SC908 View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'SC908' PDF : 30 Pages View PDF
Typical Characteristics (continued)
DC/DC Converter Line Regulation
2.23
VSVOUT = 2.2V (RS1 = 340kΩ, RS2 = 100kΩ), TA = 25οC
ISVOUT = 35mA
2.22
ISVOUT = 10mA
PSAVE Mode
2.21
2.2
2.19
2.18
3
ISVOUT = 100mA
PWM Mode
ISVOUT = 150mA
3.2
3.4
3.6
3.8
4
4.2
VBAT (V)
DC/DC Converter Temperature Regulation
2.23
VSVOUT = 2.2V (RS1 = 340kΩ, RS2 = 100kΩ), VBAT = 3.7V
ISVOUT = 35mA
2.22
ISVOUT = 10mA
PSAVE Mode
2.21
2.2
2.19
2.18
-40
-20
ISVOUT = 100mA
PWM Mode
ISVOUT = 150mA
0
20
40
60
80
Junction Temperature (oC)
100 120
DC/DC Converter Efficiency Detail
VSVOUT = 2.2V (RS1 = 340kΩ, RS2 = 100kΩ), VBAT = 3.6V, L = 4.7 μH
93
PSAVE Mode
92
PSAVE Mode
91
PWM Mode
90
PWM Mode
89
88
87
86
85
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
ISVOUT (mA)
SC908
DC/DC Converter Load Regulation
VSVOUT = 2.2V (RS1 = 340kΩ, RS2 = 100kΩ), TA = 25οC, VBAT = 3.7V
2.25
2.24
2.23
2.22
2.21
Decreasing Load
2.2
Increasing Load
2.19
2.18
2.17
2.16
2.15
0
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
ISVOUT (mA)
DC/DC Converter Efficiency
VSVOUT = 2.2V (RS1 = 340kΩ, RS2 = 100kΩ), VBAT = 3.6V, L = 4.7 μH
100
90
PSAVE Mode
80
PWM Mode
70
60
50
40
30
20
10
0
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
ISVOUT (mA)
DC/DC Converter Efficiency — Low Loads
VSVOUT = 2.2V (RS1 = 340kΩ, RS2 = 100kΩ), VBAT = 3.6V, L = 4.7 μH
100
90
80
70
60
50
40
30
20
10
0
1
10
100
ISVOUT (mA)
12
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