GENERAL DESCRIPTION The MIC2010 is a dual-channel USB power switch designed to support USB wake-up power distribution requirements from ACPI S3 states. The MIC2010 will switch directly to a 5V-style power supply between the two main supplies and the 5V auxiliary output where the ATX power supply typically provides. The MIC2010 will adjust its current limit threshold according to the ACPI state is in normal Active. The ACPI S0 state current limit is set at 500mA per channel minimum to meet the USB specification for continuous output current. In the S3 state the current limit can be reduced to a value determined by an external resistor to reduce the current which is provided by the auxiliary power supply, thus ensuring that voltage regulation is maintained under fault conditions. The MIC2010 provides a make-before-break switch to ensure an interference-free transition between the S3 and S0 states. Each channel is also thermally isolated from the other so that a failure in one channel will not affect the other. Fault status output signals also provide overcurrent and indicate thermal shutdown conditions. Option​​The output latch of the MIC2070 shuts down a minimum level of 5ms when an overcurrent condition is detected. The output can be reset or switched by the EN input of the MIC2070-1/-2 or by removing the load. The latched output is used to provide the operating mode of the circuit breaker, thereby reducing power consumption during fault conditions.

Features • Complies with USB power distribution specifications • Two fully independent switches • Integrated switch matrix supports ACPI S0/S3 states without external FET switching circuits Modes • Dual-stage current limiting retains auxiliary supply voltage regulation in standby mode • Thermally isolated channel • Thermal shutdown protection • Fault status output with filter to prevent false assertions during hot-plug events Options • Undervoltage Lockout

Application•Desktop Computer•Laptop Computer•Notebook Docking Station•LAN Server•Computer Motherboard