MAX14586ETA+T [MAXIM]
Analog Circuit, 1 Func, BICMOS, PDSO8, 2 X 2 MM, ROHS COMPLIANT, TDFN-8;
| 型号： | MAX14586ETA+T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Analog Circuit, 1 Func, BICMOS, PDSO8, 2 X 2 MM, ROHS COMPLIANT, TDFN-8 |
| 文件： | 总9页 (文件大小：1786K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-5818; Rev 0; 3/11
General Description
Benefits and Features
The MAX14586/MAX14590 overvoltage protection devic-
S Protect High-Power Portable Devices
es feature a low 48mI(typ) on-resistance (R ) internal
ꢀWide Operating Input Voltage Protection
from +2.2V to +36V
ꢀ3A Continuous Current Capability
ꢀIntegrated 40mI (typ) n-Channel MOSFET
Switch
ON
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.
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 3.39 (MAX145ꢀ0)
S Additional Protection Features Increase System
Reliability
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.
Soft-Start to Minimize In-Rush Current
Internal 15ms Startup Debounce
Thermal-Shutdown Protection
Applications
S Minimize PCB Area
ꢀ8-Pin TDFN (2mm x 2mm) Package
Smartphones
Tablet PCs
Ordering Information appears at end of data sheet.
Mobile Internet Devices
Typical Application Circuit
POWER
ADAPTER
IN
OUT
OUT
CHARGER
PMIC
1µF
Li-ION
BATTERY
IN
MAX14586
MAX14590
R1*
R2*
OVLO
GND
*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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For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-62ꢀ-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.)
Continuous Power Dissipation (T = +70NC)
A
IN...........................................................................-0.3V to +40V
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
OUT ............................................................-0.3V to (V + 0.3V)
IN
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.
PACKAGE THERMAL CHARACTERISTICS (Note 2)
TDFN
Junction-to-Ambient Thermal Resistance (B ) .......83.9NC/W
JA
Junction-to-Case Thermal Resistance (B ).............. 37NC/W
JC
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 = +2.2V to +36V, T = -40NC to +85NC, unless otherwise noted. Typical values are at V = +5.0V and T = +25NC.) (Note 3)
IN
A
IN
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
36
UNITS
V
Input Voltage Range
Input Supply Current
V
2.2
IN
I
V
V
< 5V
65
7
120
FA
IN
IN
MAX14586
6.8
14.5
6.73
14.35
7.2
rising
IN
MAX14590
MAX14586
MAX14590
15
15.5
7.13
15.35
IN Overvoltage Trip Level
V
V
IN_OVLO
6.93
14.85
V
falling
IN
IN Overvoltage Lockout
Hysteresis
V
1
%
V
IN_OVLO_HYS
OVLO Set Threshold
V
1.18
4
1.223
1.26
20
OVLO_THRESH
Adjustable OVLO Threshold
Range
V
External OVLO Select
Threshold
V
0.25
0.35
48
0.4
V
OVLO_SELECT
I
I
I
= 100mA, T = +25°C, V = 5V
81
OUT
A
IN
Switch On-Resistance
R
mI
ON
= 100mA, T = -40°C to +85°C
115
OUT
A
OVLO Clamp
= 10FA, V = 5V
3.6
V
CLAMP
IN
OUT Capacitor
C
1000
+100
FF
nA
NC
NC
OUT
OVLO Input Leakage Current
Thermal Shutdown
I
V
= 1.221V
-100
OVLO
OVLO_THRESH
+150
20
Thermal Shutdown Hysteresis
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*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 = +2.2V to +36V, T = -40NC to +85NC, unless otherwise noted. Typical values are at V = +5.0V and T = +25NC.) (Note 3)
IN
A
IN
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
TIMING CHARACTERISTICS (Figure 1)
Time from 2.2V < V < V
to
IN
IN_OVLO
Debounce Time
Soft-Start Time
t
15
15
ms
ms
INDBC
V
= 10% of V
OUT
IN
Soft-start time beginning from V
=
OUT
t
SS
10% of V to soft-start off
IN
2.2V < V < V
, R
= 100I,
IN
IN_OVLO LOAD
C
of V
= 100FF; V
from 10% to 90%
1.48
5.24
0.8
LOAD
OUT
IN
Switch Turn-On Time
t
ms
ON
2.2V < V < V
, R
= 100I,
IN
IN_OVLO LOAD
C
= 1mF; V
from 10% to 90%
LOAD
OUT
of V
IN
V
V
> V
to V
= 80% of
OUT
IN
OVLO_THRESH
Switch Turn-Off Time
t
; R
= 100I, V rising at
3.5
Fs
OFF
IN_OVLO LOAD
IN
2V/Fs
Note 3: All specifications are 100% production tested at T = +25NC, unless otherwise noted. Specifications are over -40NC to
A
+85NC and are guaranteed by design.
