental compliance updates directly from the supplier documentation prior to finalizing procurement orders.

Controllers Selection Notes

Select this component when designing systems requiring ACPI S3 state support for USB wakeup functionality. The MIC2012-2 variant specifically provides Active Low enable inputs, which may be necessary depending on the control logic levels available in the host system. Consider the thermal resistance of the 16-lead QSOP package when calculating junction temperatures under maximum load conditions to ensure reliable operation within the specified thermal limits.

Controllers Part Context

This part belongs to the MIC2012/MIC2072 family of USB power controllers. While the MIC2012 offers automatic reset upon thermal shutdown, the MIC2072 variants feature latching behavior for overcurrent conditions. The MIC2012-2PZQS is distinct from the MIC2012-1PZQS primarily due to its Active Low enable input polarity. Both share the same dual-channel architecture and switching matrix capabilities for managing main and auxiliary power rails.

Controllers Replacement Considerations

Direct substitutes within the same family include the MIC2012-1PZQS, which differs only in having an Active High enable input instead of Active Low. Other variants like the MIC2012PCM offer different enable configurations but utilize an 8-lead SOIC package rather than the 16-lead QSOP. Verify pin compatibility and enable logic requirements before substituting.