sc250wltrt Semtech Corporation, sc250wltrt Datasheet - Page 12

• Manufacturer Part Number: sc250wltrt
• Description: Sc250 Step-down Dc-dc Converter With Bias Ldo For Rf Power Amplifiers
• Manufacturer: Semtech Corporation

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