DATASHEET
ISL6185
FN6937
Rev 3.00
March 8, 2012
Dual USB Port Power Supply Controller
The ISL6185 USB power controller family provides fully
independent overcurrent (OC) fault protection for two or more
USB ports.
Features
This product family consists of sixteen individual functional
product variants and three package options. It is operation
rated for a nominal +2.5V to +5V range and is specified over
the full commercial and industrial temperature ranges.
• 71m Integrated Power P-channel MOSFET Switches
Each ISL6185 type incorporates in a single package two
71m P-channel MOSFET power switches for power control.
Each features internal current monitoring, accurate current
limiting, and current limited delay to turn-off, for system
supply protection along with control and communication I/O.
• 2.5V to 5V Operating Range
• Continuous Current Options for 0.6A, 1.1A, 1.5A and 1.8A
• Thermally Insensitive 12ms of Current Limiting Prior to
Turn-Off
• Output Discharges with Reverse Current Blocking When
Disabled
• Latch-off or Auto Restart Options
• 1µA Off-State Supply Current
The ISL6185 family offers product variants with specified
continuous output current levels of 0.6A, 1.1A, 1.5A or 1.8A;
enable active high or low inputs; and latch off or automatic retry
after overcurrent turn-off, making these devices well suited for
many low-power applications.
• Enable Polarity Options
This family of ICs is offered in an industry-standard SOIC
pinout and also in the 70% smaller 3x3 DFN packages
providing similar or enhanced performance in the smallest
possible package.
Applications
• Industry-standard Pin for Pin SOIC, and Smaller DFN
Packages Available
• UL Recognized, File Number: E333469
• USB 1, 2, 3 Port Power Management
• Low Power (18W) Electronic Circuit Limiting and Breaker
D+
D-
C
O
N
T
R
O
L
L
E
R
ENABLE_1
USB
PORT 1
OUT_1
VBUS
FAULT_1
+5V
VIN
GND
ISL6185
FAULT_2
ENABLE_2
OUT_2
D+
DUSB PORT POWER
FIGURE 1. TYPICAL APPLICATION
FN6937 Rev 3.00
March 8, 2012
VBUS
USB
PORT_2
1.3
NORMALIZED rDS(ON)
U
S
B
1.2
1.1
1.0
0.9
0.8
0.7
-40
-25
0
25
45
75
TEMPERATURE (°C)
85
115
FIGURE 2. NORMALIZED rDS(ON) TEMPERATURE
CHARACTERISTIC CURVE
Page 1 of 20
ISL6185
Simplified Block Diagram
CHANNEL 1 LIKE CHANNEL 2
GND
FAULT_1
+
-V
comp
VIN
OUT_1
POR
CURRENT AND TEMP.
MONITORING, GATE,
DELAY & OUTPUT CONTROL
LOGIC
EN_1
EN_2
OUT_2
FAULT_2
Ordering Information
PART
NUMBER
(Notes 1, 2, 3)
PART MARKING
EN/EN
INPUT
VIN = 5V
MAXIMUM
CONTINUOUS IOUT
(A)
LATCH/AUTO
RETRY
TEMP.
