SC198A Datasheet, PDF (7/15 Pages) Semtech Corporation – Dual DC-DC Buck Converter with High Current Capability

SC198A
Typical Characteristics
Efficiency vs. Load at V_IN = 2.7V, Side A
100
VOUT = 1.8V PSAVE
90
80 ^{VOUT = 1.0V PSAVE}
70
60 ^{VOUT = 1.8V PWM}
50
VOUT = 1.0 PWM
40
30
20
10
0
0.001
0.01
0.1
1
Load (A)
Efficiency vs. Load at V = 5.5V, Side A
IN
100
90
VOUT = 1.8V PSAVE
80
70
VOUT = 1.0V PSAVE
60
50
VOUT = 1.8V PWM
40
30
VOUT = 1.0 PWM
20
10
0
0.001
0.01
0.1
1
Load (A)
Line Regulation at 300mA
0.2
0.15
VOUT = 1.8V PWM
0.1
VOUT = 1.0 PWM
0.05
0
-0.05
-0.1
-0.15
-0.2
2.7
3.26
3.82
4.38
4.94
5.5
Input (V)
Efficiency vs. Load at V_IN = 3.6V, Side A
100
90 ^{VOUT = 1.8V PSAVE}
80 VOUT = 1.0V PSAVE
70
60
VOUT = 1.8V PWM
50
40
VOUT = 1.0 PWM
30
20
10
0
0.001
0.01
0.1
1
Load (A)
Efficiency vs. Load at V = 5.5V, Side B
IN
100
VOUT = 1.8V PSAVE
90
80
VOUT = 1.0V PSAVE
70
60
VOUT = 1.8V PWM
50
40
VOUT = 1.0 PWM
30
20
10
0
0.001
0.01
0.1
1
Load (A)
Load Regulation — V_OUT=1.8V, V_IN=3.6V
3
2
1
VOUT = 1.8V PWM
0
VOUT = 1.0 PWM
-1
-2
-3
0.001
0.01
0.1
1
Load (A)
7