MAX14586/MAX14590
High-Current Overvoltage Protectors
with Adjustable OVLO
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General Description
The MAX14586/MAX14590 overvoltage protection devic-
es feature a low 48mI (typ) on-resistance (RON) internal
FET and protect low-voltage systems against voltage
faults up to +36V. When the input voltage exceeds the
overvoltage threshold, the internal FET is turned off to
prevent damage to the protected components.
The overvoltage protection threshold can be adjusted
with optional external resistors to any voltage between
4V and 20V. With the OVLO input set below the exter-
nal OVLO select voltage, the devices automatically
choose the internal accurate trip thresholds. The internal
overvoltage thresholds (OVLO) are preset to 7V typical
(MAX14586) or 15V typical (MAX14590). The devices are
also protected against overcurrent events by an internal
thermal shutdown.
The MAX14586/MAX14590 are offered in a small, 8-pin
TDFN package with exposed pad and operate over the
-40NC to +85NC extended temperature range.
Applications
Smartphones
Tablet PCs
Mobile Internet Devices
Benefits and Features
S Protect High-Power Portable Devices
Wide Operating Input Voltage Protection
from +2.2V to +36V
3A Continuous Current Capability
Integrated 40mI (typ) n-Channel MOSFET
Switch
S Flexible Overvoltage Protection Design
Adjustable Overvoltage Protection Trip Level
Wide Adjustable OVLO Threshold Range
from +4V to +20V
Preset Internal Accurate OVLO
Thresholds:
7V ±2.9% (MAX14586)
15V ±3.3% (MAX14590)
S Additional Protection Features Increase System
Reliability
Soft-Start to Minimize In-Rush Current
Internal 15ms Startup Debounce
Thermal-Shutdown Protection
S Minimize PCB Area
8-Pin TDFN (2mm x 2mm) Package
Typical Application Circuit
19-5818; Rev 0; 3/11
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part, refer to: www.maxim-ic.com/MAX14586.related
MAX14586
MAX14590
IN
OVLO
GND
IN
OUT
OUT
R1*
1µF
POWER
ADAPTER CHARGER
PMIC
Li-ION
BATTERY
R2*
*R1 AND R2 ARE ONLY REQUIRED FOR ADJUSTABLE OVLO; OTHERWISE, CONNECT OVLO TO GND.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
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MAX14586/MAX14590
High-Current Overvoltage Protectors
with Adjustable OVLO
(All voltages referenced to GND.)
IN ...........................................................................-0.3V to +40V
OUT ............................................................-0.3V to (VIN + 0.3V)
OVLO .......................................................................-0.3V to +6V
Continuous IN, OUT Current (Note 1) .....................................3A
Peak IN, OUT Current (10ms) .................................................5A
Continuous OVLO Current ..................................................50FA
Continuous Power Dissipation (TA = +70NC)
TDFN (derate 11.9mW/NC above +70NC) ....................954mW
Operating Temperature Range .......................... -40NC to +85NC
Junction Temperature .....................................................+150NC
Storage Temperature Range ............................ -65NC to +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
TDFN
Junction-to-Ambient Thermal Resistance (BJA) .......83.9NC/W
Junction-to-Case Thermal Resistance (BJC) .............. 37NC/W
ABSOLUTE MAXIMUM RATINGS
Note 2: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
PACKAGE THERMAL CHARACTERISTICS (Note 2)
ELECTRICAL CHARACTERISTICS
(VIN = +2.2V to +36V, TA = -40NC to +85NC, unless otherwise noted. Typical values are at VIN = +5.0V and TA = +25NC.) (Note 3)
Note 1: Continuous current limited by thermal design.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Voltage Range VIN 2.2 36 V
Input Supply Current IIN VIN < 5V 65 120 FA
IN Overvoltage Trip Level VIN_OVLO
VIN rising MAX14586 6.8 7 7.2
V
MAX14590 14.5 15 15.5
VIN falling MAX14586 6.73 6.93 7.13
MAX14590 14.35 14.85 15.35
IN Overvoltage Lockout
Hysteresis VIN_OVLO_HYS 1 %
OVLO Set Threshold VOVLO_THRESH 1.18 1.223 1.26 V
Adjustable OVLO Threshold
Range 4 20 V
External OVLO Select
Threshold VOVLO_SELECT 0.25 0.35 0.4 V
Switch On-Resistance RON
IOUT = 100mA, TA = +25°C, VIN = 5V 48 81 mI
IOUT = 100mA, TA = -40°C to +85°C 115
OVLO Clamp ICLAMP = 10FA, VIN = 5V 3.6 V
OUT Capacitor COUT 1000 FF
OVLO Input Leakage Current IOVLO VOVLO_THRESH = 1.221V -100 +100 nA
Thermal Shutdown +150 NC
Thermal Shutdown Hysteresis 20 NC
*The parametric values (min, typ, max limits) shown in the Electrical Characteristics table supersede values quoted elsewhere in this data sheet.