RANGE (°C)
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL61851ACBZ
61851A CBZ
EN
0.6
LATCH
0 to +70
8 Lead SOIC
M8.15
ISL61851BCBZ
61851B CBZ
EN
0.6
RETRY
0 to +70
8 Lead SOIC
M8.15
ISL61851CCBZ
61851C CBZ
EN
1.1
LATCH
0 to +70
8 Lead SOIC
M8.15
ISL61851DCBZ
61851D CBZ
EN
1.1
RETRY
0 to +70
8 Lead SOIC
M8.15
ISL61851ECBZ
61851E CBZ
EN
0.6
LATCH
0 to +70
8 Lead SOIC
M8.15
ISL61851FCBZ
61851F CBZ
EN
0.6
RETRY
0 to +70
8 Lead SOIC
M8.15
ISL61851GCBZ
61851G CBZ
EN
1.1
LATCH
0 to +70
8 Lead SOIC
M8.15
ISL61851HCBZ
61851H CBZ
EN
1.1
RETRY
0 to +70
8 Lead SOIC
M8.15
ISL61851ICBZ
61851I CBZ
EN
1.5
LATCH
0 to +70
8 Lead SOIC
M8.15
ISL61851JCBZ
61851J CBZ
EN
1.5
RETRY
0 to +70
8 Lead SOIC
M8.15
ISL61851KCBZ
61851K CBZ
EN
1.5
LATCH
0 to +70
8 Lead SOIC
M8.15
ISL61851LCBZ
61851L CBZ
EN
1.5
RETRY
0 to +70
8 Lead SOIC
M8.15
ISL61852ACRZ
52AC
EN
0.6
LATCH
0 to +70
8 Lead DFN
L8.3x3J
ISL61852BCRZ
52BC
EN
0.6
RETRY
0 to +70
8 Lead DFN
L8.3x3J
ISL61852CCRZ
52CC
EN
1.1
LATCH
0 to +70
8 Lead DFN
L8.3x3J
ISL61852DCRZ
52DC
EN
1.1
RETRY
0 to +70
8 Lead DFN
L8.3x3J
ISL61852ECRZ
52EC
EN
0.6
LATCH
0 to +70
8 Lead DFN
L8.3x3J
FN6937 Rev 3.00
March 8, 2012
Page 2 of 20
ISL6185
Ordering Information (Continued)
PART
NUMBER
(Notes 1, 2, 3)
ISL61852FCRZ
PART MARKING
52FC
EN/EN
INPUT
VIN = 5V
MAXIMUM
CONTINUOUS IOUT
(A)
LATCH/AUTO
RETRY
TEMP.
RANGE (°C)
EN
0.6
RETRY
0 to +70
8 Lead DFN
L8.3x3J
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL61852GCRZ
52GC
EN
1.1
LATCH
0 to +70
8 Lead DFN
L8.3x3J
ISL61852HCRZ
52HC
EN
1.1
RETRY
0 to +70
8 Lead DFN
L8.3x3J
ISL61852ICRZ
52IC
EN
1.5
LATCH
0 to +70
8 Lead DFN
L8.3x3J
ISL61852JCRZ
52JC
EN
1.5
RETRY
0 to +70
8 Lead DFN
L8.3x3J
ISL61852KCRZ
52KC
EN
1.5
LATCH
0 to +70
8 Lead DFN
L8.3x3J
ISL61852LCRZ
52LC
EN
1.5
RETRY
0 to +70
8 Lead DFN
L8.3x3J
ISL61853ACRZ
53AC
EN
0.6
LATCH
0 to +70
10 Lead DFN
L10.3x3
ISL61853BCRZ
53BC
EN
0.6
RETRY
0 to +70
10 Lead DFN
L10.3x3
ISL61853CCRZ
53CC
EN
1.1
LATCH
0 to +70
10 Lead DFN
L10.3x3
ISL61853DCRZ
53DC
EN
1.1
RETRY
0 to +70
10 Lead DFN
L10.3x3
ISL61853ECRZ
53EC
EN
0.6
LATCH
0 to +70
10 Lead DFN
L10.3x3
ISL61853FCRZ
53FC
EN
0.6
RETRY
0 to +70
10 Lead DFN
L10.3x3
ISL61853GCRZ
53GC
EN
1.1
LATCH
0 to +70
10 Lead DFN
L10.3x3
ISL61853HCRZ
53HC
EN
1.1
RETRY
0 to +70
10 Lead DFN
L10.3x3
ISL61853ICRZ
53IC
EN
1.5
LATCH
0 to +70
10 Lead DFN
L10.3x3
ISL61853JCRZ
53JC
EN
1.5
RETRY
0 to +70
10 Lead DFN
L10.3x3
ISL61853KCRZ
53KC
EN
1.5
LATCH
0 to +70
10 Lead DFN
L10.3x3
ISL61853LCRZ
53LC
EN
1.5
RETRY
0 to +70
10 Lead DFN
L10.3x3
