MIC2070-1PZQS

Controllers Overview

The MIC2070-1PZQS 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 auxiliary supply based on the S3# control input. The device features make-before-break switching for glitch-free transitions and bi-level current limiting to preserve auxiliary supply regulation during standby. In active states, it provides a minimum 500mA current limit per channel, while the auxiliary mode allows adjustable limits via external resistors. The MIC2070 variant includes a circuit breaker function that latches outputs off upon sustained overcurrent conditions.

Controllers Feature Summary

• Integrated switching matrix supports ACPI S0/S3 state transitions without external FET circuits
• Circuit breaker options with auto-reset functionality
• Thermally isolated channels prevent fault propagation between ports
• Fault status outputs with filter prevents false assertions during hot-plug events

Controllers Applications

• Desktop PCs
• Notebook PCs
• Notebook docking stations
• LAN Servers
• PC motherboard

Controllers Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity and pin alignment against the 16-lead QSOP specification. Ensure compliance with RoHS directives and check for specific manufacturing lot codes if required for traceability. Validate that the ordering suffix matches the intended enable logic and temperature range before finalizing procurement orders.

Controllers Selection Notes

Select this component when designing systems requiring compliant USB power distribution with ACPI S3 wakeup support. Choose the MIC2070 variant specifically for applications needing circuit breaker behavior with latched output shutdown during faults. Ensure the RSET resistor values are calculated correctly to define the auxiliary current-limit threshold according to the 18/RSET formula. Verify that the operating ambient temperature remains within the specified commercial range for the standard version.

Controllers Part Context

This part belongs to the MIC2010/2070 family of USB power controllers produced originally by Micrel. The '1' suffix indicates an active-high enable function, while the 'P' denotes Pb-Free construction. The 'Z' suffix typically signifies RoHS compliance in Micrel's nomenclature. These devices were designed to replace discrete MOSFET solutions, simplifying the design of USB hub and port power management circuits in computing platforms.

Controllers Replacement Considerations

Direct replacements include the MIC2010-1PZQS for non-latching applications. Cross-vendor equivalents may require significant schematic redesign due to differences in internal switching matrices and control logic. Verify pin compatibility and electrical characteristics carefully before substituting.