19-5818; Rev 0; 3/11
MAX14586/MAX14590
High-Current Overvoltage Protectors
with Adjustable OVLO
General Description
The MAX14586/MAX14590 overvoltage protection devic-
es feature a low 48mI (typ) on-resistance (R
ON
) 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.
Benefits and Features
S
Protect High-Power Portable Devices
Wide Operating Input Voltage Protection
from +2.2V to +36V
Continuous Current Capability
3A
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
Ordering Information
appears at end of data sheet.
Applications
Smartphones
Tablet PCs
Mobile Internet Devices
Typical Application Circuit
POWER
ADAPTER
IN
1µF
R1*
OVLO
R2*
GND
IN
OUT
OUT
CHARGER
Li-ION
BATTERY
MAX14586
MAX14590
PMIC
*R1 AND R2 ARE ONLY REQUIRED FOR ADJUSTABLE OVLO; OTHERWISE, CONNECT OVLO TO GND.
For related parts and recommended products to use with this part, refer to:
www.maxim-ic.com/MAX14586.related
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Maxim Integrated Products
1
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.
MAX14586/MAX14590
High-Current Overvoltage Protectors
with Adjustable OVLO
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
IN ...........................................................................-0.3V to +40V
OUT ............................................................-0.3V to (V
IN
+ 0.3V)
OVLO .......................................................................-0.3V to +6V
Continuous IN, OUT Current (Note 1) .....................................3A
Peak IN, OUT Current (10ms) .................................................5A
Continuous OVLO Current ..................................................50FA
Note 1:
Continuous current limited by thermal design.
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.
Continuous Power Dissipation (T
A
= +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
PACKAGE THERMAL CHARACTERISTICS (Note 2)
TDFN
Junction-to-Ambient Thermal Resistance (B
JA
) .......83.9NC/W
Junction-to-Case Thermal Resistance (B
JC
) .............. 37NC/W
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.
ELECTRICAL CHARACTERISTICS
(V
IN
= +2.2V to +36V, T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at V
IN
= +5.0V and T
A
= +25NC.) (Note 3)
PARAMETER
Input Voltage Range
Input Supply Current
SYMBOL
V
IN
I
IN
V
IN
< 5V
V
IN
rising
IN Overvoltage Trip Level
V
IN_OVLO
V
IN
falling
IN Overvoltage Lockout
Hysteresis
OVLO Set Threshold
Adjustable OVLO Threshold
Range
External OVLO Select
Threshold
Switch On-Resistance
OVLO Clamp
OUT Capacitor
OVLO Input Leakage Current
Thermal Shutdown
Thermal Shutdown Hysteresis
C
OUT
I
OVLO
V
OVLO_THRESH
= 1.221V
-100
+150
20
V
OVLO_SELECT
R
ON
I
OUT
= 100mA, T
A
= +25°C, V
IN
= 5V
I
OUT
= 100mA, T
A
= -40°C to +85°C
I
CLAMP
= 10FA, V
IN
= 5V
3.6
1000
+100
V
IN_OVLO_HYS
V
OVLO_THRESH
1.18
4
0.25
0.35
48
MAX14586
MAX14590
MAX14586
MAX14590
6.8
14.5
6.73
14.35
CONDITIONS
MIN
2.2
65
7
15
6.93
14.85
1
1.223
1.26
20
0.4
81
115
TYP
MAX
36
120
7.2
15.5
7.13
15.35
%
V
V
V
mI
V
FF
nA
NC
NC
V
UNITS
V
FA
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Maxim Integrated Products
2
*The
parametric values (min, typ, max limits) shown in the Electrical Characteristics table supersede values quoted elsewhere in this data sheet.
MAX14586/MAX14590
High-Current Overvoltage Protectors
with Adjustable OVLO
ELECTRICAL CHARACTERISTICS* (continued)
(V
IN
= +2.2V to +36V, T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at V
IN
= +5.0V and T
A
= +25NC.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
Time from 2.2V < V
IN
< V
IN_OVLO
to
V
OUT
= 10% of V
IN
Soft-start time beginning from V
OUT
=
10% of V
IN
to soft-start off
2.2V < V
IN
< V
IN_OVLO
, R
LOAD
= 100I,
C
LOAD
= 100FF; V
OUT
from 10% to 90%
of V
IN
2.2V < V
IN
< V
IN_OVLO
, R
LOAD
= 100I,
C
LOAD
= 1mF; V
OUT
from 10% to 90%
of V
IN
V
IN
> V
OVLO_THRESH
to V
OUT
= 80% of
V
IN_OVLO
; R
LOAD
= 100I, V
IN
rising at
2V/Fs
MIN
TYP
MAX
UNITS
TIMING CHARACTERISTICS (Figure 1)
Debounce Time
Soft-Start Time
t
INDBC
t
SS
15
15
ms
ms
1.48
ms
5.24
Switch Turn-On Time
t
ON
Switch Turn-Off Time
t
OFF
0.8
3.5
Fs
Note 3:
All specifications are 100% production tested at T
A
= +25NC, unless otherwise noted. Specifications are over -40NC to
+85NC and are guaranteed by design.