ISL61853MCRZ
53MC
EN
1.8
LATCH
0 to +70
10 Lead DFN
L10.3x3
ISL61853NCRZ
53NC
EN
1.8
RETRY
0 to +70
10 Lead DFN
L10.3x3
ISL61853OCRZ
53OC
EN
1.8
LATCH
0 to +70
10 Lead DFN
L10.3x3
ISL61853PCRZ
53PC
EN
1.8
RETRY
0 to +70
10 Lead DFN
L10.3x3
ISL61851AIBZ
61851A IBZ
EN
0.6
LATCH
-40 to +85
8 Lead SOIC
M8.15
ISL61851BIBZ
61851B IBZ
EN
0.6
RETRY
-40 to +85
8 Lead SOIC
M8.15
ISL61851CIBZ
61851C IBZ
EN
1.1
LATCH
-40 to +85
8 Lead SOIC
M8.15
ISL61851DIBZ
61851D IBZ
EN
1.1
RETRY
-40 to +85
8 Lead SOIC
M8.15
ISL61851EIBZ
61851E IBZ
EN
0.6
LATCH
-40 to +85
8 Lead SOIC
M8.15
ISL61851FIBZ
61851F IBZ
EN
0.6
RETRY
-40 to +85
8 Lead SOIC
M8.15
ISL61851GIBZ
61851G IBZ
EN
1.1
LATCH
-40 to +85
8 Lead SOIC
M8.15
ISL61851HIBZ
61851H IBZ
EN
1.1
RETRY
-40 to +85
8 Lead SOIC
M8.15
ISL61851IIBZ
61851I IBZ
EN
1.5
LATCH
-40 to +85
8 Lead SOIC
M8.15
ISL61851JIBZ
61851J IBZ
EN
1.5
RETRY
-40 to +85
8 Lead SOIC
M8.15
ISL61851KIBZ
61851K IBZ
EN
1.5
LATCH
-40 to +85
8 Lead SOIC
M8.15
ISL61851LIBZ
61851L IBZ
EN
1.5
RETRY
-40 to +85
8 Lead SOIC
M8.15
ISL61852AIRZ
52AI
EN
0.6
LATCH
-40 to +85
8 Lead DFN
L8.3x3J
ISL61852BIRZ
52BI
EN
0.6
RETRY
-40 to +85
8 Lead DFN
L8.3x3J
ISL61852CIRZ
52CI
EN
1.1
LATCH
-40 to +85
8 Lead DFN
L8.3x3J
ISL61852DIRZ
52DI
EN
1.1
RETRY
-40 to +85
8 Lead DFN
L8.3x3J
ISL61852EIRZ
52EI
EN
0.6
LATCH
-40 to +85
8 Lead DFN
L8.3x3J
FN6937 Rev 3.00
March 8, 2012
Page 3 of 20
ISL6185
Ordering Information (Continued)
PART
NUMBER
(Notes 1, 2, 3)
ISL61852FIRZ
EN/EN
INPUT
VIN = 5V
MAXIMUM
CONTINUOUS IOUT
(A)
LATCH/AUTO
RETRY
TEMP.
RANGE (°C)
52FI
EN
0.6
RETRY
-40 to +85
8 Lead DFN
L8.3x3J
PART MARKING
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL61852GIRZ
52GI
EN
1.1
LATCH
-40 to +85
8 Lead DFN
L8.3x3J
ISL61852HIRZ
52HI
EN
1.1
RETRY
-40 to +85
8 Lead DFN
L8.3x3J
ISL61852IIRZ
52II
EN
1.5
LATCH
-40 to +85
8 Lead DFN
L8.3x3J
ISL61852JIRZ
52JI
EN
1.5
RETRY
-40 to +85
8 Lead DFN
L8.3x3J
ISL61852KIRZ
52KI
EN
1.5
LATCH
-40 to +85
8 Lead DFN
L8.3x3J
ISL61852LIRZ
52LI
EN
1.5
RETRY
-40 to +85
8 Lead DFN
L8.3x3J
ISL61853AIRZ
53AI
EN
0.6
LATCH
-40 to +85
10 Lead DFN
L10.3x3
ISL61853BIRZ
53BI
EN
0.6
RETRY
-40 to +85
10 Lead DFN
L10.3x3
ISL61853CIRZ
53CI
EN
1.1
LATCH
-40 to +85
10 Lead DFN
L10.3x3
ISL61853DIRZ
53DI
EN
1.1
RETRY
-40 to +85
10 Lead DFN
L10.3x3
ISL61853EIRZ
53EI
EN
0.6
LATCH
-40 to +85
10 Lead DFN
L10.3x3
ISL61853FIRZ
53FI
EN
0.6
RETRY
-40 to +85
10 Lead DFN
L10.3x3
ISL61853GIRZ
53GI
EN
1.1
LATCH
-40 to +85
10 Lead DFN
L10.3x3
ISL61853HIRZ
53HI
EN
1.1
RETRY
-40 to +85
10 Lead DFN
L10.3x3
