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MAX14670EWL

Bidirectional Current-Blocking, High-Input Overvoltage Protector with Adjustable OVLO

厂商名称:Maxim(美信半导体)

厂商官网:https://www.maximintegrated.com/en.html

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EVALUATION KIT AVAILABLE
MAX14670–MAX14673
Bidirectional Current-Blocking, High-Input
Overvoltage Protector
with Adjustable OVLO
Benefits and Features
General Description
The MAX14670–MAX14673 provide protection to valu-
able consumer circuits against positive voltage faults up
to +28V
DC
. An internal clamp also protects the devices
from surges up to +80V. The device is able to disconnect
the system from its output terminal when wrong input
conditions are detected.
The MAX14670–MAX14673 overvoltage protection devic-
es feature low 65mΩ (typ), WLP package on-resistance
(R
ON
) internal FETs, effectively minimizing the voltage
drop across the device. 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
5V and 22V. The devices automatically choose the accu-
rate internal trip thresholds when the overvoltage lockout
input (OVLO) is set lower than the external OVLO select
voltage. The internal OVLO are preset to typical 6.8V
(MAX14670), 15.5V (MAX14671), 5.825V (MAX14672),
or 22V (MAX14673).
The MAX14670–MAX14673 feature reverse bias blocking
capability. Unlike other overvoltage protectors, when the
MAX14670–MAX14673 are disabled, the voltage applied
to OUT does not feed back into IN. These devices also
feature an OTG enable pin that allows OUT voltage to
supply IN. The MAX14670–MAX14673 also have thermal
shutdown protection against over load conditions.
The MAX14670–MAX14673 are specified over the extend-
ed -40°C to +85°C temperature range. The MAX14670/
MAX14671 are available in a 15-bump WLP package and
the MAX14672/MAX14673 are available in a 10-pin TDFN
package.
Ordering Information/Selector Guide
and
Typical Operating
Circuit
appear at end of data sheet.
For related parts and recommended products to use with this part, refer
to
www.maximintegrated.com/MAX14670.related.
● Protect High-Power Portable Devices
Wide Operating Input Voltage Protection from
+3V to +28V
• +80V Surge Capability
4.5A Continuous Current Capability (WLP Package)
Integrated 65mΩ (typ) n-Channel MOSFET Switch
(WLP Package)
● Flexible Overvoltage Protection Design
Wide +5V to +22VAdjustable OVLO Threshold
Range
ACOK
and ACOK Indicate Input is in Range
OTG Enable Allows OUT to Supply IN
Preset Accurate Internal OVLO Thresholds:
6.8V ±3% (MAX14670)
15.5V ±3% (MAX14671)
5.825V ±3% (MAX14672)
22V ±3% (MAX14673)
● Additional Protection Features Increase System
Reliability
OUT-IN Reverse Bias Blocking Capability
Soft-Start to Minimize Inrush Current
Internal 15ms Startup Debounce
Thermal Shutdown Protection
● Space Saving
15-Bump, 1.6mm x 2.1mm, WLP Package
10-Pin, 3mm x 3mm, TDFN Package
Applications
Tablets
Smart Phones
E-Readers
PC Notebooks
Charging USB Hosts
19-6727; Rev 0; 6/13
MAX14670–MAX14673
Bidirectional Current-Blocking, High-Input
Overvoltage Protector
with Adjustable OVLO
Continuous Power Dissipation (T
A
= +70°C)
WLP (derate 16.4mW/°C above +70°C)
....................1312mW
TDFN (derate 24.4mW/°C above +70°C)
..................1951mW
Operating Temperature Range
........................... -40°C to +85°C
Storage Temperature Range
............................ -65°C to +150°C
Soldering Temperature (reflow)
.......................................+260°C
Absolute Maximum Ratings
(All voltages referenced to GND.)
IN (Note 1)
.............................................................-0.3V to +29V
OUT .......................................................................-0.3V to +26V
IN - OUT
.................................................................-26V to +29V
OTG_EN, ACOK,
ACOK
.........................................-0.3V to +6V
OVLO.....................................................................-0.3V
to +26V
Continuous Current into IN, OUT
WLP (Note 2)
..................................................................±4.5A
TDFN
..............................................................................±3.2A
Note 1:
Survives burst pulses up to 80V with 2Ω series resistance and hot plug events. Above the input clamp voltage, the IN must
be a surge in nature with a limited energy.
Note 2:
Limited by the PCB thermal design.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation 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 3)
WLP
Junction-to-Ambient Thermal Resistance (θ
JA
)
..........52°C/W
TDFN
Junction-to-Ambient Thermal Resistance (θ
JA
)
..........41°C/W
Junction-to-Case Thermal Resistance (θ
JC
)
.................9°C/W
Note 3:
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.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
(V
IN
= +3V to +28V, V
OUT
= +3V to +24V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
IN
= +5V, T
A
= +25°C.)
