MAX20313/MAX20314/
MAX20315/MAX20316
500mA to 6A Adjustable
Current-Limit Switches
General Description
Benefits and Features
The MAX20313 and MAX20315 feature a continuous
current-limit mode during an overcurrent event. The
MAX20314 and MAX20316 feature a latchoff mode during
an overcurrent event. Additional safety features include
thermal shutdown protection to prevent overheating and
reverse current blocking to prevent current from being
driven back into the source.
●● Space Saving
• 12 Bump 0.4mm Pitch 1.68mm x 1.48mm WLP
The MAX20313–MAX20316 programmable current-limit
switches feature internal current-limiting to prevent damage
to host devices due to faulty load conditions. These
current-limit switches feature a low, 10mΩ (typ) onresistance and operate from a +2.5V to +5.5V input voltage
range. The current limit is adjustable from 500mA to 6A,
making these devices ideal for charging a large load
capacitor and for high-current load-switching applications.
The devices are available in a 12-bump (0.4mm pitch,
1.68mm x 1.48mm) wafer-level package (WLP) and operate
over the -40°C to +85°C extended temperature range.
Ordering Information appears at end of data sheet.
19-100072; Rev 0; 6/17
●● Reliable Protection
• Adjustable Current Limit (500mA to 6A)
• Accurate ±5% Overload Current Limit (2A to 6A)
• Current Monitoring
• Low RON 10mΩ (typ)
• Reverse Current Protection
• Short-Circuit Protection
• Thermal Shutdown Protection
Applications
●●
●●
●●
●●
●●
●●
RF Power Amplifier in Cell Phones
USB Ports
Data Modem Cards
Portable Media Players
UTCA/ATCA Platforms
SDXC Card Power Supply Protection
MAX20313/MAX20314/
MAX20315/MAX20316
500mA to 6A Adjustable
Current-Limit Switches
Absolute Maximum Ratings
(All voltages referenced to GND.)
IN, OUT, EN, EN, FLAG, SETI.................................-0.3V to +6V
Continuous Current Into Any Terminal (except IN, OUT)....20mA
OUT Short Circuit to GND.................................Internally Limited
Continuous Power Dissipation (TA = +70°C)
WLP (derate 13.73mW/°C above +70°C)................1098.4mW
Operating Temperature Range............................ -40°C to +85°C
Junction Temperature.......................................................+150°C
Storage Temperature Range............................. -65°C to +150°C
Soldering Temperature (reflow)........................................+260°C
Package Thermal Characteristics (Note 1)
WLP
Junction-to-Ambient Thermal Resistance (θJA)......72.82°C/W
Note 1: 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
(VIN = 2.5V to 5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VIN = 4.3V, CIN = 1µF, COUT = 1µF,
TA = +25°C) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
5.5
V
SUPPLY OPERATION
Operating Voltage
Undervoltage Lockout
Quiescent Current
VIN
2.5
VUVLO
IQ
1.45
V
IOUT = 0A, switch on, (supply current comes
from high voltage between IN and OUT)
250
525
µA
Latchoff Current
ILATCH
VIN = 4.3V, IOUT = 0A, after an
overcurrent fault (MAX20314,
MAX20316)
3.5
20
µA
Shutdown Forward Current
ISHDN
VEN = 0V, VEN = VIN, VIN = 5.5V,
VOUT = 0V
3.0
20
µA
Shutdown Reverse Current
IRSHDN
VEN = 0V, VEN = VOUT, VIN = 0V,
