MIC2012-1PCQS-TR

Controllers Overview

The MIC2012-1PCQS-TR is a dual-channel USB power controller manufactured by Micrel, designed to manage power distribution for USB wakeup from the ACPI S3 state. It integrates two independent switches that transition between a 5V MAIN supply and a 5V AUX supply based on the S3# control input. In the active S0 state (S3# HIGH), it provides a minimum current limit of 500mA per channel with an on-resistance of 140mΩ maximum. In the standby S3 state (S3# LOW), the current limit reduces to 100mA minimum with an on-resistance of 700mΩ maximum to preserve auxiliary supply regulation. The device operates within a voltage range of 4.5V to 5.5V and supports an ambient temperature range of 0°C to +70°C.

Controllers Feature Summary

• Integrated switching matrix supporting ACPI S0/S3 state transitions without external FETs
• Bi-level current limiting to maintain auxiliary supply voltage regulation in standby mode
• Make-before-break switching ensures glitch-free transitions between power 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 'TR' indicates tape and reel packaging when sourcing components. Confirm the manufacturer designation as Micrel, noting historical corporate acquisitions may affect branding on documentation or packages. Ensure the component matches the 16-lead QSOP package format specified for this part number variant.

Controllers Selection Notes

Select the MIC2012-1PCQS variant specifically for applications requiring active-high enable logic; the -2 variant utilizes active-low logic. This component is suitable for designs needing integrated USB power switching compliant with ACPI standards. Consider the thermal resistance of the QSOP package when calculating junction temperatures under high load conditions.

Controllers Part Context

This component belongs to the MIC2012/MIC2072 family of USB power controllers. While the MIC2012 automatically resets upon fault removal or cooling, the MIC2072 option features a latching circuit breaker mode that requires manual intervention to reset. Both variants share identical electrical characteristics regarding switching speeds and current limits.

Controllers Replacement Considerations

Direct functional replacements include the MIC2012-2PCQS for active-low enable requirements. The MIC2072 series offers similar switching capabilities but includes output latching upon overcurrent detection. Verify pin compatibility and enable logic polarity before substituting.