����������������������������������������������������������������� Maxim Integrated Products 3
MAX14586/MAX14590
High-Current Overvoltage Protectors
with Adjustable OVLO
Note 3: All specifications are 100% production tested at TA = +25NC, unless otherwise noted. Specifications are over -40NC to
+85NC and are guaranteed by design.
ELECTRICAL CHARACTERISTICS* (continued)
(VIN = +2.2V to +36V, TA = -40NC to +85NC, unless otherwise noted. Typical values are at VIN = +5.0V and TA = +25NC.) (Note 3)
Figure 1. Timing Diagram
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
TIMING CHARACTERISTICS (Figure 1)
Debounce Time tINDBC Time from 2.2V < VIN < VIN_OVLO to
VOUT = 10% of VIN 15 ms
Soft-Start Time tSS Soft-start time beginning from VOUT =
10% of VIN to soft-start off 15 ms
Switch Turn-On Time tON
2.2V < VIN < VIN_OVLO, RLOAD = 100I,
CLOAD = 100FF; VOUT from 10% to 90%
of VIN
1.48
ms
2.2V < VIN < VIN_OVLO, RLOAD = 100I,
CLOAD = 1mF; VOUT from 10% to 90%
of VIN
5.24
Switch Turn-Off Time tOFF
VIN > VOVLO_THRESH to VOUT = 80% of
VIN_OVLO; RLOAD = 100I, VIN rising at
2V/Fs
0.8 3.5 Fs
OVLO
2.2V
IN
tON tON
VIN_OVLO
tOFF
90%
80% VIN_OVLO
10%
90%
10%
tINDBC tSS tSS
tINDBC
OUT
NOTE: WAVEFORMS ARE NOT TO SCALE.
*The parametric values (min, typ, max limits) shown in the Electrical Characteristics table supersede values quoted elsewhere in this data sheet.
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MAX14586/MAX14590
High-Current Overvoltage Protectors
with Adjustable OVLO
Typical Operating Characteristics
(VIN = +5.0V, CIN = 1FF, COUT = 1FF, TA = +25NC, unless otherwise noted.)