VOUT = 5.5V
3.0
20
µA
VIN = 4.3V, IOUT = 1A, IOUT < ILIM,
TA = +25ºC
10
19
mΩ
INTERNAL FET
Switch-on Resistance (Note 3)
Forward Current Limit (Note 3)
Current Limit Fold Back
RON
ILIM
ILIM_FB
RSETI = 675Ω, VIN = 4.3V
5700
6000
6300
RSETI = 2063Ω, VIN = 4.3V
1900
2000
2100
RSETI = 9019Ω, VIN = 4.3V
425
500
575
VIN = 4.3V, VOUT = 0V, ILIM = 1A
-10
mA
%
RSETI Coefficient
P
ILIM = 500mA to 6A
3329
RSETI Constant
C
ILIM = 500mA to 6A
12
mA
VIN = VEN = 4.3V, ILOAD = 80% ILIM
steps to 120% ILIM to flowing current
within 10% ILIM
60
µs
Load Transient Step Reaction
Time
www.maximintegrated.com
tSR
Maxim Integrated │ 2
MAX20313/MAX20314/
MAX20315/MAX20316
500mA to 6A Adjustable
Current-Limit Switches
Electrical Characteristics (continued)
(VIN = 2.5V to 5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VIN = 4.3V, CIN = 1µF, COUT = 1µF,
TA = +25°C) (Note 2)
PARAMETER
SYMBOL
Accurate Reverse Current
Blocking Trigger Threshold
VAREV_TH
Accurate Reverse Current
Blocking Release Threshold
VAREV_EX
Accurate Reverse Blocking
Debounce Time
tDB_ARIB
Fast Reverse Current Blocking
Threshold
VFREV_TH
CONDITIONS
MIN
TYP
MAX
UNITS
VOUT - VIN
1
8
25
mV
VOUT - VIN
0
7
mV
128
µs
(VOUT - VIN) changes from 0V to
-0.02V in 100ns, the time needed to
block reverse current
VOUT - VIN
Fast Reverse Blocking Response
Time
tFRIB
(VOUT - VIN) changes from 0V to -0.3V in
100ns, the time needed to block reverse
current
FLAG Assertion Drop Voltage
Threshold
VFA
Increase (VIN - VOUT) drop until FLAG
asserts, in current limit mode, VIN = 4.3V
40
65
110
3
70
120
mV
µs
185
mV
0.9
µA
EN, EN INPUT
EN, EN Input Leakage
ILEAK
EN, EN Input Logic-High Voltage
VIH
EN, EN Input Logic-Low Voltage
VIL
FLAG OUTPUT
EN, EN = IN or GND
-0.9
1.4
V
0.4
V
FLAG Output Logic-Low Voltage
ISINK = 1mA
0.4
V
FLAG Output Leakage Current
VIN = VFLAG = 5.5V, FLAG deasserted
0.9
µA
5
ms
TIMING CHARACTERISTICS
Turn-On Delay
tON
Time from EN/EN signal to VOUT = 90%
of VIN, VIN = 4.3V (Figure 1)
Turn-Off Time
tOFF
Time from EN/EN signal to VOUT = 10%
of VIN, VIN = 4.3V, CLOAD = 1000pF,
RLOAD = 860Ω (Figure 1)
50
µs
Current-Limit Reaction Time
tLIM
VIN = 4.3V, output high and then short
circuit applied, IOUT > 200% ILIM
3
µs
Blanking Time
tBLANK
VIN = 4.3V (Figure 2)
2.5
12
4
15
18
ms
THERMAL PROTECTION
Thermal Shutdown
150
°C
Thermal Shutdown Hysteresis
20
°C
Temperature Increase
Self-Limitation
130
°C
Note 2: All devices are 100% production tested at TA = +25°C. Specifications over the operating temperature range are guaranteed
by design.
Note 3: Guaranteed by design and device characterization.
www.maximintegrated.com
Maxim Integrated │ 3
MAX20313/MAX20314/
MAX20315/MAX20316
500mA to 6A Adjustable
Current-Limit Switches
EN
tON
90% VIN
VOUT
tOFF
10% VIN
Figure 1. Timing Diagram for Measuring Turn-On Time and Turn-Off Time
tBLANK
tBLANK
OUT
CURRENT LIMIT
LOAD CURRENT
THE DEVICE GOES TO
THERMAL-SHUTDOWN MODE
FLAG
Figure 2. Latchoff Fault Diagram
www.maximintegrated.com
Maxim Integrated │ 4
MAX20313/MAX20314/
MAX20315/MAX20316
500mA to 6A Adjustable
Current-Limit Switches
Typical Operating Characteristics
(VIN = 4.3V, CIN = 1µF, COUT = 1µF, TA = +25°C, unless otherwise noted.)
