EVALUATION KIT AVAILABLE
MAX14714
Compact 6A Smart Power Path Selector
General Description
The MAX14714 compact 6A smart power path selector features a low, 11mΩ (typ) RON internal FET and provides the
system power from two separate power sources. The device
has two switches in SPDT configuration, with bidirectional
current-blocking capability when the switch is off.
The MAX14714 features two individual enable inputs to
control each power path. Each enable input controls the
corresponding path as an independent switch. However,
when both paths are enabled, the internal comparator
controls the path based on the voltage at input nodes.
The device also features an ultra-low supply current in the
operating or off states for longer battery-life.
The device is available in a 15-bump (1.2mm x 2.0mm)
wafer-level package (WLP) and operates over the -40ºC
to +85ºC extended temperature range.
Applications
●
●
●
●
Smartphones
Tablet PCs
e-Readers
Wearables
Features and Benefits
● Provides Robust Bidirectional Power Path
• Wide Operating Input Voltage: +1.6V to +5.5V
• 6A Continuous Current Capability
• Integrated Two 11mΩ (typ) MOSFET Switches
● Enables Simple Power Switch Design
• Individual Path Control
• Automatic Power Path Control
• Automatic Soft-Start
• Powered by IN1, IN2, or OUT
● Significantly Extends Battery Life
• Ultra-Low Quiescent Supply Current 2.5µA (typ)
• Fast Switchover
• Optimum Soft-Start Feature
● Compact Package Saves Board Space
• 15-Bump 1.2mm x 2.0mm WLP
Ordering Information appears at end of data sheet.
Typical Application Circuit
MAX14714
IN1
OUT
CHARGER
BATTERY 1
TA
IN2
BATTERY 2
AP
OR
PMIC
SYSTEM
LOAD
EN1
EN2
CONTROL
GND
19-7117; Rev 0; 9/14
MAX14714
Compact 6A Smart Power Path Selector
Absolute Maximum Ratings
All voltages referenced to GND
IN1, IN2....................................................................-0.3V to +6V
OUT..........................................................................-0.3V to +6V
EN1, EN2.................................................................-0.3V to +6V
Current into IN1, IN2
DC Operating (Note 1).........................................................6A
Pulse Rating (10ms).............................................................9A
Continuous Power Dissipation (TA = +70ºC)
WLP (derate 16.4mW/°C above +70°C).....................1312mW
Operating Temperature Range.............................-40ºC to +85°C
Junction Temperature.......................................................+150°C
Storage Temperature Range..............................-65ºC to +150°C
Soldering Temperature (reflow)........................................+260°C
Note 1: DC current is limited by thermal design of the system.
Package Thermal Characteristics (Note 2)
WLP
Junction-to-Ambient Thermal Resistance (θJA)...........52°C/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.maximintegrated.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 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.
