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.