1.04
3.30
1.03
3.20
3.10
3.00
2.90
2.80
2.70
2.60
2.5
3.0
3.5
4.0
4.5
5.0
1.02
1.01
1.00
0.99
0.98
0.97
350
0.95
300
250
200
150
100
50
VEN = VIN
0
5.5
-40
-15
SUPPLY VOLTAGE (V)
10
35
60
85
1.5
2.0
2.5
TEMPERATURE (ºC)
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
toc04
350
QUIESCENT SUPPLY CURRENT
vs. SUPPLY VOLTAGE toc03
CURRENT LIMIT 1.5A
0.96
RSETI = 1.3kΩ
2.50
NORMALIZED CURRENT LIMIT
vs. TEMPERATURE
toc02
1.05
3.40
NORMALIZED CURRENT LIMIT
CURRENT LIMIT (A)
3.50
toc01
QUIESCENT SUPPLY CURRENT (µA)
CURRENT LIMIT
vs. SUPPLY VOLTAGE
3.5
14
VIN = 4.3V
200
150
100
50
VEN = VIN
-40
-15
10
35
60
10
8
6
VIN = 5V
4
VIN = 4.3V
2
0
-15
TEMPERATURE (ºC)
VOUT = 0V, VEN = 0V
10
10
35
60
6
4
2
0
8
6
VIN = 5.5V
4
TEMPERATURE (ºC)
www.maximintegrated.com
2
VIN = 2.3V
-15
60
85
10
35
60
85
NORMALIZED ON-RESISTANCE
vs. SUPPLY VOLTAGE toc09
1.5
VEN = VIN , ILOAD = 1A
NORMALIZED TO VIN = 4.3V
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0
35
4
1.4
VIN = 4.3V
10
VIN = 5.5V
6
-40
toc08
2
-15
8
85
VEN = VIN
MAX20314
10
8
-40
10
TEMPERATURE (ºC)
LATCHOFF CURRENT
vs. TEMPERATURE
12
VOUT = 5.5V, VIN = 1.7V
VEN = 0V
LATCHOFF CURRENT (µA)
SHUTDOWN REVERSE CURRENT (µA)
12
12
TEMPERATURE (ºC)
SHUTDOWN REVERSE CURRENT
vs. TEMPERATURE
toc07
5.5
5.0
0
-40
85
NORMALIZED ON-RESISTANCE
0
SHUTDOWN FORWARD CURRENT (µA)
SHUTDOWN SUPPLY CURRENT (µA)
QUIESCENT SUPPLY CURRENT (µA)
VIN = 5V
250
4.5
SHUTDOWN FORWARD CURRENT
vs. TEMPERATURE
toc06
VEN = 0V
300
4.0
SUPPLY VOLTAGE (V)
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
toc05
12
3.0
0.5
-40
-15
10
35
TEMPERATURE (ºC)
60
85
2.5
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
Maxim Integrated │ 5
MAX20313/MAX20314/
MAX20315/MAX20316
500mA to 6A Adjustable
Current-Limit Switches
Typical Operating Characteristics (continued)
(VIN = 4.3V, CIN = 1µF, COUT = 1µF, TA = +25°C, unless otherwise noted.)
NORMALIZED ON-RESISTANCE
vs. TEMPERATURE
toc10
1.4
OUTPUT CURRENT
vs. OUTPUT VOLTAGE
2.5
toc11
1200
1
0.9
0.8
RSETI = 2kΩ
1.5
RSETI = 2.4kΩ
1.0
0.5
IOUT = 1A
-15
10
35
60
0
0.02
TEMPERATURE (ºC)
SETI VOLTAGE
vs. OUT CURRENT
1400
toc13
SWITCH TURN-ON TIME (ms)
1000
VIN = 3V
VIN = 4.3V
800
600
VIN = 5.5V
400
200
0.06 0.08
VIN - VOUT (V)
0.1
0.12
1
2
3
4
5
6
0
toc14
2
3
4
VIN = 5V
3.4
3.3
3.2
57
56
VIN = 5V
55
54
VIN = 4.3V
53
52
51
50
-40
-15
10
35
60
85
-40
-15
10
35
85
CURRENT LIMIT RESPONSE
(SUDDEN SHORT)
toc17
VIN = VEN = 4.3V
CURRENT LIMIT 3A
MAX20313
MAX20313
IOUT
2A/div
IOUT
10A/div
VOUT
5V/div
VOUT
5V/div
VSETI
1V/div
VSETI
1V/div
5V/div
V/FLAG\
5V/div
www.maximintegrated.com
60
TEMPERATURE (ºC)
CURRENT LIMIT RESPONSE
(SUDDEN SHORT)
toc16
10ms/div
toc15
RLOAD = 10Ω
TEMPERATURE (ºC)
VIN = VEN = 4.3V
CURRENT LIMIT 3A
6
58
3.5
OUT CURRENT (A)
V/FLAG\
5
SWITCH TURN-OFF TIME
vs. TEMPERATURE
59
3.7
3.6
1
60
VIN = 4.3V
3.8
3.0
0
TA = +85ºC
400
OUT CURRENT (A)
3.1
0
600
0.14
RLOAD = 10Ω
3.9
1200
0.04
SWITCH TURN-ON TIME
vs. TEMPERATURE
4.0
RSETI = 614Ω
800
0
0.0
85
SWITCH TURN-OFF TIME (µs)
-40
TA = -40ºC
TA = +25ºC
200
0.7
0.6
SETI VOLTAGE (mV)
SETI VOLTAGE (mV)
OUTPUT CURRENT (A)
NORMALIZED ON-RESISTANCE
1000
2.0
1.1
toc12
RSETI = 614Ω
1.3
1.2
SETI VOLTAGE
vs. OUT CURRENT
10µs/div
Maxim Integrated │ 6
MAX20313/MAX20314/
MAX20315/MAX20316
500mA to 6A Adjustable
Current-Limit Switches
Typical Operating Characteristics (continued)
(VIN = 4.3V, CIN = 1µF, COUT = 1µF, TA = +25°C, unless otherwise noted.)
