Maximum Storage Temperature Range . . . . . . . . . . -65
o
C to 150
o
C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . .300
o
C
(SOIC - Lead Tips Only)
Operating Conditions
VB Supply Voltage Range . . . . . . . . . . . . . . . . . . . . . . +10V to +14V
VA Supply Voltage Range . . . . . . . . . . . . . . . . . . . . . +4.5V to +5.5V
Temperature Range (T
A
) . . . . . . . . . . . . . . . . . . . . . . -40
o
C to 85
o
C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1. NOTE #1
JA
is measured with the component mounted on a low 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
PARAMETER
Nominal VB = +12V, VA = +5V, T
A
= T
J
= -40
o
C - 85
o
C, Unless Otherwise Specified
SYMBOL
I
ISET
V
ISET
- V
ISEN
SOC_Vth
25W_ilim_ft
50W_ilim_ft
25W_ilim_lt
50W_ilim_lt
Above set current regulation voltage threshold
R
ISET
= 2.8k 1%, R
SENSE
= 20m1%
R
ISET
= 2.8k 1%, R
SENSE
= 10m 1%
R
ISET
= 2.8k 1%, R
SENSE
= 20m 1%,
T
J
= 15
o
C - 45
o
C
R
ISET
= 2.8k 1%, R
SENSE
= 10m 1%,
T
J
= 15
o
C - 45
o
C
V
RSENSE =
(150mV + CR Vth) to V
GATE
to
10.8V
V
GATE
to 10.8V
V
GATE
to = 6V
Overcurrent
Severe Overcurrent
GATE Voltage
TEST CONDITIONS
MIN
18.5
-4
-
2.2
4.5
2.6
5.2
TYP
20
0
150
2.8
5.6
2.8
5.6
MAX
21.5
4
-
3.4
6.7
3.0
6.0
UNIT
S
A
mV
mV
A
A
A
A
+12V (VB) BULK SUPPLY CONTROL
ISET Current Source
Current Limit Amp Offset Voltage
Severe Overcurrent Threshold
Full Temp 25W VB Current Regulation
Full Temp 50W VB Current Regulation
Limited Temp 25W VB Current Regulation
Limited Temp 50W VB Current Regulation
GATE PARAMETERS
GATE Response Time to Severe Overcurrent
GATE Response Time to Overcurrent
GATE Turn-On Current
GATE Pull-Down Current
GATE Pull-Down Current
GATE High Voltage
VB PARAMETERS
IC Supply Current
VB POR Rising Threshold
VB POR Falling Threshold
VB POR Threshold Hysteresis
DC-DC Enable Undervoltage Threshold
VB_On Rising Threshold
VB_On Hysteresis
VB_On Pull-Up Voltage
VB_On Pull-Up Current
I
VB
VB
POR_L2H
VB
POR_H2L
VB Low to High
VB High to Low
-
7.8
7.5
0.1
9.2
1.4
-
VB_On Pin Open
2.7
9
3
8.4
8.1
0.3
9.6
1.7
170
3.2
17
5
9
8.7
0.6
10
2.0
-
-
25
mA
V
V
V
V
V
mV
V
A
Tr_gate_soc
Tr_gate_oc
I
GATE
Igte_4v_oc
Igte_4V_soc
Vgate_h
-
-
8.4
45
-
100
600
10
75
0.8
-
-
11.6
-
-
-
nS
ns
A
mA
A
V
VB+4.5V VB+5V
VB
POR_HYS
VB
POR_L2H -
VB
POR_H2L
DCen
UV_VTH
PWR_Vth
PWR_hys
PWRN_V
PWRN_I
FN9028 Rev 1.00
July 2004
Page 4 of 11
ISL6160
Electrical Specifications
PARAMETER
CTIM PARAMETERS
C
TIM
Charging Current
C
TIM
Fault Pull-Up Current
Current Limit Time-Out Threshold Voltage
+5V AUXILIARY SUPPLY CONTROL
VA Integrated Switch On Resistance
Disabled Output Voltage
V
OUT
Rising Rate
Slow V
OUT
turn-off rate
Fast V
OUT
turn-off rate
CURRENT CONTROL
Current Limit
OC Regulation Settling Time
Severe OC Regulation Settling Time
Over Current Latch-off Time
I/O PARAMETERS
Fault Output Voltage
ENABLE High Threshold
ENABLE Low Threshold
ENABLE Input Current
BIAS PARAMETERS
Enabled VA_Iin Current
Disabled VA_Iin Current
Undervoltage Lockout Threshold
UV Hysteresis
I
en_VA
I
dis_VA
V
UVLO
UV
HYS
