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SC250 Datasheet(PDF) 12 Page - Semtech Corporation

Part # SC250
Description  Step-Down DC-DC Converter with Bias LDO for RF Power Amplifi ers
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC250 Datasheet(HTML) 12 Page - Semtech Corporation

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12
© 2006 Semtech Corp.
www.semtech.com
SC250
PRELIMINARY
POWER MANAGEMENT
Typical Characteristics (Cont.)
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
`
VDAC (V)
VIN=5.5V
VIN=4.2V
VIN=3.6V
VIN=3.0V
VIN=2.7V
Control Transfer Function I
OUT = 0.3A
2.5
2.7
2.9
3.1
3.3
3.5
3.7
3.9
4.1
2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
VIN(V)
VIN Up
VIN
Down
Auto Bypass Function, V
OUT = 3.25V
0
0.001
0.002
0.003
0.004
0.005
0.006
2.5
3
3.5
4
4.5
5
5.5
6
VOUT=2.1V
VIN (V)
VOUT=1.5V
VOUT=0.3V
Dynamic Supply Current vs. V
IN
TJ (°C)
0
2
4
6
8
10
12
14
16
-40
-20
0
20
40
60
80
100
120
Shutdown Current vs. Temperature, V
IN = 3.6V
2
2.05
2.1
2.15
2.2
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
IOUT (A)
Load Regulation, V
OUT = 2.1V
1.49
1.495
1.5
1.505
1.51
1.515
1.52
2.53
3.54
4.55
5.56
50mA
150mA
300mA
600mA
TA (°C)
Line Regulation, V
OUT = 1.5V


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