Electrical Characteristics
(VIN1, VIN2 = 1.6V to 5.5V; TA = -40ºC to +85ºC, unless otherwise noted. Typical values are at VIN1, VIN2 = 4.3V; TA = +25ºC.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
5.5
V
5.75
µA
SUPPLY OPERATION
Operating Voltage
VIN1
VIN2
Shutdown Current
ISHDN
Quiescent Current
IIN1 IIN2
1.6
EN1 = high and EN2 = high
EN1 or EN2 = low, ILOAD = 0mA
2.5
7.5
µA
VIN_ = 4.3V, IOUT = 1A, TA = +25ºC
11
15
mΩ
INTERNAL FET
RON (IN1 or IN2 to OUT)
RON
Soft-Start Trigger Voltage
|VIN VOUT|
Soft-Start Time
0.95
tSS
1
5
V
10
ms
Soft-Start Output dV/dt Limit
ILIM_SS
CLOAD = 100µF
60
mV/µs
IN1 - IN2 Comparator Rising
Threshold
VTHR_IN
VIN1 = 4.3V, VIN2 = 4.0V, OUT is initially
connected to IN1, VIN2 rises until OUT
connects to IN2
500
mV
IN1 - IN2 Comparator Falling
Threshold
VVTHF_IN
VIN1 = 4.3V, VIN2 = 4.6V, OUT is initially
connected to IN2, VIN2 falls until OUT
connects to IN1
-500
mV
LOGIC INPUT (EN1, EN2)
EN1, EN2 Input Logic High
VIH
EN1, EN2 Input Logic Low
VIL
EN1, EN2 Input Leakage
Current
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ILEAK
1.4
VEN_ = 0V, 5.5V
-1
V
0.4
V
1
µA
Maxim Integrated │ 2
MAX14714
Compact 6A Smart Power Path Selector
Electrical Characteristics (continued)
(VIN1, VIN2 = 1.6V to 5.5V; TA = -40ºC to +85ºC, unless otherwise noted. Typical values are at VIN1, VIN2 = 4.3V; TA = +25ºC.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DYNAMIC PERFORMANCE (NOTE 4)
Single-Path Turn-On Time
tON
Time from EN_ low to OUT reaches 90% of
IN_ voltage, no load. (Figure 2)
6.5
µs
Single-Path Turn-Off Time
tOFF
VIN_ = 3V, VEN_ = 0V to 3V, RLOAD = 1kΩ.
Time from EN_ high to OUT reaches 10% of
its initial value. (Figure 2)
8
µs
Automatic Switchover
Enable Time
tASO
VIN1 = 3.8V, VIN2 = 4.3V
VEN1 = 0V, VEN2 = 3V to 0V to OUT reaches
90% of IN2. (Figure 2)
2
5
µs
Automatic Switchover
Break-Before-Make
tBBM
VIN1 = 3.7V, VIN2 = 3V to 4.3V
VEN1 = 0V, VEN2 = 0V,
OUT = 100mA and no load capacitor.
0.4
2
µs
Automatic Switchover
Debounce Time
tASDEB
VIN1 = 3.3V, VIN2 = 4.3V to 3V
VEN1 = 0V, VEN2 = 0V. (Figure 3)
0
2
µs
Note 3: All devices are 100% production tested at TA = +25ºC. Specifications over the operating temperature range are guaranteed
by design.
Note 4: All timing is measured using 20% and 80% levels unless otherwise specified.
Timing Diagrams
IN1
OUT
IN2
OUT
tASDEB
EN1
EN2
Figure 1. Automatic Switch Operation: IN2 Rise
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Maxim Integrated │ 3
MAX14714
Compact 6A Smart Power Path Selector
Timing Diagrams (continued)
IN2
IN1
tASO
tOFF
tON
OUT
EN1
EN2
Figure 2. Automatic Switch Operation: EN2 On (Time scale is exaggerated for easy recognition in the waveform)
IN2
OUT
IN1
OUT
tASDEB
EN1
EN2
Figure 3: Automatic Switch Operation: IN2 Sag (Time scale is exaggerated for easy recognition in the waveform)
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Maxim Integrated │ 4
MAX14714
Compact 6A Smart Power Path Selector
Typical Operating Characteristics
(CIN1,IN2 = 0.1µF, COUT = 100µF, TA = +25°C, unless otherwise noted.)
