SC493 Datasheet, PDF (7/28 Pages) Semtech Corporation – EcoSpeedTM Step-down Controller with I2C Interface

SC493
Typical Characteristics
Efficiency vs Load — CCM and PSAVE
VOUT = 1.8V, VIN = 5V, fSW = 1MHz
100
90
PSAVE
80
CCM
70
60
50
0.1
1 _{Output Current (A)} 10
100
Load Regulation — CCM
VOUT = 1.8V, VIN = 5V, fSW = 250kHz
1.9
1.86
1.82
+1%
1.78
-1%
1.74
1.7
0
5
10
15
20
25
Output Current (A)
Output Voltage vs. Margin — CCM
2 ^{VOUT = 1.8V, VIN = 5V, fSW = 1MHz}
1.9
1.8
1.7
1.6
-10
-5
0
5
10
Margin Command (%)
Switching Frequency vs. Load — CCM
VOUT = 1.8V, VIN = 5V, fSW = 1MHz
1200
1150
1100
1050
1000
950
900
850
800
0
5
10
15
20
25
Output Current (A)
Load Regulation — PSAVE
1.9 ^{VOUT = 1.8V, VIN = 5V, fSW = 250kHz}
1.86
+1%
1.82
1.78
-1%
1.74
1.7
0
5
10
15
20
25
Output Current (A)
Output Voltage vs. VFBadj — CCM
2 ^{VOUT = 1.8V, VIN = 5V, fSW = 1MHz}
1.9
1.8
1.7
1.6
-10
-5
0
5
10
VFBadjust Command(%)