(Note 4)
PARAMETER
Input Startup Voltage
Input Sustaining Voltage
Input Clamp Voltage
Input Supply Current
Output Startup Voltage
Output Sustaining Voltage
Output Supply Current
Output Shutdown Current
IN Leakage Voltage
IN Discharge Current
SYMBOL
V
INBT
V
INBU
I
OUT
= 0A
V
OVLO
= 0V, V
IN
= 5V, ACOK is
unconnected, I
OUT
= 0mA
I
IN
= 0A
V
OVLO
= 0V, V
OUT
= 5V, I
IN
= 0mA,
V
OTG_EN
= 1.8V
V
OVLO
= 3V, V
OUT
= 5V, V
IN
= 0V,
V
OTG_EN
= 0V
V
OUT
= 21V, IN unconnected,
V
OTG_EN
= 0V
V
IN
= V
OUT
= 5V, IN discharge current after
an OTG_EN transition from high to low
V
IN_CLAMP
I
IN
= 10mA, T
A
= +25°C
I
IN
V
OUTBT
V
OUTBU
I
OUT
CONDITIONS
MIN
TYP
2.17
1.5
33.7
100
2.15
1.5
83
6
0.001
100
190
3
2.3
170
12
0.1
150
MAX
3
2.3
UNITS
V
V
V
µA
V
V
µA
µA
V
mA
www.maximintegrated.com
Maxim Integrated │
2
MAX14670–MAX14673
Bidirectional Current-Blocking, High-Input
Overvoltage Protector
with Adjustable OVLO
Electrical Characteristics (continued)
(V
IN
= +3V to +28V, V
OUT
= +3V to +24V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
IN
= +5V, T
A
= +25°C.)
(Note 4)
PARAMETER
OVP (IN TO OUT)
On-Resistance (IN to OUT)
R
ON
V
IN
= 5V,
I
OUT
= 100mA
MAX14670
Internal Overvoltage Trip Level
V
IN_OVLO
MAX14671
MAX14672
OVLO Set Threshold
Adjustable OVLO Threshold
Range
External OVLO Select Threshold
ACOK Output High Voltage
ACOK Leakage Current
ACOK
Output Low Voltage
ACOK
Leakage Current
OTG_EN Input Logic High
OTG_EN Input Logic Low
OTG_EN Input Leakage Current
V
IH
V
IL
I
IN
0V ≤ V
IN
≤ V
IL
and V
IH
≤ V
IN
≤ V
CC
,
V
CC
= 5.5V
V
IN
= 5V to charge pump on (V
OUT
= 10%
of V
IN
), R
LOAD
= 100Ω, C
LOAD
= 10µF
V
IN
= 5V to V
OUT
= 90% of V
IN
,
R
LOAD
= 100Ω, C
LOAD
= 10µF
V
IN
= 5V, R
LOAD
= 100Ω, C
LOAD
= 10µF,
V
OUT
= 20% of V
IN
to 80% of V
IN
From V
IN
> V
OVLO
to V
OUT
= 80% of V
IN
,
R
LOAD
= 100Ω
Time from OTG_EN high to V
IN
= 80% of
V
OUT
, V
OUT
= 5V, C
IN
= 10µF
V
IN
= V
OUT
= 5V, current pulse duration
after an OTG_EN transition from high to low
-1
V
OL
V
OVLO_TH
V
OVLO_EXT
V
OVLO_SEL
V
ACOK
I
SOURCE
≤ 100µA, V
IN
> 3V
Pull down to ground, V
OUT
= 5V,
OTG_EN = high, ACOK deasserted
V
IO
= 3.3V, I
SINK
= 1mA
V
IO
= 3.3V,
ACOK
deasserted
1.6
0.4
+1
WLP, T
A
= +25°C
TDFN, T
A
= +25°C
V
IN
rising
V
IN
falling
V
IN
rising
V
IN
falling
V
IN
rising
V
IN
falling
6.6
6.5
15.0
14.5
5.65
5.55
1.18
5
0.2
1.6
0.25
1.8
1.221
1.26
22
0.3
2.0
1
0.4
1
V
V
V
V
µA
V
µA
V
V
µA
5.825
6.0
15.5
16.0
V
65
85
6.8
87
110
7.0
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DIGITAL SIGNALS (ACOK,
ACOK,
OTG_EN)
TIMING CHARACTERISTICS (Figure 1)
IN Debounce Time
IN/OUT Soft-Start Time
IN OVP Turn-On Time During
Soft-Start
IN OVP Turn-Off Response Time
OTG Turn-On Time
In-Discharge Pulse Duration
t
DEB
t
SS
t
ON
t
OFF
t
OTG_ON
20
25
1.5
1
1.4
1.1
ms
ms
ms
µs
ms
ms
www.maximintegrated.com
Maxim Integrated │
3
MAX14670–MAX14673
Bidirectional Current-Blocking, High-Input
Overvoltage Protector
with Adjustable OVLO
Electrical Characteristics (continued)
(V
IN
= +3V to +28V, V
OUT
= +3V to +24V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
IN
= +5V, T
A
= +25°C.)
