SC411 Semtech Corporation, SC411 Datasheet - Page 22

• Manufacturer Part Number: SC411
• Description: Synchronous Buck Pseudo-Fixed Frequency Power Supply Controller
• Manufacturer: Semtech Corporation

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© 2007 Semtech Corp.
POWER MANAGEMENT
Typical Characteristics
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
50
1.2V Switching Frequency (Power Save Mode)
100
0
95
90
85
80
75
70
65
60
55
50
0
1.2V Output Voltage (Power Save Mode)
0
0
vs. Output Current vs. Input Voltage
vs. Output Current vs. Input Voltage
1.2V Effi ciency (Power Save Mode)
(High Effi ciency Design, Page 21)
1
1
1
2
V
BAT
3
= 8V
2
2
For effi ciency charts, refer to High Effi ciency Design, Figure 11 on page 21.
4
V
For all other data, refer to the Reference Design, Figure 4 on Page 17.
V
V
BAT
I
BAT
BAT
I
OUT
I
OUT
OUT
= 20V
3
= 20V
= 8V
5
3
(A)
(A)
(A)
V
V
BAT
BAT
6
= 8V
= 20V
4
4
7
8
5
5
9
10
6
6
22
1.2V Output Voltage (Continuous Conduction Mode)
1.2V Switching Frequency (Continuous Conduction
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 Effi ciency (Continuous Conduction Mode)
50
100
0
95
90
85
80
75
70
65
60
55
50
Mode) vs. Output Current vs. Input Voltage
0
0
0
vs. Output Current vs. Input Voltage
(High Effi ciency Design, Page 21)
1
1
1
2
V
BAT
3
= 8V
2
2
4
V
V
V
BAT
I
I
BAT
BAT
OUT
OUT
I
OUT
= 20V
3
5
= 20V
= 8V
3
(A)
(A)
(A)
V
V
BAT
BAT
6
= 8V
= 20V
4
4
7
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8
SC411
5
5
9
10
6
6