ISL61853IIRZ
53II
EN
1.5
LATCH
-40 to +85
10 Lead DFN
L10.3x3
ISL61853JIRZ
53JI
EN
1.5
RETRY
-40 to +85
10 Lead DFN
L10.3x3
ISL61853KIRZ
53KI
EN
1.5
LATCH
-40 to +85
10 Lead DFN
L10.3x3
ISL61853LIRZ
53LI
EN
1.5
RETRY
-40 to +85
10 Lead DFN
L10.3x3
ISL61853MIRZ
53MI
EN
1.8
LATCH
-40 to +85
10 Lead DFN
L10.3x3
ISL61853NIRZ
53NI
EN
1.8
RETRY
-40 to +85
10 Lead DFN
L10.3x3
ISL61853OIRZ
53OI
EN
1.8
LATCH
-40 to +85
10 Lead DFN
L10.3x3
ISL61853PIRZ
53PI
EN
1.8
RETRY
-40 to +85
10 Lead DFN
L10.3x3
ISL61851EVAL1Z
8 Lead SOIC Evaluation Platform with ISL61851A installed
ISL61852EVAL1Z
8 Lead DFN Evaluation Platform with ISL61852H installed
ISL61853EVAL1Z
10 Lead DFN Evaluation Platform with ISL61853I installed
NOTES:
1. Add “-T*” suffix for tape and reel. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pbfree products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information pages for ISL6185XXC (commercial version) and ISL6185XXI (industrial version).
For more information on MSL please see techbrief TB363.
FN6937 Rev 3.00
March 8, 2012
Page 4 of 20
ISL6185
Pin Configurations
ISL6185
(10 LD DFN)
TOP VIEW
ISL6185
(8 LD SOIC/DFN)
TOP VIEW
GND
1
VIN
2
EN1/EN1
EN2/EN2
3
(GND)
EPAD
DFN Only
4
GND
1
VIN
2
VIN
3
8
FLT1
7
OUT1
OUT2
EN1/EN1
4
6
5
EN2/EN2
5
(GND)
EPAD
10
FLT1
9
OUT1
8
NC
7
OUT2
6
FLT2
FLT2
Pin Descriptions
PIN NUMBER
8 Ld
SOIC/DFN
10 Ld DFN
SYMBOL
1
1
GND
IC ground reference.
2
2, 3
VIN
Chip bias, Controlled Voltage Input, Undervoltage Lock Out (UVLO). VIN provides chip bias voltage. At
VIN < 1.7V chip functionality is disabled, FLT is active and floating, and OUT is held low. Range 0V to
5.5V.
3,
4
4,
5
EN1, EN1/
EN2, EN2
Enable/Disable inputs, Active high (EN) and active low (EN) options enable the power switch. These
inputs have internal 1M pull-off resistors. Range 0V to VIN.
5,
8
6,
10
FLT2
FLT1
Overcurrent Fault Indicator. FLT floats and is disabled until VIN >VUVLO. This output is pulled low after
the current limit time-out period has expired. Fault is not signaled due to over-temperature shut down.
Range 0V to VIN.
6,
7
7,
9
OUT2,
OUT1
Controlled Supply Output. Upon an OC condition, IOUT is current limited. Current limit response time is
within 200µs. This output remains in current limit for a nominal 12ms before being turned off either for
the latch or auto retry versions. Range 0V to VIN.
-
8
NC
PD
(DFN only)
PD
EPAD
FN6937 Rev 3.00
March 8, 2012
DESCRIPTION
This pin is not electrically connected internally.
Thermal Dissipation Exposed PAD Range: Connect to GND.