IN1 SHUTDOWN SUPPLY CURRENT (µA)
TA = +85ºC
3.5
TA = +25ºC
2.5
2.0
1.5
TA = -40ºC
1.0
0.5
0.0
V/EN1\ = 0V
0
2
3
4
IN1 SUPPLY VOLTAGE (V)
5
6
TA = -40ºC, VIN1=VOUT=UNCONNECTED
3.0
2.5
2.0
1.5
TA = +85ºC, VIN1=VOUT=5V
1.0
TA = -40ºC, VIN1=VOUT=5V
0.5
0.0
1
2
3
4
2.0
1.5
TA = +85ºC, VIN2=VOUT= 5V
1.0
TA = -40ºC, VIN2=VOUT= 5V
0.5
0
1
2
5
6
NORMALIZED IN1-OUT ON-RESISTANCE
NORMALIZED IN1-OUT ON-RESISTANCE
6
5
VIN1 = 1.6V
3
2
VIN1 = 3V
VIN1 = 3.3V
1
0
VIN1 = 4.2V
VIN1 = 5V
0
1
2
3
CURRENT (A)
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4
TA = +85ºC
3.5
3.0
TA = +25ºC
2.5
2.0
1.5
TA = -40ºC
1.0
0.0
6
5
toc05
TA = +85ºC
3.5
3.0
TA = +25ºC
2.5
2.0
1.5
TA = -40ºC
1.0
VIN1 = VIN2 = UNCONNECTED
V/EN1\ = V/EN2\ = 0V
0
V/EN2\ = 0V
0
1
1
2
3
4
5
OUT SUPPLY VOLTAGE (V)
6
1.5
VIN1 = 3.3V
VIN1 = 4.2V
1.0
VIN1 = 5V
0.5
0.0
ILOAD = 1A
NORMALIZED TO 4.2V, TA=+25ºC
-40
-15
10
35
TEMPERATURE (ºC)
60
6
TA = +85ºC, VIN1 = VIN2 = UNCONNECTED
4.0
TA = +25ºC, VIN1 = VIN2 = UNCONNECTED
3.5
TA = -40ºC, VIN1 = VIN2 = UNCONNECTED
3.0
2.5
2.0
1.5
1.0
TA = +85ºC, VIN1 = VIN2 = 5V
TA = -40ºC, VIN1 = VIN2 = 5V
0.5
TA = +25ºC, VIN1 = VIN2 = 5V
0
1
2
3
4
5
6
OUT SUPPLY VOLTAGE (V)
VIN1 = 1.6V
2.0
5
V/EN1\ = V/EN2\ = 1.8V
4.5
0.0
6
2
3
4
IN2 SUPPLY VOLTAGE (V)
OUT SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
toc06
5.0
NORMALIZED IN1-OUT ON-RESISTANCE
vs. TEMPERATURE
toc08
2.5
NORMALIZED TO 4.2V, 1A
4
5
4.0
0.0
NORMALIZED IN1-OUT ON-RESISTANCE
vs. CURRENT
toc07
7
4
OUT SUPPLY CURRENT
vs. OUT VOTAGE
IN2 SUPPLY VOLTAGE (V)
8
3
4.0
0.5
TA = +25ºC, VIN2=VOUT= 5V
0.5
TA = +25ºC, VIN1=VOUT=5V
0
2.5
4.5
TA = +25ºC, VIN1=VOUT=UNCONNECTED
3.5
3.0
5.0
TA = +85ºC, VIN1=VOUT=UNCONNECTED
4.0
TA = -40ºC, VIN2=VOUT=UNCONNECTED
IN1 SUPPLY VOLTAGE (V)
V/EN1\ = V/EN2\ = 1.8V
4.5
TA = +25ºC, VIN2=VOUT=UNCONNECTED
3.5
0.0
IN2 SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
toc04
5.0
IN2 SHUTDOWN SUPPLY CURRENT (µA)
1
TA = +85ºC, VIN2=VOUT=UNCONNECTED
4.0
toc03
4.5
OUT SHUTDOWN SUPPLY CURRENT (µA)
3.0
V/EN1\ = V/EN2\ = 1.8V
4.5
IN2 SUPPLY CURRENT
vs. SUPPLY VOLTAGE
5.0
85
NORMALIZED IN2-OUT ON-RESISTANCE
vs. CURRENT
toc09
8
NORMALIZED IN2-OUT ON-RESISTANCE
4.0
IN1 SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
toc02
5.0
OUT SUPPLY CURRENT (µA)
IN1 SUPPLY CURRENT (µA)
4.5
toc01
IN2 SUPPLY CURRENT (µA)
IN1 SUPPLY CURRENT
vs. SUPPLY VOLTAGE
5.0
NORMALIZED TO 4.2V, 1A
7
6
5
4
VIN2 = 1.6V
3
2
1
0
VIN2 = 3V
VIN2 = 3.3V
VIN2 = 5V
0
1
2
3
VIN2 = 4.2V
4
5
6
CURRENT (A)
Maxim Integrated │ 5
MAX14714
Compact 6A Smart Power Path Selector
Typical Operating Characteristics (continued)
(CIN1,IN2 = 0.1µF, COUT = 100µF, TA = +25°C, unless otherwise noted.)