OVLO
2.2V
IN
t
V
t
ON
ON
IN_OVLO
80% V
IN_OVLO
90%
90%
SS
10%
10%
OUT
t
t
SS
t
t
INDBC
INDBC
t
OFF
NOTE: WAVEFORMS ARE NOT TO SCALE.
Figure 1. Timing Diagram
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*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 = +5.0V, C = 1FF, C
= 1FF, T = +25NC, unless otherwise noted.)
A
IN
IN
OUT
IN SUPPLY CURRENT vs. IN VOLTAGE
NORMALIZED R vs. TEMPERATURE
ON
400
350
300
250
200
150
100
50
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
I
= 100mA
OVLO = GND (MAX14586)
OUT
T = +85°C
A
V = 3.6V
IN
T = +25°C
A
V
= 5V
IN
T = -40°C
A
0
0
7
14
21
28
-40
-15
10
35
60
85
IN VOLTAGE (V)
TEMPERATURE (°C)
NORMALIZED OVLO THRESHOLD
vs. TEMPERATURE
NORMALIZED EXTERNAL OVLO SET
THRESHOLD vs. TEMPERATURE
1.05
1.04
1.03
1.02
1.01
1.00
0.99
0.98
0.97
0.96
0.95
1.05
1.04
1.03
1.02
1.01
1.00
0.99
0.98
0.97
0.96
0.95
V
= 6V
IN
-40
-15
10
35
60
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
NORMALIZED EXTERNAL OVLO SELECT
THRESHOLD vs. TEMPERATURE
NORMALIZED DEBOUNCE TIME
vs. TEMPERATURE
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
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
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
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MAX14586/MAX14590
High-Current Overvoltage Protectors
with Adjustable OVLO
Typical Operating Characteristics (continued)
(V = +5.0V, C = 1FF, C
= 1FF, T = +25NC, unless otherwise noted.)
A
IN
IN
OUT
POWER-UP RESPONSE
POWER-UP RESPONSE
= 0.5A, C = 1000µF)
(I
OUT
= 0.5A, C
OUT
= 100µF)
(I
OUT
OUT
MAX14586 toc07
MAX14586 toc08
V
IN
V
IN
5V/div
5V/div
0V
0V
0V
V
V
OUT
5V/div
OUT
5V/div
0V
I
I
OUT
OUT
500mA/div
500mA/div
0mA
0mA
10ms/div
10ms/div
OVERVOLTAGE FAULT RESPONSE
(I = 0.5A, C = 100µF)
OUT
OUT
MAX14586 toc09
V
IN
0V
5V/div
0V
V
OUT
5V/div
0mA
I
OUT
500mA/div
10µs/div
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MAX14586/MAX14590
High-Current Overvoltage Protectors
with Adjustable OVLO
Pin Configuration
TOP VIEW
OUT
8
OUT
7
GND
6
I.C.