CURRENT LIMIT RESPONSE
(SLOW LOAD INCREASE) toc19
CURRENT LIMIT RESPONSE
(SLOW LOAD INCREASE) toc18
VIN = VEN = 4.3V
CURRENT LIMIT 3A
MAX20313
IOUT
2A/div
IOUT
VOUT
5V/div
VOUT
VSETI
V/FLAG\
MAX20313
2V/div
5V/div
V/FLAG\
5V/div
4ms/div
FLAG RESPONSE
(OVERLOAD CONDITION)
toc21
MAX20313
MAX20313
IOUT
VIN = VEN = 4.3V
CURRENT LIMIT 3A
SUDDEN SHORT
2A/div
VOUT
2A/div
VOUT
5V/div
VSETI
1V/div
VFLAG
5V/div
5V/div
VSETI
1V/div
V/FLAG\
5V/div
10ms/div
www.maximintegrated.com
5V/div
VSETI
CURRENT LIMIT RESPONSE
(FAST LOAD INCREASE) toc20
IOUT
2A/div
1V/div
1s/div
VIN = VEN = 4.3V
CURRENT LIMIT 4.1A
VIN = VEN = 4.3V
CURRENT LIMIT 3A
4ms/div
Maxim Integrated │ 7
MAX20313/MAX20314/
MAX20315/MAX20316
500mA to 6A Adjustable
Current-Limit Switches
Bump Configurations
TOP VIEW (BUMPS ON BOTTOM)
1
2
3
4
MAX20313/MAX20314
A
FLAG
SETI
GND
EN
IN
OUT
OUT
IN
IN
OUT
OUT
IN
1
2
3
4
B
C
MAX20315/MAX20316
A
SETI
GND
EN
IN
OUT
OUT
IN
IN
OUT
OUT
IN
FLAG
B
C
www.maximintegrated.com
Maxim Integrated │ 8
MAX20313/MAX20314/
MAX20315/MAX20316
500mA to 6A Adjustable
Current-Limit Switches
Bump Description
BUMP
MAX20313
MAX20314
MAX20315
MAX20316
NAME
FUNCTION
A1
A1
FLAG
Open-Drain Overcurrent Indicator Output. FLAG goes low when the overload
fault duration exceeds the blanking time, reverse current is detected, or thermal
shutdown mode is active.
A2
A2
SETI
Forward Current-Limit Adjust Input. Connect a resistor from SETI to GND to
program the overcurrent limit. If SETI is connected to GND, the device, as well as
the connected circuitry, cannot be protected from an overcurrent condition. Leaving
SETI unconnected forces the device to set an arbitrary small but uncontrolled
current limitation ( VFA
●●
The reverse-current protection has tripped
●●
The die temperature exceeds +150°C (typ)
Temperature Increase Self-Limitation
If the die temperature reaches +130°C, the device will
prevent itself from consuming more power than what can
be dissipated by the thermal resistance of the package.
The feature imposes a thermal control loop between
temperature and current limit level lowering the flowing
current through the part when junction temperature try to
rise above +130°C. Because of that, thermal design of
the board has an impact on loop behavior: the average
limited current is always reduced to the appropriate safe
level for any thermal design but the current limit may oscillate
as in auto-retry mode across the average level when the
thermal resistance of the board is high.
Thermal Shutdown
Thermal shutdown circuitry protects the devices from
overheating. The switch turns off and FLAG goes low
immediately when the junction temperature exceeds
+150°C (typ). The MAX20313/MAX20315 switches turn
on again after the device temperature drops by
approximately 20°C (typ).
Maxim Integrated │ 11
MAX20313/MAX20314/
MAX20315/MAX20316
500mA to 6A Adjustable
Current-Limit Switches
Applications Information
If the supply is not strong enough and the user does not
want to use a larger capacitor at the input, the following
circuitry can be used (Figure 3).
Setting the Current-Limit Threshold
and Current Monitoring
Connect a resistor between SETI and ground to program the
current limit threshold value for the devices. Table 2 shows
current limit thresholds for different resistor values at SETI.