Page 5 of 20
ISL6185
Absolute Maximum Ratings
Thermal Information
Supply Voltage (VIN to GND, Note 7) . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.5V
EN, FAULT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .VIN
OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to VIN 0.3V
Output Current . . . . . . . . . . . Short Circuit Protected Current Limit of 2.5A
ESD Rating
Human Body Model (Per MIL-STD-883 Method 3015.7) . . . . . . . . . . 3kV
Machine Model (Per MIL-STD-883 Method 3015.7) . . . . . . . . . . . . 300V
Latch Up (Tested per JESD-78B; Class 2, Level A) . . . . . . . . . . . . . . 100mA
Thermal Resistance (Typical, Note 4)
JA (°C/W) JC (°C/W)
8 Lead SOIC Package (Note 4) . . . . . . . . . .
120
N/A
8 Lead 3x3 DFN Package (Notes 5, 6) . . .
48
6
10 Lead 3x3 DFN Package (Notes 5, 6) . .
53
6
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Maximum Storage Temperature Range . . . . . . . . . . . . . . -65°C to +150°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Operating Conditions
Commercial Temperature Range . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
Industrial Temperature Range . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
Supply Voltage Range (Typical). . . . . . . . . . . . . . . . . . . . . . . . . 2.3V to 5.5V
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTES:
4. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
5. JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech
Brief TB379.
6. For JC, the “case temp” location is the center of the exposed metal pad on the package underside.
7. All voltages are relative to GND, unless otherwise specified.
Electrical Specifications
range, 0°C to +75°C or -40°C to +85°C.
SYMBOL
VIN = 5V, TA = TJ, Unless Otherwise Specified. Boldface limits apply over the operating temperature
PARAMETER
TEST CONDITIONS
MIN
(Note 8)
TYP
MAX
(Note 8)
UNITS
-
71
87
m
110
m
105
m
POWER SWITCH
rDS(ON)_50
ON-Resistance at 5.0V (Pulse Tested) VIN = 5V, IOUT = 0.1A, TA = TJ = +25°C
TA = TJ = +85°C
rDS(ON)_33
ON-Resistance at 3.3V (Pulse Tested) VIN = 3.3V, IOUT = 0.1A, TA = TJ = +25°C
rDS(ON)_25
On Resistance at 2.5V (Pulse Tested) VIN = 2.5V, IOUT = 0.1A, TA = TJ = +25°C
TA = TJ = +85°C
-
90
-
TA = TJ = +85°C
-
114
130
m
127
m
150
m
VOUT_DIS
Disabled Output Voltage
VIN = 5V, Switch Disabled, 50µA Load
-
50
70
mV
ROUT_PU
Output Pull-Down Resistor
VIN = 5V, Switch Disabled
8
9.6
12
k
tR
VOUT Rise Time
RL = 10CL = 10µF, 10% to 90%
-
100
-
µs
tF
Slow VOUT Turn-off Fall Time
RL = 10CL = 10µF, 90% to 10%
-
200
-
µs
tF_fast
Fast VOUT Turn-off Fall Time
RL = 1CL = 10µF, 80% to 20%
-
23
-
µs
ISL6185xA,B,E,F
-
0.6
A
ISL6185xC,D,G,H
-
1.1
A
ISL6185xI,J,K,L
-
1.5
A
ISL61853M,N,O,P (10 Ld DFN)
-
1.8
A
ISL6185xA,B,E,F
-
0.6
A
ISL6185xC,D,G,H
-
0.9
A
ISL61851I,J,K,L (SOIC)
-
1.3
A
ISL61852, ISL61853 (DFN)
-
1.5
A
CURRENT CONTROL
IOUT_CONT_5
IOUT_CONT_5
IOUT_CONT_5
Maximum Continuous Current, VIN =
5V.
Guaranteed by Itrip minimum
specification.
IOUT_CONT_5
IOUT_CONT_3
IOUT_CONT_3
IOUT_CONT_3
Maximum Continuous Current, VIN =
3.3V.
Guaranteed by Itrip minimum
specification.
