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:
1.
JA
is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
2. All voltages are relative to GND, unless otherwise specified.
Electrical Specifications
V
DD
= 12V, C
VG
= 0.01µF, C
TIM
= 0.1µF, R
SENSE
= 0.1, C
BULK
= 220µF, ESR = 0.5, T
A
= T
J
= -40°C to
+85°C, Unless Otherwise Specified. Parameters with MIN and/or MAX limits are 100% tested at +25°C,
unless otherwise specified. Temperature limits established by characterization and are not
production tested.
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
PARAMETER
12V CONTROL SECTION
Current Limit Threshold Voltage
(Voltage Across Sense Resistor)
3x Current Limit Threshold Voltage
(Voltage Across Sense Resistor)
±20% Current Limit Response Time
(Current within 20% of Regulated Value)
±10% Current Limit Response Time
(Current within 10% of Regulated Value)
±1% Current Limit Response Time
(Current within 1% of Regulated Value)
Response Time to Dead Short
Gate Turn-On Time
Gate Turn-On Current
3x Gate Discharge Current
12V Undervoltage Threshold
Charge Pumped 12VG Voltage
3.3V CONTROL SECTION
Current Limit Threshold Voltage
(Voltage Across Sense Resistor)
3x Current Limit Threshold Voltage
(Voltage Across Sense Resistor)
±20% Current Limit Response Time
(Current within 20% of Regulated Value)
±10% Current Limit Response Time
(Current within 10% of Regulated Value)
V
IL12V
R
ILIM
= 10k
R
ILIM
= 5k
92
47
250
100
-
-
-
-
-
8
-
10.5
100
53
300
165
2
4
10
500
12
10
0.75
10.8
17.3
108
59
350
210
-
-
-
-
-
12
-
11.0
17.9
mV
mV
mV
mV
µs
µs
µs
ns
ms
µA
A
V
V
3 x V
IL12V
R
ILIM
= 10k
R
ILIM
= 5k
20%iLrt
10%iLrt
1%iLrt
RT
SHORT
t
ON12V
I
ON12V
3XdisI
12V
VUV
V12VG
200% Current Overload, R
ILIM
= 10k,
R
SHORT
= 6.0
200% Current Overload, R
ILIM
= 10k,
R
SHORT
= 6.0
200% Current Overload, R
ILIM
= 10k,
R
SHORT
= 6.0
C
12VG
= 0.01µF
C
12VG
= 0.01µF
C
12VG
= 0.01µF
12VG = 18V
C
PUMP
= 0.1µF
16.8
V
IL3V
R
ILIM
= 10k
R
ILIM
= 5k
92
47
250
100
-
-
100
53
300
155
2
4
108
59
350
210
-
-
mV
mV
mV
mV
µs
µs
3 x V
IL3V
R
ILIM
= 10k
R
ILIM
= 5k
200% Current Overload, R
ILIM
= 10k,
R
SHORT
= 2.5
200% Current Overload, R
ILIM
= 10k,
R
SHORT
= 2.5
4
FN9104.5
December 3, 2015
ISL6161
Electrical Specifications
V
DD
= 12V, C
VG
= 0.01µF, C
TIM
= 0.1µF, R
SENSE
= 0.1, C
BULK
= 220µF, ESR = 0.5, T
A
= T
J
= -40°C to
+85°C, Unless Otherwise Specified. Parameters with MIN and/or MAX limits are 100% tested at +25°C,
unless otherwise specified. Temperature limits established by characterization and are not
production tested.
(Continued)
SYMBOL
TEST CONDITIONS
200% Current Overload, R
ILIM
= 10k,
R
SHORT
= 2.5
RT
SHORT
t
ON3V
I
ON3V
3xdisI
3.3V
VUV
3VG
C
VG
= 0.01µF
C
VG
= 0.01µF
C
VG
= 0.01µF
C
VG
= 0.01µF, ENABLE = Low
2.7
11.2
MIN
-
-
-
8
TYP
10
500
5
10
0.75
2.85
11.9
-
12
-
3.0
-
MAX
-
UNITS
µs
ns
ms
µA
A
V
V
PARAMETER
±1% Current Limit Response Time
(Current within 1% of Regulated Value)
Response Time To Dead Short
Gate Turn-On Time
Gate Turn-On Current
3x Gate Discharge Current
3.3V Undervoltage Threshold
3.3VG High Voltage
SUPPLY CURRENT AND IO SPECIFICATIONS
V
DD
Supply Current
V
DD
POR Rising Threshold
V
DD
POR Falling Threshold
Current Limit Time-Out
ENABLE Pull-up Voltage
ENABLE Rising Threshold
ENABLE Hysteresis
ENABLE Pull-Up Current
Current Limit Time-Out Threshold (C
TIM
)
C
TIM
Charging Current
C
TIM
Discharge Current
C
TIM
Pull-Up Current
R
ILIM
Pin Current Source Output
Charge Pump Output Current
Charge Pump Output Voltage
Charge Pump Output Voltage - Loaded
Charge Pump POR Rising Threshold
Charge Pump POR Falling Threshold
t
ILIM
PWRN_V
PWR_Vth
PWR_hys
PWRN_I
C
TIM
_Vth
C
TIM
_I
C
TIM
_disI
C
TIM
_disI
R
ILIM
_Io
Qpmp_Io
Qpmp_Vo
Qpmp_VIo
Qpmp + Vth
Qpmp - Vth
C
PUMP
= 0.1µF, C
PUMP
= 16V
No load
Load current = 100µA
V
CTIM
= 8V
C
TIM
= 0.1µF
ENABLE pin open
I
VDD
4
9.5
9.0
-
1.8
1.1
0.1
60
1.8
8
1.7
3.5
90
320
17.2
16.2
15.6
15.2
8
10.0
9.4
20
2.4
1.5
0.2
80
2
10
2.6
5
100
560
17.4
16.7
16
15.7
10
10.7
9.8
-
3.2
2
0.3
100
2.2
12
3.5
6.5
110
900
-
-
16.5
16.2
mA
V
V
ms
V
V
V
µA
V
µA
mA
mA
µA
µA
V
V
V
V
ISL6161 Description and Operation
The ISL6161 is a multi-featured +12V and +3.3V dual power
supply distribution controller. Its features include programmable
current regulation (CR) limiting and time to latch off.
At turn-on, the gate capacitor of each external N-Channel
MOSFET is charged with a 10µA current source. These
capacitors create a programmable ramp (soft turn-on). A
charge pump supplies the gate drive for the 12V supply control
FET switch driving that gate to 17V.
The load currents pass through two external current sense
resistors. When the voltage across either resistor quickly
exceeds the user programmed Current Regulation voltage
threshold (CRVth) level, the controller enters current regulation.
The CRVth is set by the external resistor value on R
ILIM
pin. At
this time, the time-out capacitor, C
TIM
, starts charging with a
10µA current source and the controller enters the time-out
period. The length of the time-out period is set by the single
external capacitor (see Table 2) placed from the C
TIM
pin
(pin 10) to ground and is characterized by a lowered gate drive
voltage to the appropriate external N-Channel MOSFET. Once
C
TIM
charges to 2V, an internal comparator is tripped resulting
in both N-Channel MOSFETs being latched off. If the voltage
across the sense resistors rises slowly in response to an OC
condition, then the CR mode is entered at ~95% of the
programmed CR level. This difference is due to the necessary
hysteresis and response time in the CR control circuitry.
Table 1 shows R
SENSE
and R
ILIM
recommendations and
resulting CR level for the PCI-Express add-in card connector
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