SC4524D Datasheet, PDF (8/21 Pages) Semtech Corporation – 18V 2A Step-Down Switching Regulator 2A Output Current

Curve 11
Curve 12
SC4524D
Typical Characteristics (Cont.)
SS270 REV 6-7
SS270 REV 6-7
SS270 REV 6-7
VIN Thresholds vs Temperature
3.0
VIN Supply Current
vs Soft-Start Voltage
2.5
VIN Shutdown Current vs VIN
50
2.9
Start
2.8
125^oC
2.0
-40^oC
1.5
V_SS = 0
40
-40^oC
30
2.7
1.0
20
125^oC
2.6
2^C.5 ^{urve 14UVLO}
0.5
10
Curve 15
2.4
0.0
0
-50 -25 0 25 50 75 100 125
0
0.5
1
1.5
2
0 2 4 6 8 10 12 14 16 18
Temperature (^oC)
V_SS (V)
V_IN (V)
SS270 REV 6-7
SS270 REV 6-7
SS270 REV 6-7
VIN Quiescent Current vs VIN
2.5
125^oC
2.0
-40^oC
1.5
1.0
0.5
V_COMP = 0
0.0
0 2 4 6 8 10 12 14 16 18
V_IN (V)
SS Shutdown Threshold
vs Temperature
0.40
0.35
0.30
0.25
0.20
-50 -25 0 25 50 75 100 125
Te mperature (^oC)
Soft-Start Charging Current
vs Soft-Start Voltage
0.0
-0.5
-1.0
125^oC
-1.5
-40^oC
-2.0
-2.5
-3.0
0
0.5
1
1.5
2
V_SS (V)