Switches Closed, VA_Out = OPEN, T
J
>0
o
C
Switches Open, VA_Out = OPEN
VIN Rising, Switch Enabled
-
-
1.7
50
120
1
2.25
100
200
5
2.5
-
A
A
V
mV
Vfault_hi
Ven_vih
Ven_vil
Ien_i
I
OUT
= 10mA
V
IN
= 5.5V
V
IN
= 4.5V
ENABLE = 0V to 5V, V
IN
= 5V, T
J
> 25
o
C
-
2.0
-
-0.5
-
-
-
-
0.3
-
0.8
0.5
V
V
V
A
Ilim
Tsett_ocr
Tsett_socr
t
OC_loff
R
L
= 5C
L
= 0.1F to Within 10% of CR
R
L
< 1C
L
= 0.1F to Within 10% of CR
0.75
-
-
-
1
1.5
100
12
1.25
-
-
A
ms
s
ms
r
DS(ON)
V
OUT_DIS
t_vout_rt
Toff_svout
Toff_fvout
V
IN
= 5V, I
OUT
= 0.4A, T
A
= T
J
= 25
o
C
T
A
= T
J
= 85
o
C
V
IN
= 5V, Switch Disabled, No Load
R
L
= 10C
L
= 0.1F, 10%-90%
R
L
= 10C
L
= 0.1F, 90%-10%
R
L
= 10C
L
= 0.1F, 90%-10%
-
-
-
-
-
-
0.125
0.160
300
8
8
4
0.150
0.200
450
-
-
-
mV
V/mS
V/mS
V/uS
C
TIM
_ichg0
C
TIM
_ichg6
C
TIM
_Vth
V
CTIM
= 0V
V
CTIM
= 6V
CTIM Voltage
16
5
1.3
20
8
1.8
23
11
2.3
A
mA
V
Nominal VB = +12V, VA = +5V, T
A
= T
J
= -40
o
C - 85
o
C, Unless Otherwise Specified
(Continued)
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
S
ISL6160 Description and Operation
The ISL6160 is the first power supply sequencer for the
emerging InfiniBand module (IM) hot swap application. This IC
controls both the +12V VB(ulk) and +5V VA(ux) supplies
providing soft start during hot insertion and overcurrent (OC)
protection during operation.
For VB control and protection, the ISL6160 features include an
accurate current detecting comparator, current limiting for the
range of both 25W and 50W capable power ports, a current
regulated time delay to latch off and soft start turn-on ramp.
These features are all programmable with a minimum of
external passive components. The ISL6160 also includes
severe overcurrent protection that immediately shuts down the
MOSFET switch should there be a shorted IM load.
The VB_ON pin provides on-off control of the external VB
switch once VB_IN > 9V. Driving this pin high causes the gate
pin to charge the external gate capacitor with a 10uA current
setting the soft start ramp rate. Large capacitive loads can thus
be safely turned on with no inrush current spiking nor disruption
of the voltage supply rail.
The VB load current passes through an external current sense
resistor. When the voltage across the sense resistor exceeds
the user programmed ISET voltage threshold, the controller
enters current regulation (CR). The regulated current level is
fixed by the R
ISET
and R
SENSE
resistors. See Table 1 for
R
ISET
programming resistor value and the resulting nominal
CR threshold voltage.
TABLE 1.
NOMINAL REGULATION LEVEL
(R
SENSE
= 0.020)
R
ISET
RESISTOR
1.0k
2.8k
3.48k
5.6k
NOMINAL
OC Vth
20mV
56mV
70mV
112mV
CURRENT (A)
1
2.8
3.5
5.6
POWER (W)
12
33.6
42
67.2
NOTE: Nominal Vth = R
ISET
x 20A.
During CR, the CTIM pin starts charging the time-out capacitor
with a 20A current source and the controller enters the delay
time to latch-off period. This feature allows transient currents
that exceed the designed limit to pass without immediately
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