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MIC2039EYMT-TR Devices Electronic Features

±5% Current-Limit Accuracy

InputSupplyRangefrom2.5Vto5.5V

LowQuiescentCurrent:100μATypical(Switch ON)

75mΩTypicalRDS(ON)at5V

0.2Ato2.5AAdjustableOutputCurrent

Kickstart:MomentarySecondaryCurrent-Limit Threshold (120 ms period)

Soft-StartFunctionality

Undervoltage Lockout (UVLO)

Fast10μsShort-CircuitResponseTime (Non-Kickstart Options)

Fault Status Output Flag

Logic Controlled Enable (Active-High, Active-Low)

Thermal Shutdown

PinCompatiblewithMIC2009/MIC2019

6-Pin2mmx2mmThinDFNand6-PinSOT-23 Packages

JunctionTemperatureRangefrom–40°Cto +125°C

Product Applications

USBPeripheralsandUSB2.0/3.0-Compatible • DTV/STB

NotebooksandConsumerElectronics

GeneralPurposePowerDistribution

General Description

The MIC2039 is a high-side MOSFET power distribution switch that provides increased system reliability by using 5% current-limit accuracy.The MIC2039 has an operating input voltage range from 2.5V to 5.5V, is internally current-limited, and has thermal shutdown to protect the device and system. The MIC2039 is offered with either active-high or active-low logic level enable input controls. It has an open drain fault status output flag with a built-in 32 ms delay that asserts low during overcurrent or thermal-shutdown conditions.

The MIC2039 features an adjustable output current limit that is resistor-programmable from 0.2A to 2.5A. The MIC2039 also offers a unique, kickstart feature that allows momentary high-current surges up to the secondary current limit (ILIMIT_2nd) during startup or while operating in steady-state. This is useful for charging loads with high inrush currents, such as capacitors. After an overcurrent condition is established, these switches enter into a constant current-limit mode unless the die temperature exceeds the thermal-shutdown specification.

The MIC2039 is available in 6-pin SOT-23 and 6-pin 2 mm x 2 mm thin DFN packages. The MIC2039 has an operating junction temperature range of –40°C to +125°C.