SC198 Semtech, SC198 Datasheet - Page 12

• Manufacturer Part Number: SC198
• Description: Dual DC-DC Buck Converter
• Manufacturer: Semtech

POWER MANAGEMENT
Typical Characteristics
© 2007 Semtech Corp.
-0.05
-0.15
0.15
0.05
-0.1
-0.2
0.2
0.1
0
100
100
70
90
60
50
40
30
20
10
90
80
50
40
30
20
10
80
70
60
2.7
0
0
0.001
0.001
V
OUT
V
OUT
Line Regulation at 300mA
3.1
Effi ciency vs. Load @ 2.7V
Effi ciency vs. Load @ 5.5V
= 1V PSAVE
= 1V PSAVE
V
3.5
OUT
= 1V
0.01
0.01
V
OUT
3.9
Input (V)
= 1V PWM
V
OUT
V
Load (A)
Load (A)
V
OUT
= 1.8V PWM
OUT
= 1V PWM
= 1.8V
4.3
V
OUT
= 1.8V PWM
V
OUT
0.1
0.1
4.7
= 1.8V PSAVE
V
OUT
OUT
IN
IN
= 1.8V PSAVE
ENA=ENB=VIN
ENA=ENB=VIN
5.1
5.5
1
1
12
-2.0
-4.0
-6.0
-8.0
4.0
2.0
0.0
-0.2
-0.4
-0.6
-0.8
100
0.8
0.6
0.4
0.2
80
70
90
60
50
40
30
20
10
-1
Oscillator Frequency vs. Input Voltage
2.7
1
0
0
0.001
0.001
V
Load Regulation at 3.6V
OUT
Effi ciency vs. Load @ 3.6V
3.1
25°C
= 1V PSAVE
3.5
0.01
0.01
V
OUT
85°C
3.9
Load (A)
Load (A)
Input (V)
= 1V PWM
V
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OUT
4.3
= 1.8V PWM
V
-40°C
OUT
V
0.1
0.1
OUT
4.7
IN
= 1.8V PSAVE
V
= 1V
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OUT
(PWM)
IN
ENA=ENB=VIN
= 1.8V
SC198
5.1
5.5
1
1