SC2620
POWER MANAGEMENT
Typical Characteristics
Soft-Start Pin Current
vs Soft-Start Voltage
0
T = 25°C
-20
V
IN
=5V
-40
I
SS
(
µ
A)
-60
-80
1
3
FB Threshold (V)
V
IN
Supply Current
vs Soft-Start Voltage
4
T
A
= 25°C
0.9
1.0
FB Overload Threshold
vs Temperature
I
IN
(mA)
I
SS
of the
Swept Channel
0.8
2
V
IN
= 5V
0.7
V
SS1
= V
SS2
V
COMP1
= 0
V
COMP2
= 0
-100
-120
0.0
0.5
I
SS
of the Other
Channel (V
SS
= 0)
0
0.6
0.5
1.0
V
SS
(V)
1.5
2.0
0.0
0.5
1.0
V
SS
(V)
1.5
2.0
-50
-25
0
25
50
75
100 125
Temperature (°C)
PGOOD1 Threshold to V
FB
Difference Voltage vs Temperature
-90
90
85
Efficiency vs Load Current
-92
Voltage (mV )
Efficiency (%)
80
75
70
65
60
55
V
OUT1
= 3.3V
-94
V
OUT2
= 1.2V
-96
-98
50
45
Figure 1(a), V
IN
=12V
-100
-50
-25
0
25
50
75
100 125
Temperature (°C)
40
0
0.5
1
1.5
2
Load Current (A)
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2006 Semtech Corp.
7
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