MIC2072-2PZQS

Controllers Overview

The MIC2072-2PZQS is a dual-channel USB power controller manufactured by Microchip Technology, housed in a 16-lead QSOP package. It supports ACPI S0/S3 state transitions via an integrated switching matrix. In the active S0 state (S3# HIGH), it connects MAIN inputs to outputs with a 100mΩ on-resistance and a minimum 500mA current limit. In the standby S3 state (S3# LOW), it switches to AUX inputs with a 500mΩ on-resistance and a reduced 100mA current limit. The device features make-before-break switching for glitch-free transitions and includes undervoltage lockout. Overcurrent conditions lasting longer than 5ms latch the output off, requiring EN toggling or load removal to reset.

Controllers Feature Summary

• Integrated switching matrix supporting ACPI S0/S3 state transitions without external FETs
• Bi-level current limiting preserves auxiliary supply voltage regulation during standby mode
• Latched circuit breaker operation prevents back-feed of auxiliary supply onto main supply
• Thermally isolated channels ensure fault isolation between independent switches

Controllers Applications

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

Controllers Procurement Notes

Verify the specific suffix 'PZQS' against official Microchip documentation to confirm lead-free status and package type. Ensure the active-low enable configuration matches system logic requirements. Confirm that the latching behavior aligns with the desired fault recovery strategy for the target application design.

Controllers Selection Notes

Select this component when designing systems requiring compliant USB power distribution with ACPI S3 wakeup support. The MIC2072 variant is appropriate where latching protection is preferred over auto-reset to minimize power consumption during faults. Verify that the 16-lead QSOP package fits the available PCB footprint and thermal constraints.

Controllers Part Context

This part belongs to the MIC2012/MIC2072 family of USB power controllers originally developed by Micrel, now under Microchip Technology. The MIC2072 series specifically adds latching capabilities compared to the standard MIC2012, providing a circuit breaker mode of operation. The '-2' designation indicates active-low enable inputs.

Controllers Replacement Considerations

MIC2012-2PZQS offers identical functionality but lacks the latching feature, resetting automatically upon fault clearance.

Controllers FAQ

How does the MIC2072-2PZQS handle overcurrent conditions?

It detects overcurrent conditions lasting longer than 5ms and latches the output off. The output remains disabled 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 reduces the threshold from 500mA in S0 state to 100mA in S3 state, ensuring the auxiliary supply maintains voltage regulation even during fault conditions while in standby.

How are the FAULT outputs configured?

The FAULT outputs are active-low signals with an internal pull-up configuration. They assert low during overcurrent or thermal shutdown events.