7/10
User
’s Guide
BD9A301MUV-EVK-001
© 2017 ROHM Co., Ltd.
No. 60UG004E Rev.001
APR.2017
0
10
20
30
40
50
60
70
80
90
100
0.001
0.01
0.1
1
10
E
ff
ic
ie
n
c
y
(
%)
Load Current (A)
V
IN
=3.3V
V
IN
=5.0V
V
O
=1.8V
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
2
2.5
3
3.5
4
4.5
5
5.5
6
O
utp
ut
V
ol
tag
e
Chan
ge
(
%)
Input Voltage (V)
I
O
=1.0A
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
0
0.5
1
1.5
2
2.5
3
O
utp
ut
V
ol
tag
e
Chan
ge
(
%)
Load Current (A)
V
IN
=3.3V
V
IN
=5.0V
V
O
=1.8V
Reference Application Data
Figure 9. Efficiency vs Load Current
Figure 10. Line Regulation
Figure 11. Load Regulation
Figure 12. Load Transient Characteristics
V
O
(AC)
50mV/div
I
O
: 1A/div
I
O
: 1A/div
Time scale 2ms/div
V
IN
= 5.0V
V
O
= 1.8V
V
IN
= 5.0V
V
O
= 1.8V
I
O
: 0.75A
→
2.25A
→
0.75A
I
O
: 10mA
→
3A
→
10mA
V
O
(AC)
50mV/div
Time scale 2ms/div
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