NORMALIZED IN2-OUT ON-RESISTANCE
vs. TEMPERATURE
toc10
80
70
1.5
VIN2 = 4.2V
VIN2 = 3.3V
1.0
VIN2 = 5V
0.5
0.0
ILOAD = 1A
NORMALIZED TO 4.2V, TA=+25ºC
-40
-15
10
35
60
50
20
10
0
85
VIN1 = 2.7V
30
-40
-15
IN2-IN1 COMPARATOR RISING THRESHOLD
vs. TEMPERATURE
toc13
600
VIN1 = 4.3V
500
400
VIN1 = 3V
300
200
100
0
-40
-15
10
35
35
60
1.5
VIN1 = 2.7V
1.0
0.5
0.0
85
VIN1 = 4.2V
2.0
RLOAD = 10Ω
CLOAD = 0F
-40
TEMPERATURE (ºC)
IN2-IN1 COMPARATOR FALLING THRESHOLD (mV)
IN2-IN1 COMPARATOR RISING THRESHOLD (mV)
TEMPERATURE (ºC)
10
60
85
0
toc12
2.5
VIN1 = 4.2V
60
40
SWITCH TURN-OFF TIME
vs. TEMPERATURE
3.0
SWITCH TURN-OFF TIME (µs)
VIN2 = 1.6V
2.0
SOFT- START TURN-ON TIME (µs)
NORMALIZED IN2-OUT ON-RESISTANCE
2.5
SOFT-START TURN-ON TIME
vs. TEMPERATURE
toc11
-15
10
35
60
85
TEMPERATURE (ºC)
IN2-IN1 COMPARATOR FALLING THRESHOLD
vs. TEMPERATURE
toc14
SOFT-START TURN-ON WAVEFORM
toc15
2V/div
V/EN1\
-100
4.3V
VIN1
-200
-300
VIN1 = 3V
5V/div
IIN1
5A/div
VOUT
5V/div
-400
VIN1 = 4.3V
-500
-600
-40
TEMPERATURE (ºC)
-15
10
35
60
85
20µs/div
TEMPERATURE (ºC)
SWITCH-OFF WAVEFORM
SWITCHOVER WAVEFORM
toc16
SWITCHOVER WAVEFORM
toc17
toc18
2V/div
V/EN1\
4V
VIN1
4.3V
5V/div
VIN1
1A/div
5V/div
RLOAD = 10Ω
CLOAD = 0F
2µs/div
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5V/div
5V/div
4.6V
VIN2
5V/div
4.6V
4.6V
200mV/div
VOUT
VOUT
4V
VIN1
4.6V
VIN2
IIN1
5V/div
4V
RLOAD = 10Ω
20µs/div
200mV/div
VOUT
4V
RRLOAD
= 10Ω
LOAD = 10Ω
20ms/div
Maxim Integrated │ 6
MAX14714
Compact 6A Smart Power Path Selector
Typical Operating Characteristics (continued)
(CIN1,IN2 = 0.1µF, COUT = 100µF, TA = +25°C, unless otherwise noted.)