Use the following formula to calculate the current limit:
1.224(V) × P
R SETI(Ω ) =
ILIM(A) − C(A)
Do not use a RSETI value smaller than 675Ω.
A current mirror is implemented with a current sense autozero operational amplifier. The mirrored current of the
IN-OUT FET is provided on the SETI pin. Therefore, the
voltage (VSETI) read on the SETI pin can be interpreted
as the current through the IN-OUT FET as below:
IIN−OUT
=
(A) I SETI (A) × P + =
C(A)
VSETI(V) × P
+ C(A)
R SETI(Ω )
Note: the current monitor feature does not provide valid
information if the device is performing safe current overlimitation (die temperature > 130°C (typ) or OUT voltage
< 1.8V, see Current Limit Fold Back section).
IN Bypass Capacitor
Connect a minimum 1µF capacitor from IN to GND to limit
the input voltage drop during momentary output shortcircuit conditions. If the power supply cannot support the
required short-circuit current, a larger capacitor should be
used to maintain the input voltage above 2.5V.
OUT Bypass Capacitor
For stable operation over the full temperature range and
over the full programmable current-limit range, use a 1µF
ceramic capacitor from OUT to ground.
Excessive output capacitance can cause a false overcurrent
condition due to decreased dV/dt across the capacitor.
Use the following formula to calculate the maximum
capacitive load (CMAX) on OUT:
C MAX (µF) =
ILIM(mA) × t BLANK(MIN) (ms)
VIN(V)
For example, for VIN = 5V, tBLANK(MIN) = 10ms, and
ILIM = 1000mA, CMAX equals 2000µF.
Layout and Thermal Dissipation
To optimize the switch response time to output shortcircuit conditions, it is very important to keep all traces
as short as possible to reduce the effect of undesirable
parasitic inductance. Place input and output capacitors as
close as possible to the device (should be no more than
5mm). IN and OUT must be connected with wide short
traces to the power bus. During normal operation, the
power dissipation is small and the package temperature
change is minimal. If the output is continuously shorted
to ground, the power dissipation for the MAX20313/
MAX20315 continuous current limit version can cause the
device to reach the thermal shutdown threshold.
Table 2. Current Limit Threshold vs.
Resistor Values
RSETI (Ω)
CURRENT LIMIT (A)
9019
0.5
4247
1.0
2777
1.5
2063
2.0
1641
2.5
1363
3.0
1165
3.5
1017
4.0
903
4.5
812
5.0
737
5.5
675
6.0
www.maximintegrated.com
OUT
IN
1µF
MAX20313
MAX20314
MAX20315
EN/EN MAX20316
FLAG
LOAD
RSETI
SETI
GND
~100Ω*
*IF VIN > 3V, A DIODE CAN BE USED IN PLACE OF THE RESISTOR.
Figure 3. Optional Protection for Weak Supply
Maxim Integrated │ 12
MAX20313/MAX20314/
MAX20315/MAX20316
500mA to 6A Adjustable
Current-Limit Switches
Typical Operating Circuit
MAX20313/MAX20314/
MAX20315/MAX20316
BIAS
VOLTAGE
IN
POWER
SUPPLY
1µF
OUT
LOAD
1µF
ADC
CHARGE
PUMP
SETI
VPULLUP
µP
CURRENT
REFERENCE
RSETI
10kΩ
CONTROL
LOGIC
FLAG
EN/EN*
GND
*EN: MAX20313, MAX20314
EN: MAX20315, MAX20316
Ordering Information/Selector Guide
OVERCURRENT
RESPONSE
EN POLARITY
TOP MARK
TEMP RANGE
PINPACKAGE
Continuous
Active-High
ADT
-40°C TO +85°C
12 WLP
MAX20314EWC+T*
Latchoff
Active-High
ADU
-40°C TO +85°C
12 WLP
MAX20315EWC+T*
Continuous
Active-Low
ADV
-40°C TO +85°C
12 WLP
MAX20316EWC+T*
Latchoff
Active-Low
ADW
-40°C TO +85°C
12 WLP
PART
MAX20313EWC+T
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
*Future product—Contact Maxim for availability.
Chip Information
PROCESS: BiCMOS
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.
12 WLP
W121K1+1
21-100118
Refer to Application Note 1891
www.maximintegrated.com
Maxim Integrated │ 13
MAX20313/MAX20314/
MAX20315/MAX20316
500mA to 6A Adjustable
Current-Limit Switches
Revision History
REVISION
NUMBER
REVISION
DATE
0
6/17
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.
© 2017 Maxim Integrated Products, Inc. │ 14
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