5
MAX14586
MAX14590
*EP
+
1
2
3
4
IN
IN
OVLO
I.C.
TDFN
(2mm x 2mm)
*CONNECT EXPOSED PAD TO GND.
Pin Description
PIN
NAME
FUNCTION
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.
1, 2
IN
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.
3
OVLO
4, 5
6
I.C.
GND
OUT
Internally Connected. Connect I.C. to GND or leave I.C. unconnected.
Ground
7, 8
Output Voltage. Output of internal switch. Connect both OUT pins together for proper operation.
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.
—
EP
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MAX14586/MAX14590
High-Current Overvoltage Protectors
with Adjustable OVLO
Functional Diagram
IN
IN
OUT
OUT
CHARGE
PUMP
MAX14586
MAX14590
TEMPERATURE
FAULTS
LOGIC
V
BG
CONTROL
REFERENCE
SEL
OVLO
GND
Overvoltage Lockout (OVLO)
The MAX14586 has a 7V (typ) overvoltage threshold. The
MAX14590 has a 15V (typ) overvoltage threshold.
Detailed Description
The MAX14586/MAX14590 overvoltage protection devices
feature a low on-resistance (R ) internal FET and protect
ON
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).
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.
Applications Information
Device Operation
The devices have timing logic that controls the turn-on
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.
of the internal FET. If V < V
, the internal
IN
OVLO_THRESH
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 V rises above V
nected from IN.
, OUT is discon-
IN
OVLO_THRESH
Internal Switch
The devices incorporate an internal FET with a 48mI
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.
(typ) R . 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.
ON
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MAX14586/MAX14590
High-Current Overvoltage Protectors
with Adjustable OVLO
R
C
R
D
1MΩ
1.5kΩ
I
100%
90%
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
I
P
R
DISCHARGE
RESISTANCE
CHARGE-CURRENT-
LIMIT RESISTOR
AMPERES
HIGH-
VOLTAGE
DC
DEVICE
UNDER
TEST
36.8%
C
100pF
s
STORAGE
CAPACITOR
10%
0
SOURCE
TIME
t
0
t
RL
DL
CURRENT WAVEFORM
Figure 2a. Human Body ESD Test Model
Figure 2b. Human Body Current Waveform
External OVLO Adjustment Functionality
If OVLO is connected to ground, the internal OVLO com-
parator uses the internally set OVLO value.
Ordering Information/
Selector Guide
If an external resistor-divider is connected to OVLO and
TOP
MARK
OVLO
(V)
PART
PIN-PACKAGE
V
OVLO
exceeds the OVLO select voltage (V
)
OVLO_SELECT ,
the internal OVLO comparator reads the IN fraction fixed
by the external resistor-divider.
MAX14586ETA+T
MAX145ꢀ0ETA+T
8 TDFN-EP*
8 TDFN-EP*
BNJ
BNK
7
15
R1 = 1MI is a good starting value for minimum current
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.
consumption. Since V
, V
, and
IN_OVLO
OVLO_THRESH
R1 are known, R2 can be calculated from the following
formula:
R1
R2
*EP = Exposed pad.
V
= V
× 1+
IN_OVLO
OVLO_THRESH
Chip Information
This external resistor-divider is completely independent
from the internal resistor-divider.
PROCESS: BiCMOS
ESD Test Conditions
ESD performance depends on a number of conditions.
Package Information
The devices are specified for Q15kV (HBM) typical ESD
resistance on IN when IN is bypassed to ground with a
1FF ceramic capacitor.
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.
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 1.5kIresistor.
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
8 TDFN-EP
T822+2
21-0168
ꢀ0-0065
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8
MAX14586/MAX14590
High-Current Overvoltage Protectors
with Adjustable OVLO
Revision History
REVISION REVISION
PAGES
DESCRIPTION
CHANGED
NUMBER
DATE
0
3/11
Initial release
—
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
ꢀ
©
2011 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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