LATCHOFF WAVEFORM
SIMULTANEOUS STARTUP
toc19
4V
toc20
VIN1
5V/div
VIN2
5V/div
IIN1
5A/div
IIN2
5A/div
VOUT
RRLOAD
= 10Ω 5V/div
LOAD = 10Ω
5V/div
VIN1
4.6V
VIN2
5V/div
VOUT
2V/div
RLOAD = 10Ω
40µs/div
20ms/div
IN1 AND IN2 FROM SAME SOURCE
Bump Configuration
TOP VIEW (BUMPS ON BOTTOM)
1
2
3
4
5
MAX14714
+
A
EN1
OUT
OUT
OUT
EN2
IN1
IN1
OUT
IN2
IN2
IN1
IN1
GND
IN2
IN2
B
C
Bump Description
BUMP
NAME
A1
EN1
Active-Low Enable Input for IN1, Switch 1.
A2, A3, A4, B3
OUT
Common Switch Output.
A5
EN2
Active-Low Enable Input for IN2, Switch 2.
B1, B2, C1, C2
IN1
Power Input 1.
B4, B5, C4, C5
IN2
Power Input 2.
C3
GND
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FUNCTION
Ground.
Maxim Integrated │ 7
MAX14714
Detailed Description
The MAX14714 compact 6A smart power path selector
device features a low, 11mΩ (typ) RON internal FET and
provides the system power from two separate power
sources. The device has two switches in SPDT configuration, with a bidirectional current-blocking capability when
the switch is turned off.
The MAX14714 features two individual enable inputs to
control each power path. Each enable input controls the
corresponding path as an independent switch. However,
when both paths are enabled, the internal comparator
controls the path based on voltage at input nodes to autoselect the higher voltage input.
Enable Inputs
EN1 and EN2 active-low enable inputs control the two
switches position. (Table 1)
Soft-Start
When a switch is enabled, and if the voltage difference
between IN_ and OUT is greater than 0.95V (typ), the
device performs soft-start for 5ms (typ) to prevent high
inrush current. During soft-start, the output dV/dt is limited
to 60mV/µs (typ). The soft-start feature is bidirectional for
either IN_ or OUT supply.
Auto-Selection
When both EN1 and EN2 are low, the device is in autoselection mode and the switch with higher voltage on
input is turned on. A difference of VTHR_IN (500mV, typ)
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Compact 6A Smart Power Path Selector
Table 1. Enable Control
EN1
EN2
SWITCH STATUS
0
0
Auto Selection: switch 1 or switch 2 on*
1
0
Switch 2 on, switch 1 off
0
1
Switch 1 on, switch 2 off
1
1
Switch 1 and switch 2 both off
*When voltages on IN1 and IN2 are about the same, the
device selects IN2 as the supply source. Please refer to AutoSelection for details.
between IN1 and IN2 is required in order to switch to the
higher supply voltage.
Once the device selects the switch, the switch is on
as long as the other input is not higher by VTHR_IN.
If frequent jittering is expected from the power source,
manual selection is recommended once the power source
is stabilized. If auto-selection latchoff is preferred, please
contact the factory for a latchoff option.
In case voltages on IN1 and IN2 are about the same, and
EN1 and EN2 both go from high to low, the device selects
IN2 as the supply source. After this initial choice, normal
auto-selection resumes.
Bidirectional Current-Blocking
The bidirectional FET switch prevents current flowing
from either side when the switch is off.
Maxim Integrated │ 8
MAX14714
Compact 6A Smart Power Path Selector
Ordering Information
PART
ENABLE POLARITY
TEMP RANGE
BUMP-PACKAGE
MAX14714EWL+
ACTIVE-LOW
-40ºC to +85ºC
15 WLP
+Denotes a lead(Pb)-free/RoHS-compliant package.
Chip Information
PROCESS: BiCMOS
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Package Information
For the latest package outline information and land patterns
(footprints), go to www.maximintegrated.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.
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
15 WLP
W151E2+1
21-1031
Refer to
Application
Note 1891
Maxim Integrated │ 9
MAX14714
Compact 6A Smart Power Path Selector
Revision History
REVISION
NUMBER
REVISION
DATE
0
9/14
DESCRIPTION
Initial release
PAGES
CHANGED
—
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
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