IOUT_CONT_3
FN6937 Rev 3.00
March 8, 2012
Page 6 of 20
ISL6185
Electrical Specifications VIN = 5V, TA = TJ, Unless Otherwise Specified. Boldface limits apply over the operating temperature
range, 0°C to +75°C or -40°C to +85°C. (Continued)
MIN
(Note 8)
TYP
MAX
(Note 8)
UNITS
ISL6185xA,B,E,F
-
0.6
-
A
ISL61851C,D,G,H,I,J,K,L (SOIC)
-
0.9
-
A
IOUT_CONT_2
ISL61852, ISL61853 C,D,G,H (DFN)
-
1
-
A
IOUT_CONT_2
ISL61853I,J,K,L (10 Ld DFN)
-
1
-
A
SYMBOL
PARAMETER
IOUT_CONT_2
Maximum Continuous Current, VIN =
2.5V
IOUT_CONT_2
TEST CONDITIONS
-
1
-
A
ISL6185xA,B,E,F
ISL61853M,N,O,P (10 Ld DFN)
0.70
1.02
1.52
A
ITRIP_5
ISL6185xC,D,G,H
1.15
1.45
1.95
A
ITRIP_5
ISL6185xI,J,K,L
1.55
1.82
2.25
A
ITRIP_5
ISL61853M.N,O,P
1.85
1.99
2.45
A
IOUT_CONT_2
ITRIP_5
Trip Current, VIN = 5V
ISL6185xA,B,E,F
0.65
0.86
1.20
A
ITRIP_3
ISL6185xC,D,G,H
0.95
1.25
1.60
A
ITRIP_3
ISL6185xI,J,K,L
1.35
1.60
1.85
A
ITRIP_3
ISL61853M.N,O,P
1.55
1.89
2.25
A
ISL6185xA,B,E,F
-
0.65
-
A
ITRIP_2
ISL6185xC,D,G,H
-
1
-
A
ITRIP_2
ISL6185xI,J,K,L
-
1.2
-
A
ITRIP_2
ISL61853M.N,O,P
-
1.6
-
A
ISL6185xA,B,E,F, VIN - VOUT = 1V
0.50
0.65
0.78
A
ILIM_5
ISL6185xC,D,G,H, VIN - VOUT = 1V
0.98
1.14
1.28
A
ILIM_5
ISL6185xI,J,K,L, VIN - VOUT = 1V
1.30
1.55
1.72
A
ITRIP_3
ITRIP_2
ILIM_5
Trip Current, VIN = 3.3V
Trip Current, VIN = 2.5V
Current Limit, VIN = 5V
ISL61853M,N,O,P, VIN - VOUT = 1V
1.52
1.83
2.20
A
ISL6185xA,B,E,F, VIN - VOUT = 1V
0.45
0.63
0.75
A
ILIM_3
ISL6185xC,D,G,H, VIN - VOUT = 1V
0.90
1.10
1.26
A
ILIM_3
ISL6185xI,J,K,L, VIN - VOUT = 1V
1.25
1.50
1.68
A
ILIM_3
ISL61853M,N,O,P, VIN - VOUT = 1V
1.48
1.78
2.05
A
ILIM_5
ILIM_3
Current Limit, VIN = 3.3V
ISL6185xA,B,E,F, VIN - VOUT = 1V
0.47
0.61
0.74
A
ILIM_2
ISL6185xC,D,G,H, VIN - VOUT = 1V
0.90
1.05
1.17
A
ILIM_2
ISL6185xI,J,K,L, VIN - VOUT = 1V
1.15
1.37
1.58
A
ILIM_2
ISL61853M,N,O,P, VIN - VOUT = 1V
1.3
1.63
1.90
A
ISL6185xA,B,E,F, VOUT = 0V
0.60
0.80
1.00
A
ILIM_2
Isc_5
Current Limit, VIN = 2.5V
Short Circuit Current, VIN = 5V
Isc_5
ISL6185xC,D,G,H, VOUT = 0V
1.00
1.27
1.55
A
Isc_5
ISL6185xI,J,K,L, VOUT = 0V
1.15
1.61
1.85
A
Isc_5
ISL61853M,N,O,P, VOUT = 0V
1.20
1.70
2.5
A
ISL6185XA,B,E,F, VOUT = 0V
0.35
0.48
0.60
A
Isc_3
ISL6185XC,D,G,H, VOUT = 0V
0.65
0.80
0.95
A
Isc_3
ISL6185xI,J,K,L, VOUT = 0V
0.70
1.06
1.25
A
Isc_3
ISL61853M,N,O,P, VOUT = 0V
0.90
1.24
1.50
A
Isc_3
Short Circuit Current, VIN = 3.3V
FN6937 Rev 3.00
March 8, 2012
Page 7 of 20
ISL6185
Electrical Specifications VIN = 5V, TA = TJ, Unless Otherwise Specified. Boldface limits apply over the operating temperature
range, 0°C to +75°C or -40°C to +85°C. (Continued)
MIN
(Note 8)
TYP
ISL6185xA,B,E,F, VOUT = 0V
-
0.61
Isc_2
ISL6185xC,D,G,H, VOUT = 0V
-
1.06
-
A
Isc_2
ISL6185xI,J,K,L, VOUT = 0V
-
1.30
-
A
Isc_2
ISL61853M,N,O,P, VOUT = 0V
-
1.39
-
A
SYMBOL
Isc_2
PARAMETER
Short Circuit Current, VIN = 2.5V
TEST CONDITIONS
MAX
(Note 8)
UNITS
A
Isc_5.5
