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 UDFN packages. The MIC2039 has an

operating junction temperature range of –40°C to +125°C.

Features

• ±5 Current-Limit Accuracy

• Input Supply Range from 2.5V to 5.5V

• Low Quiescent Current: 100 μA Typical (Switch

ON)

• 75 mΩ Typical RDS(ON) at 5V

• 0.2A to 2.5A Adjustable Output Current

• Kickstart: Momentary Secondary Current-Limit

Threshold (120 ms period)

• Soft-Start Functionality

• Undervoltage Lockout (UVLO)

• Fast 10 μs Short-Circuit Response Time

(Non-Kickstart Options)

• Fault Status Output Flag

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

• Thermal Shutdown

• Pin Compatible with MIC2009/MIC2019

• 6-Pin 2 mm x 2 mm UDFN and 6-Pin SOT-23 Packages

• Junction Temperature Range from –40°C to+125°C

Applications

• USB Peripherals and USB 2.0/3.0-Compatible

• DTV/STB

• Notebooks and Consumer Electronics

• General Purpose Power Distribution