NORMALIZED DEBOUNCE TIME
vs. TEMPERATURE
MAX14586 toc06
TEMPERATURE (°C)
NORMALIZED DEBOUNCE TIME
603510-15
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
0.5
-40 85
NORMALIZED EXTERNAL OVLO SELECT
THRESHOLD vs. TEMPERATURE
MAX14586 toc05
TEMPERATURE (°C)
NORMALIZED EXTERNAL OVLO SELECT THRESHOLD
603510-15
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
0.5
-40 85
NORMALIZED EXTERNAL OVLO SET
THRESHOLD vs. TEMPERATURE
MAX14586 toc04
TEMPERATURE (°C)
NORMALIZED EXTERNAL OVLO SET THRESHOLD
603510-15
0.96
0.97
0.98
0.99
1.00
1.01
1.02
1.03
1.04
1.05
0.95
-40 85
VIN = 6V
NORMALIZED OVLO THRESHOLD
vs. TEMPERATURE
MAX14586 toc03
TEMPERATURE (°C)
NORMALIZED OVLO THRESHOLD
603510-15
0.96
0.97
0.98
0.99
1.00
1.01
1.02
1.03
1.04
1.05
0.95
-40 85
NORMALIZED RON vs. TEMPERATURE
MAX14586 toc02
TEMPERATURE (°C)
NORMALIZED RON
603510-15
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
0.5
-40 85
IOUT = 100mA
VIN = 3.6V
VIN = 5V
IN SUPPLY CURRENT vs. IN VOLTAGE
MAX14586 toc01
IN VOLTAGE (V)
IN SUPPLY CURRENT (µA)
21147
50
100
150
200
250
300
350
400
0
0 28
OVLO = GND (MAX14586)
TA = +85°C
TA = +25°C
TA = -40°C
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MAX14586/MAX14590
High-Current Overvoltage Protectors
with Adjustable OVLO
Typical Operating Characteristics (continued)
(VIN = +5.0V, CIN = 1FF, COUT = 1FF, TA = +25NC, unless otherwise noted.)
OVERVOLTAGE FAULT RESPONSE
(IOUT = 0.5A, COUT = 100µF)
MAX14586 toc09
10µs/div
0V
0V
0mA
VIN
5V/div
VOUT
5V/div
IOUT
500mA/div
POWER-UP RESPONSE
(IOUT = 0.5A, COUT = 1000µF)
MAX14586 toc08
10ms/div
0V
0V
0mA
VIN
5V/div
VOUT
5V/div
IOUT
500mA/div
POWER-UP RESPONSE
(IOUT = 0.5A, COUT = 100µF)
MAX14586 toc07
10ms/div
0V
0V
0mA
VIN
5V/div
VOUT
5V/div
IOUT
500mA/div
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MAX14586/MAX14590
High-Current Overvoltage Protectors
with Adjustable OVLO
Pin Configuration
Pin Description
PIN NAME FUNCTION
1, 2 IN
Voltage Input. Bypass IN with a 1FF ceramic capacitor as close as possible to the device to obtain
Q15kV Human Body Model (HBM) ESD protection. Connect both IN pins together for proper operation. IN
is protected to Q2kV HBM when IN is not bypassed with a capacitor to GND.
3 OVLO
External OVLO Adjustment. Connect OVLO to GND when using the internal threshold. Connect a resistor-
divider to OVLO to set a different OVLO threshold; this external resistor-divider is completely independent
from the internal threshold.
4, 5 I.C. Internally Connected. Connect I.C. to GND or leave I.C. unconnected.
6 GND Ground
7, 8 OUT Output Voltage. Output of internal switch. Connect both OUT pins together for proper operation.
— EP Exposed Pad. Connect EP to ground. For enhanced thermal dissipation, connect EP to a copper area as
large as possible. Do not use EP as the only ground connection.
1
+
3 4
8 6 5
*EP
*CONNECT EXPOSED PAD TO GND.
OUT GND I.C.
2
7
OUT
IN OVLO I.C.IN
TDFN
(2mm x 2mm)
TOP VIEW
MAX14586
MAX14590
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MAX14586/MAX14590
High-Current Overvoltage Protectors
with Adjustable OVLO
Detailed Description
The MAX14586/MAX14590 overvoltage protection devices
feature a low on-resistance (RON) internal FET and protect
low-voltage systems against voltage faults up to +36V. If
the input voltage exceeds the overvoltage threshold, the
internal FET is turned off to prevent damage to the pro-
tected components. The 15ms debounce time prevents
false turn-on of the internal FET during startup.
Device Operation
The devices have timing logic that controls the turn-on
of the internal FET. If VIN < VOVLO_THRESH, the internal
charge pump is enabled. The charge-pump startup, after
a 15ms debounce delay, turns on the internal FET (see
the Functional Diagram). After the debounce time, soft-
start limits the FET inrush current for 15ms (typ). At any
time, if VIN rises above VOVLO_THRESH, OUT is discon-
nected from IN.
