MIC2072-1PCQS

Controllers Overview

The MIC2072-1PCQS is a dual-channel USB power controller designed for ACPI S0/S3 state transitions. It integrates two independent switches with make-before-break switching to ensure glitch-free transitions between the MAIN and AUX supplies. The device features bi-level current limiting, providing a 500mA minimum threshold in the active S0 state and reducing to 100mA in the standby S3 state to preserve auxiliary supply regulation. It includes thermal shutdown protection at 140°C per channel or 160°C for both channels, undervoltage lockout, and fault status outputs. The MIC2072 variant latches the output off upon detecting an overcurrent condition exceeding 5ms, requiring manual reset via the EN input or load removal.

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
• Latched thermal shutdown options with auto-reset capability

Controllers Applications

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

Controllers Procurement Notes

Verify the component manufacturer origin, as the datasheet identifies Micrel as the original designer while Microchip Technology is listed as the brand. Confirm that the specific ordering suffix corresponds to the Active High enable logic and internal pull-up configuration documented for this part number. Ensure the package type matches the 16-lead QSOP specification provided in the official documentation.

Controllers Selection Notes

Select the MIC2072-1PCQS when circuit breaker functionality is required to latch outputs off during overcurrent events lasting more than 5ms. Choose this variant over the MIC2012 if automatic reset upon load removal is desired. Ensure the application requires active-high enable control and operates within the specified 0°C to +70°C temperature range.

Controllers Part Context

This component belongs to the MIC2012/MIC2072 family of USB power controllers. The MIC2072 series specifically introduces latching behavior for fault conditions compared to the standard MIC2012. The -1 suffix indicates active-high enable inputs, while the -2 suffix denotes active-low enable inputs. Both variants share identical electrical characteristics and pin configurations.

Controllers Replacement Considerations

MIC2012-1PCQS

Controllers FAQ

How does the MIC2072 handle overcurrent conditions?

The MIC2072 latches the output off if an overcurrent condition persists for more than 5ms. The output remains latched until the EN input is toggled or the load is removed.

What is the purpose of the bi-level current limit?

The bi-level current limit adjusts the threshold based on the ACPI state. It provides 500mA in the active S0 state and reduces to 100mA in the standby S3 state to maintain voltage regulation on the auxiliary supply.

How is the latched output reset?

The latched output can be reset by toggling the EN input or by removing the faulty load. A 1mA pull-up current source activates to facilitate automatic reset when the load is removed.