SC4503
POWER MANAGEMENT
Typical Characteristics
FB Voltage vs Temperature
1.30
1.5
1.4
Switching Frequency
vs Temperature
1.25
Frequency (MHz)
-50
-25
0
25
50
75
100 125
FB Voltage (V)
1.3
1.20
1.2
1.1
1.0
-50
-25
0
25
50
75
100 125
1.15
1.10
Temperature (°
C)
Temperature (°
C)
V
IN
Under-voltage Lockout
Threshold vs Temperature
2.6
2.4
Switch Current Limit
vs Temperature
2.0
1.8
Current Limit (A)
UVLO Threshold (V)
2.2
2.0
1.8
1.6
-50
-25
0
25
50
75
100 125
Temperature (°
C)
1.6
1.4
1.2
V
SHDN/SS
= 3V
1.0
-50
-25
0
25
50
75
100 125
Temperature (°
C)
Switch Saturation Voltage
vs Switch Current
400
125°
C
300
V
CESAT
(mV)
V
IN
Quiescent Current
vs Temperature
0.80
V
IN
Current (mA)
25°
C
0.75
200
0.70
100
-40°
C
0.65
V
FB
= 1.5V
0
0.0
0.5
1.0
1.5
2.0
Switch Current (A)
0.60
-50
-25
0
25
50
75
100 125
Temperature (°
C)
2007 Semtech Corp.
6
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