SC4501
POWER MANAGEMENT
Typical Characteristics
Feedback Voltage vs Temperature
1.3
1.25
1.2
1.15
-50 -25
0 25 50 75 100 125
Temperature (ºC)
ROSC vs Switching Frequency
100
VIN = 2V
25ºC
10
1
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Frequency (MHz)
Switching Frequency
vs Temperature
1.7
ROSC = 7.68KΩ
1.6
VIN = 12V
1.5
VIN = 2V
1.4
1.3
-50 -25
0 25 50 75 100 125
Temperature (ºC)
Switch Saturation Voltage
vs Switch Current
400
25ºC
300
85ºC
200
-40ºC
100
0
0 0.5 1 1.5 2 2.5 3
Switch Current (A)
Switch Current Limit
vs Temperature
3
2.8
2.6
2.4
2.2
2
-50 -25 0
25 50 75 100
Temperature (ºC)
Minimum VIN vs Temperature
1.5
1.4
1.3
1.2
1.1
1
-50 -25
0 25 50 75 100 125
Temperature (ºC)
VIN Quiescent Current vs Temperature
1.3
Not Switching
1.2
VIN = 16V
1.1
1
VIN = 2V
0.9
0.8
-50 -25
0 25 50 75 100 125
Temperature (ºC)
VIN Current in Shutdown
vs Input Voltage
50
40
-40ºC
30
125ºC
20
10
0
0
VSHDN = 0
5
10
15
20
Input Voltage (V)
Shutdown Threshold
vs Temperature
1.20
VIN = 2V
1.15
1.10
1.05
1.00
-50 -25
0 25 50 75 100 125
Temperature (ºC)
© 2005 Semtech Corp.
6
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