SC1470 Datasheet, PDF (20/25 Pages) Semtech Corporation – Synchronous Buck Pseudo Fixed Frequency Power Supply Controller

SC1470
POWER MANAGEMENT
Typical Characteristics
1.2V Efficiency (Power Save Mode)
vs. Output Current vs. Input Voltage
100
95
V_BAT = 8V
90
85
80
V_BAT = 20V
75
70
65
60
55
50
0
1
2
3
4
5
6
I_OUT (A)
1.2V Efficiency (Continuous Conduction Mode)
vs. Output Current vs. Input Voltage
100
95
V_BAT = 8V
90
85
80
V_BAT = 20V
75
70
65
60
55
50
0
1
2
3
4
5
6
I_OUT (A)
1.2V Output Voltage (Power Save Mode)
1.2V Output Voltage (Continuous Conduction Mode)
vs. Output Current vs. Input Voltage
1.220
1.216
1.212
1.208
1.204
V_BAT = 20V
1.200
1.196
1.192
V_BAT = 8V
1.188
1.184
1.180
0
1
2
3
4
5
6
I_OUT (A)
vs. Output Current vs. Input Voltage
1.220
1.216
1.212
1.208
1.204
V_BAT = 20V
1.200
1.196
1.192
V_BAT = 8V
1.188
1.184
1.180
0
1
2
3
4
5
6
I_OUT (A)
1.2V Switching Frequency (Power Save Mode)
vs. Output Current vs. Input Voltage
400
V_BAT = 8V
350
1.2V Switching Frequency (Continuous Conduction
Mode) vs. Output Current vs. Input Voltage
400
V_BAT = 8V
350
300
300
250
V_BAT = 20V
200
250
V_BAT = 20V
200
150
150
100
100
50
50
0
0
1
2
3
4
5
6
I_OUT (A)
0
0
1
2
3
4
5
6
I_OUT (A)
Please refer to Figure 4 on Page 15 for test schematic
 2005 Semtech Corp.
20
www.semtech.com