Dual PCI 2.2 Hot-Swap Controllers
_______________________________________________________________________________________   5
Typical Operating Characteristics
(V
+12VIN
= +12V, V
3.3VAUXIN
= +3.3V, V
-12VIN
= -12V, V
5V
= +5V, V
3.3V
= +3.3V, R
5VSEN_
= 0.005&, R
3.3VSEN_
= 0.005&, C
3.3VO_
=t
OUTPUT CURRENT (A)
1.05
0.90
0.60
0.75
0.30
0.45
0.15
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
2.5
0
1.20
3.3VAUX_ VOLTAGE
vs. OUTPUT CURRENT
3.3VO_ SENSE RESISTOR VOLTAGE
vs. DIFFERENTIAL SWITCH VOLTAGEt
V
IN
 - V
3.3VSEN_
 (V)
30
34
32
36
38
42
46
44
48
40
3.0
2.5
1.5
2.0
1.0
3.5
DURING CURRENT LIMIT
FAIRCHILD
FDS6670A
3.3VO_ VOLTAGE
vs. OUTPUT CURRENT
OUTPUT CURRENT (A)
2
3.18
3.20
3.22
3.28
3.30
3.32
3.16
0
8
4
6
3.24
3.26
FAIRCHILD
FDS6670A
20
24
22
28
26
30
34
38
36
40
1.0   1.5  2.0   2.5   3.0   3.5   4.0  4.5  5.0
5VO_ SENSE RESISTOR VOLTAGE
vs. DIFFERENTIAL SWITCH VOLTAGE
V
IN
 - V
5VSEN_
 (V)
32
DURING CURRENT LIMIT
FAIRCHILD
FDS6670A
5VO_ VOLTAGE
vs. OUTPUT CURRENT
OUTPUT CURRENT (A)
1
4.82
4.84
4.86
4.88
4.90
4.92
4.80
0
5
2
3
4
4.94
4.96
4.98
5.00
5.02
FAIRCHILD
FDS6670A
-12VO_ CURRENT FOLDBACK
vs. DIFFERENTIAL SWITCH VOLTAGE
V
-12VIN
 - V
-12VO_
 (V)
2
50
100
150
200
250
0
0
4
6
8
10
12
-12VO_ VOLTAGE
vs. OUTPUT CURRENT
OUTPUT CURRENT (mA)
50
-12.0
-11.9
-11.8
-11.7
-11.6
-11.5
-12.1
0
250
100
150
200
+12VO_ CURRENT FOLDBACK
vs. DIFFERENTIAL SWITCH VOLTAGE
V
+12VIN
 - V
+12VO_
 (V)
2
0.1
0.3
0.5
0.7
0.9
1.1
-0.1
0
4
6
8
10
12
+12VO_ VOLTAGE
vs. OUTPUT CURRENT
OUTPUT CURRENT (A)
1.0
0.5
11.5
11.6
11.7
11.8
11.9
12.0
12.1
11.4
0
1.5
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