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SC251 Datasheet(PDF) 15 Page - Semtech Corporation

Part # SC251
Description  Step-down DC-DC Converter with Bias LDO for WCDMA Amplifi ers
PDF  19 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC251 Datasheet(HTML) 15 Page - Semtech Corporation

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© 2006 Semtech Corp.
www.semtech.com
SC251
POWER MANAGEMENT
Oscillator Frequency vs. Temperature
R
DSON vs. VIN
R
DSON vs. Temperature
PMOS FET Leakage vs. Tempera
ture
-0.5
0
0.5
1
1.5
2
-40
-15
10
35
60
85
TJ (°C)
VIN=3.5V
VIN=2.7V
VIN=4V
VIN=5V
PASS FET Leakage vs. Input Voltage
0
1
2
3
4
5
6
2.5
3
3.5
4
4.5
5
5.5
VIN (V)
Dynamic Supply Current vs. V
IN
0.1
0.15
0.2
0.25
0.3
0.35
2.5
3
3.5
4
4.5
5
VIN(V)
Bypass FET
NMOS
PMOS
25°C
0.10
0.15
0.20
0.25
0.30
0.35
0.40
-40
-25
-10
5
20
35
50
65
80
95
110
125
TJ (° C)
Bypass FET
NMOS
PMOS
VIN=4V
-0.5
0
0.5
1
1.5
2
-40
-15
10
35
60
85
TJ (°C)
VIN=3.5V
VIN=2.7V
VIN=4V
VIN=5V
850
900
950
1000
1050
1100
1150
-40
-20
0
20
40
60
80
100
120
140
Temperature(°C)
Typical Characteristics (Cont.)



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