MIC2039 High-Accuracy, High-Side, Adjustable Current-Limit Power Switch Features General Description 5% Current-Limit Accuracy The MIC2039 is a high-side MOSFET power distribution switch that provides increased system Input Supply Range from 2.5V to 5.5V reliability by using 5% current-limit accuracy. Low Quiescent Current: 100 A Typical (Switch ON) The MIC2039 has an operating input voltage range from 2.5V to 5.5V, is internally current-limited, and has at 5V 75m Typical R DS(ON) thermal shutdown to protect the device and system. 0.2A to 2.5A Adjustable Output Current The MIC2039 is offered with either active-high or Kickstart: Momentary Secondary Current-Limit active-low logic level enable input controls. It has an Threshold (120 ms period) open drain fault status output flag with a built-in 32 ms Soft-Start Functionality delay that asserts low during overcurrent or Undervoltage Lockout (UVLO) thermal-shutdown conditions. Fast 10 s Short-Circuit Response Time The MIC2039 features an adjustable output current (Non-Kickstart Options) limit that is resistor-programmable from 0.2A to 2.5A. Fault Status Output Flag The MIC2039 also offers a unique, kickstart feature Logic Controlled Enable (Active-High, Active-Low) that allows momentary high-current surges up to the ) during startup or secondary current limit (I LIMIT 2nd Thermal Shutdown while operating in steady-state. This is useful for Pin Compatible with MIC2009/MIC2019 charging loads with high inrush currents, such as 6-Pin 2 mm x 2 mm Thin DFN and 6-Pin SOT-23 capacitors. After an overcurrent condition is Packages established, these switches enter into a constant Junction Temperature Range from 40C to current-limit mode unless the die temperature exceeds +125C the thermal-shutdown specification. The MIC2039 is available in 6-pin SOT-23 and 6-pin Applications 2 mm x 2 mm thin DFN packages. The MIC2039 has USB Peripherals and USB 2.0/3.0-Compatible an operating junction temperature range of 40C to DTV/STB +125C. Notebooks and Consumer Electronics General Purpose Power Distribution Package Types MIC2039 MIC2039 SOT-23-6 (M6) 2x2 TDFN (MT) (Note 1) VIN 1 6 VOUT 1 VOUT 6 VIN GND 2 5 ILIMIT 2 5 ILIMIT EP GND 4 FAULT/ 3 EN FAULT/ EN 3 4 Note 1: Thin DFN = Pin 1 identifier. 2018 Microchip Technology Inc. DS20005540A-page 1MIC2039 Typical Application Circuit MIC2039 SOT-23-6 MIC2039-AYM6 V V IN OUT VIN VOUT 5V 5V/1A C1 R1 47F C2 1K 6.3V EN ILIMIT 100F R2 6.3V 287 FAULT/ GND Functional Block Diagram POWER FET VIN VOUT SENSE FET THERMAL UVLO SENSOR CURRENT DELAY LIMIT FAULT/ EN CONTROL REFERENCE ILIMIT GND DS20005540A-page 2 2018 Microchip Technology Inc.