sc1470 Semtech Corporation, sc1470 Datasheet - Page 20

• Manufacturer Part Number: sc1470
• Description: Synchronous Buck Pseudo Fixed Frequency Power Supply Controller
• Manufacturer: Semtech Corporation

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