BD9139MUV Datasheet, PDF (3/17 Pages) Rohm – Output 2A or More High-efficiency Step-down Switching Regulators with Built-in Power MOSFET

BD9139MUV
Technical Note
●Electrical characteristic curves【BD9139MUV】
2.0
【VOUT=1.2V】
1.6
2.0
【VOUT=1.2V】
1.6
1.2
1.2
0.8
0.4
0.0
0
Ta=25℃
Io=3A
1
2
3
4
5
INPUT VOLTAGE:VCC[V]
Fig.3 Vcc - VOUT
0.8
0.4
0.0
0
VCC=5V
Ta=25℃
Io=0A
1
2
3
4
5
EN VOLTAGE:VEN[V]
Fig.4 VEN - VOUT
1.22
【VOUT=1.2V】
1.21
1.20
1.19
VCC=5V
Io=0A
1.18
-40 -20 0 20 40 60 80 100
TEMPERATURE:Ta[℃]
Fig. 6 Ta - VOUT
100
90
80
70
【VOUT=3.3】
【VOUT=2.5】
60
【VOUT=1.8】
50
【VOUT=1.5】
【VOUT=1.2】 _VCVCC=C5=V5V
40
【VOUT=1.0】
TaT=a2=52℃5℃
30
1
10
100
1000
10000
OUTPUT CURRENT:IOUT[mA]
Fig.7 Efficiency
2.0
【VOUT=1.2V】
1.6
1.2
0.8
0.4
0.0
0
VCC= VCC=
3.3V 5.0V
Ta=25℃
1 2 3 45 6 7 8
OUTPUT CURRENT:IOUT[A]
Fig.5 IOUT - VOUT
1200
1000
800
600
400
200
VCC=5V
0
-40 -20 0 20 40 60 80 100
TEMPERATURE:Ta[℃]
Fig.8 Ta - Fosc
150
125
100
75
High side
50
Low side
25
VCC=3.3V
0
-40 -20 0 20 40 60 80 100
TEMPERATURE:Ta[℃]
Fig.9 Ta – RONN, RONP
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
VCC=5V
0.2
0.0
-40 -20 0 20 40 60 80 100
TEMPERATURE:Ta[℃]
Fig.10 Ta - VEN
400
350
300
250
200
150
SW
100
50
VCC=5V
0
-40 -20 0 20 40 60 80 100
VOUT
TEMPERATURE:Ta[℃]
Fig.11 Ta - Icc
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3/16
2009.05 - Rev.A