Short Circuit Current, VIN = 5.5V
All ISL6185X Variants
-
-
2.5
A
tsettIlim
OC to Limit Settling Time
VIN/RL = 2ILIMCL = 10µF to within 10% of ILIM
-
200
-
µs
Severe OC to Limit Settling Time
VIN/RL = 4ILIMCL = 10µF to within 10% of ILIM
-
30
-
µs
tCL
Current Limit Duration
IOUT = ILIM
9.2
12
15
ms
tRTY
Automatic Retry Period
0.80
1
1.35
s
-
-
0.4
V
-
5
-
µA
tsettIlim_sev
I/O PARAMETERS
Vfault_lo
Ifault
Fault Output Voltage
Fault IOUT = 10mA
Fault Leakage
EN / EN Rising Threshold
VIN = 5V
1.5
1.8
2
V
EN / EN Rising Threshold Hysteresis
VIN = 5V
80
140
175
mV
EN / EN Rising Threshold
VIN = 3.3V
1.0
1.3
1.6
V
EN / EN Rising Threshold Hysteresis
VIN = 3.3V
58
80
120
mV
EN / EN Rising Threshold
VIN = 2.5V
0.95
1.1
1.3
V
EN / EN Rising Threshold Hysteresis
VIN = 2.5V
30
70
110
mV
Ren_h
ENABLE Pull-Down Resistor
Enable asserted high options
0.6
1
1.55
M
Ren_l
ENABLE Pull-Up Resistor
Enable asserted low options
0.6
1
1.55
M
Venr_5
Hys_Venr_5
Venr_3
Hys_Venr_3
Venr_2
Hys_Venr_2
tON
Enable to Output Turn-on Time
RL = 10CL = 10µF, Enable 50% to Output 90%
-
0.1
-
ms
tOFF
Enable to Output Turn-off Time
RL = 10CL = 10µF, Enable 50% to Output 10%
-
0.25
-
ms
50
75
µA
BIAS PARAMETERS
IVDD
Enabled VIN Current
Switches Closed, OUTPUT = OPEN
IVDD
Disabled VIN Current
Switches Open, OUTPUT = OPEN
-
2
5
µA
VUVLO
Rising POR Threshold
VIN Rising to functional operation
1.7
2.1
2.3
V
Reverse Blocking Leakage Current
VIN = 0V, VOUT = 5V
2
µA
Temp_dis
Over-Temperature Disable
-
150
-
°C
Temp_hys
Over-Temperature Hysteresis
-
20
-
°C
IVR
-
NOTE:
8. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
FN6937 Rev 3.00
March 8, 2012
Page 8 of 20
ISL6185
Introduction
Functional Description
The ISL6185 is a dual channel fully independent overcurrent (OC)
fault protection IC for the +2.5V to +5V environment. Each
ISL6185 incorporates in a single package two 85m P-channel
MOSFET power switches for power control. Independent enabling
inputs and fault reporting outputs compatible with 2.5V to 5V
logic allow for external control and reporting. This device features
integrated power switches with current monitoring, accurate
current limiting, reverse bias protection and current limited
timed delay to turn-off for system reliability. See Figures 13
through 28 for typical operational waveforms including both
under-current and over-current situations.
Power On Preset (POR)
The ISL6185 offers current sense and limiting, with VIN = 5V
guaranteed continuous current product variants of 0.6A, 1.1A, 1.5A
and 1.8A, making these devices well suited for a myriad of USB and
other low power (9W max) port power management applications
and configurations.
Upon enable, the switch passes a constant current to the load.
The voltage on the VOUT pin ramps up according the equation,
ILIM/COUT (V/s). Resistive or active load slows the VOUT ramp-up
toward the top of its curve.
