BD9757MWV_10 Datasheet, PDF (5/24 Pages) Rohm – Switching Regulator IC

BD9757MWV
●Reference data (1)
Start-up circuit operating frequency temperature characteristic
600
500
400
300
200
100
0
-40 -20
0
20 40 60 80 100
Ta [℃]
Fig.1 Start-up circuit frequency-Temp
Current mode operating frequency temperature characteristic
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
1.00
-40 -20
0
20 40 60 80 100
Ta [℃]
Fig.2 Frequency CH1 ~ 5-Temp
Technical Note
Voltage mode operating frequency temperature characteristic
700
680
660
640
620
600
580
560
540
520
500
-40 -20 0
20 40 60 80 100
Ta [℃]
Fig.3 Frequency CH6 ~ 8-Temp
VREGA output voltage temperature characteristic
2.60
2.58
2.56
2.54
2.52
2.50
2.48
2.46
2.44
2.42
2.40
-40 -20 0
20 40 60 80 100
Ta [℃]
Fig.4 VREGA output voltage-Temp
VREF6 output voltage temperature characteristic
1.06
1.04
1.02
1.00
0.98
0.96
0.94
-40 -20 0
20 40 60 80 100
Ta [℃]
Fig.5 CH6 Base voltage-Temp
100
95
90
85
80
75
70
65
60
10
CH1 boost 5.0 efficiency data
Vin=1.5V
Vin=2.4V
Vin=3.6V
Vin=4.2V
100
1000
Load current[mA]
10000
Fig.6 CH1
5.0V voltage boost efficiency-Io
100
95
90
85
80
75
70
65
60
55
50
45
40
10
CH4 step-down 1.8V efficiency data
Vin=2.4V
Vin=3.6V
Vin=4.2V
Vin=5.5V
100
1000
Load current [mA]
Fig.9 CH4
1.8V step-down efficiency-Io
CH2 step-down 3.2V efficiency data
100
95
90
85
80
75
70
65
60
55
50
10
100
Load current[mA]
Vin=3.6V
Vin=4.2V
Vin=4.8V
Vin=5.5V
100
0
Fig.7 CH2
3.2V step-down efficiency-Io
CH5 step-down 3.5V efficiency data
100
95
90
85
80
75
70
65
Vin=4.2V
Vin=4.8V
60
Vin=5.5V
55
50
10
100
1000
Load current [mA]
Fig.10 CH5
3.5V step-down efficiency-Io
100
95
90
85
80
75
70
65
60
55
50
45
40
10
CH3 step-down 1.2V efficiency data
100
Load current [mA]
Vin=1.5V
Vin=2.4V
Vin=3.6V
Vin=4.2V
Vin=5.5V
1000
Fig.8 CH2
3.2V step-down efficiency-Io
100
90
80
70
60
50
40
1
CH6 Reversal -6V efficiency data
10
Load current [mA]
Vin=2.4V
Vin=3.6V
Vin=4.2V
Vin=5.5V
100
Fig.11 CH6
-6V inverting efficiency-Io
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2010.11 - Rev.A