(Note 4)
PARAMETER
THERMAL PROTECTION
Thermal Shutdown
Thermal Hysteresis
ESD PROTECTION
Human Body Model
IEC 61000-4-2 Contact
Discharge
IEC 61000-4-2 Air-Gap Discharge
IN pin
IN pin
IN pin
±15
±8
±8
kV
kV
kV
T
SHDN
T
HYST
150
20
°C
°C
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Note 4:
All devices are 100% production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed by
design and not production tested.
t
OFF
OVLO
IN
2.2V
t
DEB
t
DEB
OUT
t
ON
t
SS
t
OFF
t
DEB
t
ON
THERMAL
SHUTDOWN
t
OTG_ON
V
OVLO_TH
OVLO
t
DEB
ACOK
V
ACOK
ACOK
DEASSERT
ACOK, ACOK
GOOD SIGNAL
OTG_EN
Figure 1. Timing Diagram
www.maximintegrated.com
Maxim Integrated │
4
MAX14670–MAX14673
Bidirectional Current-Blocking, High-Input
Overvoltage Protector
with Adjustable OVLO
Typical Operating Characteristics
(V
IN
= +5V, OVLO = GND, C
IN
= 0.1µF, C
OUT
= 1µF, T
A
= +25°C, unless otherwise noted.)
MAX14670 toc02
OVLO LEAKAGE CURRENT (nA)
350
IN SUPPLY CURRENT (µA)
300
250
200
150
100
50
0
0
T
A
= +85ºC
MAX14670
MAX14670 toc01
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
V
IN
= 0V
0
2
4
V
OVLO
(V)
6
1.3
NORMALIZED R
ON
1.2
1.1
1.0
0.9
0.8
0.7
V
IN
= +3.6V
V
IN
= +5V
T
A
= +25ºC
T
A
= -40ºC
10
20
30
8
0.6
I
OUT
= 1A
NORMALIZED TO +25ºC
-40
-15
10
35
60
85
TEMPERATURE (ºC)
IN VOLTAGE (V)
OUTPUT SUPPLY CURRENT (µA)
1.8
1.6
NORMALIZED R
ON
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
1
2
NORMALIZED TO 0.1A
LOAD CURRENT
3
4
MAX14670 toc04
250
T
A
= +85ºC
200
150
100
50
0
OTG_EN = HIGH
0
5
10
15
20
T
A
= +25ºC
T
A
= -40ºC
5
25
OUTPUT CURRENT (A)
OUTPUT VOLTAGE (V)
NORMALIZED INTERNAL OVLO THRESHOLD
MAX14670 toc06
OUT-IN LEAKAGE CURRENT (µA)
9
8
7
6
5
4
3
2
1
0
0
2
4
V
IN
= 0V
1.04
1.03
1.02
1.01
1.00
0.99
0.98
0.97
0.96
0.95
-40
-15
10
NORMALIZED TO +25ºC
35
60
6
85
OUT VOLTAGE (V)
TEMPERATURE (ºC)
www.maximintegrated.com
Maxim Integrated │
5
MAX14670 toc07
10
OUT-IN LEAKAGE CURRENT
vs. OUT VOLTAGE
1.05
NORMALIZED INTERNAL OVLO
THRESHOLD vs. TEMPERATURE
MAX14670 toc05
2.0
NORMALIZED ON-RESISTANCE
vs. OUTPUT CURRENT
300
OUTPUT SUPPLY CURRENT
vs. OUTPUT VOLTAGE
MAX14670 toc03
400
IN SUPPLY CURRENT
vs. IN VOLTAGE
1.0
OVLO LEAKAGE CURRENT
vs. OVLO VOLTAGE
1.4
NORMALIZED ON-RESISTANCE
vs. TEMPERATURE
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参数对比
与MAX14670EWL相近的元器件有:MAX14670、MAX14671EWL、MAX14672、MAX14672ETB、MAX14673、MAX14673ETB。描述及对比如下:
型号 MAX14670EWL MAX14670 MAX14671EWL MAX14672 MAX14672ETB MAX14673 MAX14673ETB
描述 Bidirectional Current-Blocking, High-Input Overvoltage Protector with Adjustable OVLO Bidirectional Current-Blocking, High-Input Overvoltage Protector with Adjustable OVLO Bidirectional Current-Blocking, High-Input Overvoltage Protector with Adjustable OVLO Bidirectional Current-Blocking, High-Input Overvoltage Protector with Adjustable OVLO Bidirectional Current-Blocking, High-Input Overvoltage Protector with Adjustable OVLO Bidirectional Current-Blocking, High-Input Overvoltage Protector with Adjustable OVLO Bidirectional Current-Blocking, High-Input Overvoltage Protector with Adjustable OVLO
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