OVLO
2.2V
IN
t
ON
90%
OUT
10%
t
INDBC
t
SS
V
IN_OVLO
80% V
IN_OVLO
t
ON
90%
10%
t
INDBC
t
SS
t
OFF
NOTE:
WAVEFORMS ARE NOT TO SCALE.
Figure 1. Timing Diagram
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Maxim Integrated Products
3
*The
parametric values (min, typ, max limits) shown in the Electrical Characteristics table supersede values quoted elsewhere in this data sheet.
MAX14586/MAX14590
High-Current Overvoltage Protectors
with Adjustable OVLO
Typical Operating Characteristics
(V
IN
= +5.0V, C
IN
= 1FF, C
OUT
= 1FF, T
A
= +25NC, unless otherwise noted.)
IN SUPPLY CURRENT vs. IN VOLTAGE
MAX14586 toc01
NORMALIZED R
ON
vs. TEMPERATURE
1.4
1.3
NORMALIZED R
ON
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
OVLO = GND (MAX14586)
T
A
= +85°C
T
A
= +25°C
I
OUT
= 100mA
V
IN
= 3.6V
350
IN SUPPLY CURRENT (µA)
300
250
200
150
100
50
0
0
7
14
V
IN
= 5V
T
A
= -40°C
21
28
-40
-15
10
35
60
85
IN VOLTAGE (V)
TEMPERATURE (°C)
NORMALIZED OVLO THRESHOLD
vs. TEMPERATURE
NORMALIZED EXTERNAL OVLO SET THRESHOLD
MAX14586 toc03
NORMALIZED EXTERNAL OVLO SET
THRESHOLD vs. TEMPERATURE
1.04
1.03
1.02
1.01
1.00
0.99
0.98
0.97
0.96
0.95
-40
-15
10
35
60
85
TEMPERATURE (°C)
1.04
NORMALIZED OVLO THRESHOLD
1.03
1.02
1.01
1.00
0.99
0.98
0.97
0.96
0.95
-40
-15
10
35
60
V
IN
= 6V
85
TEMPERATURE (°C)
NORMALIZED EXTERNAL OVLO SELECT THRESHOLD
NORMALIZED EXTERNAL OVLO SELECT
THRESHOLD vs. TEMPERATURE
MAX14586 toc05
NORMALIZED DEBOUNCE TIME
vs. TEMPERATURE
1.4
NORMALIZED DEBOUNCE TIME
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
MAX14586 toc06
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
-40
-15
10
35
60
1.5
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
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Maxim Integrated Products
4
MAX14586 toc04
1.05
1.05
MAX14586 toc02
400
1.5
MAX14586/MAX14590
High-Current Overvoltage Protectors
with Adjustable OVLO
Typical Operating Characteristics (continued)
(V
IN
= +5.0V, C
IN
= 1FF, C
OUT
= 1FF, T
A
= +25NC, unless otherwise noted.)
POWER-UP RESPONSE
(I
OUT
= 0.5A, C
OUT
= 100µF)
POWER-UP RESPONSE
(I
OUT
= 0.5A, C
OUT
= 1000µF)
MAX14586 toc07
MAX14586 toc08
0V
V
IN
5V/div
V
OUT
5V/div
I
OUT
500mA/div
0V
V
IN
5V/div
V
OUT
5V/div
I
OUT
500mA/div
0V
0V
0mA
10ms/div
0mA
10ms/div
OVERVOLTAGE FAULT RESPONSE
(I
OUT
= 0.5A, C
OUT
= 100µF)
MAX14586 toc09
0V
V
IN
5V/div
0V
V
OUT
5V/div
I
OUT
500mA/div
0mA
10µs/div
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Maxim Integrated Products
5
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