The ISL6185 also provides thermally insensitive timed OC turn-off
and fault notification. This isolates and protects the voltage bus in
the event of a peripheral OC event or short circuit event,
independent of the adjoining switch’s electrical or the ambient
thermal condition.
The ISL6185 undervoltage lockout feature prevents turn-on of
the outputs unless the correct ENABLE state and VIN > VUVLO
are present. During initial turn-on, the ISL6185 prevents fault
reporting by blanking the fault signal.
During operation, once an OC condition is detected, the output
is current limited for tCL to allow transient OC conditions to
pass. If still in current limit after the current limit period has
elapsed, the output is turned off, and the fault is reported by
pulling the corresponding FAULT output low. On the latch-off
options, after turn-off, both the output and the FAULT signal are
latched low until reset by the enable signal being de-asserted or
until a POR occurs. At this time, the FAULT signal clears, and
the switch is ready to be turned back on. On the auto restart
options, the ISL6185 attempts to periodically turn on the
output, as long as the enable is asserted.
When disabled, the ISL6185 has a low quiescent supply current
and an output-to-input reverse current flow blocking capability.
The ISL6185 family is provided with enable polarity options and
an industry-standard 8 lead SOIC pinout, along with two versions
in the 70% smaller 3x3 DFN. The 8 Ld DFN package offers the
same performance as the 8 Ld SOIC, whereas the 10 Ld DFN
offers higher current capability in the smallest possible package
because of lower package electrical and thermal resistance.
FN6937 Rev 3.00
March 8, 2012
The ISL6185 POR feature inhibits device functionality when
VIN < VUVLO.
Reverse Polarity Protection
In any event in which the power switch is disabled and
VOUT > VIN, there will be no output-to-input current flow, nor will
the output voltage appear on the input.
Soft-Start
Fault Blanking On Start-Up
During initial turn-on, the ISL6185 prevents nuisance faults from
being reported to the system controller by blanking the fault
signal until the internal FET is fully enhanced.
Current Trip and Limiting Levels
The ISL6185 provides integrated current sensing in the MOSFET
that allows for rapid control of OC events. Once an OC condition is
detected, the ISL6185 goes into its current limiting (CL) control
mode. The ISL6185 is variant specified to allow a continuous
current (ICONT) operation of 0.6A, 1.1A, 1.5A or 1.8A. As the
current increases past its continuous current rating, it will reach
a level that causes the device to enter its current limit mode; that
is, the current trip level. The current trip level is in all cases
adequately above the ICONT rating so as not to cause unintended
false faults. The current limit is specified at VOUT = VIN - 1V to test
a known representative condition and is featured at a nominal
value slightly higher than the continuous current rating. The
speed of this current limiting control is inversely related to the
magnitude of the OC fault. Thus, a hard overcurrent is more
quickly pulled to its limiting value than a marginal OC condition.
Over-Temperature Shutdown
Although the ISL6185 has an over-temperature shutdown and
lockout feature, because of the 12ms timed shutdown, the
thermal shutdown is likely to be invoked only in extremely high
ambient temperatures.
The over-temperature protection invokes and disables the switch
turn-on operation once the die temperature is ~+140°C. It turns
off an already on switch at ~+150°C and releases the part to
operation once the die temperature falls to ~+120°C.
Page 9 of 20
ISL6185
Turn-off Time Delay
Latch-off Restart/Auto-Restart Start
During operation, once an OC condition is detected, the output
is current limited for ~12ms to allow transient OC conditions to
pass. If still in current limit and after the current limit period
has elapsed, the output is turned off, and the fault is reported
by pulling the corresponding FAULT low. The internal 12ms timer
starts upon current limiting and is independent of ambient or IC
thermal conditions, thus providing more consistent operation
over the entire temperature range.
After turn-off, with the latch-off options, both the output and the
FAULT signal are latched low until they are reset by the enable
signal being de-asserted. At this time, the FAULT signal clears,
and the IC is ready for enable to assert. On the auto restart
options, the ISL6185 attempts to periodically turn-on the
output at approximately 1s intervals, as long as the enable is
asserted. If the OC condition remains indefinitely, the fault
indication and the restart attempts also continue until the
thermal protection feature is invoked, thus increasing the
restart period.
Active Output Pull-down
Another ISL6185 feature is the 10k active pull-down on the
outputs to
工商网监
湘ICP备2023018690号