Internal Switch
The devices incorporate an internal FET with a 48mI
(typ) RON. The FET is internally driven by a charge pump
that generates a necessary gate voltage above IN. The
internal FET can pass more than 5A inrush current.
Overvoltage Lockout (OVLO)
The MAX14586 has a 7V (typ) overvoltage threshold. The
MAX14590 has a 15V (typ) overvoltage threshold.
Thermal Shutdown Protection
The devices feature thermal shutdown circuitry. The inter-
nal FET turns off when the junction temperature exceeds
+150NC (typ). The device exits thermal shutdown after
the junction temperature cools by 20NC (typ).
Applications Information
IN Bypass Capacitor
For most applications, bypass IN to GND with a 1FF
ceramic capacitor as close as possible to the device
to enable Q15kV (HBM) ESD protection on IN. If Q15kV
(HBM) ESD is not required, there is no capacitor required
at IN. If the power source has significant inductance due
to long lead length, take care to prevent overshoots due
to the LC tank circuit and provide protection if necessary
to prevent exceeding the +40V absolute maximum rating
on IN.
OUT Output Capacitor
The slow turn-on time provides a soft-start function that
allows the devices to charge an output capacitor up to
1000FF without turning off due to an overcurrent condition.
Functional Diagram
MAX14586
MAX14590
VBG
REFERENCE
CHARGE
PUMP
LOGIC
CONTROL
SEL
TEMPERATURE
FAULTS
IN
IN
OVLO
GND
OUT
OUT
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MAX14586/MAX14590
High-Current Overvoltage Protectors
with Adjustable OVLO
External OVLO Adjustment Functionality
If OVLO is connected to ground, the internal OVLO com-
parator uses the internally set OVLO value.
If an external resistor-divider is connected to OVLO and
VOVLO exceeds the OVLO select voltage (VOVLO_SELECT),
the internal OVLO comparator reads the IN fraction fixed
by the external resistor-divider.
R1 = 1MI is a good starting value for minimum current
consumption. Since VIN_OVLO, VOVLO_THRESH, and
R1 are known, R2 can be calculated from the following
formula:
IN_OVLO OVLO_THRESH R1
V V 1 R2
= × +
This external resistor-divider is completely independent
from the internal resistor-divider.
ESD Test Conditions
ESD performance depends on a number of conditions.
The devices are specified for Q15kV (HBM) typical ESD
resistance on IN when IN is bypassed to ground with a
1FF ceramic capacitor.
Human Body Model ESD Protection
Figure 2a shows the HBM and Figure 2b shows the
current waveform it generates when discharged into a
low-impedance state. This model consists of a 100pF
capacitor charged to the ESD voltage of interest, which is
then discharged into the device through a 1.5kI resistor.
Figure 2a. Human Body ESD Test Model Figure 2b. Human Body Current Waveform
Chip Information
PROCESS: BiCMOS
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maxim-ic.com/packages. Note that a
“+”, “#”, or “-” in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but
the drawing pertains to the package regardless of RoHS status.
Ordering Information/
Selector Guide
Note: All devices are specified over the -40°C to +85°C oper-
ating temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
*EP = Exposed pad.
PART PIN-PACKAGE TOP
MARK
OVLO
(V)
MAX14586ETA+T 8 TDFN-EP* BNJ 7
MAX14590ETA+T 8 TDFN-EP* BNK 15
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
8 TDFN-EP T822+2 21-0168 90-0065
CHARGE-CURRENT-
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
Cs
100pF
RC
1MΩ
RD
1.5kΩ
HIGH-
VOLTAGE
DC
SOURCE
DEVICE
UNDER
TEST
IP 100%
90%
36.8%
tRL TIME
tDL
CURRENT WAVEFORM
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
IR
10%
0
0
AMPERES
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 9
© 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.
MAX14586/MAX14590
High-Current Overvoltage Protectors
with Adjustable OVLO
Revision History
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 3/11 Initial release —
