BD6590MUV
Technical Note
●Selection of external parts
Recommended external parts are as shown below.
When to use other parts than these, select the following equivalent parts.
▪Coil
Size
Horizontal
5.2
DC current DCR
Value
Manufacturer
Product number
Height
2.2
1.0
1.0
3.0
(mA)
2000
1600
1100
1870
3300
(ꢀ)
Vertical
5.0
6.3
6.3
5.2
4.7μH
4.7μH
10μH
4.7μH
4.7μH
TDK
TDK
TDK
TOKO
TOKO
LTF5022T-4R7N2R0-LC
VLP6810T-4R7M1R6
VLP6810T-100M1R1
A915AY-4R7M
0.073
0.167
0.350
0.045
0.038
6.8
6.8
5.2
8.3
B1015AS-4R7M
8.4
4.0
▪Capacitor
Size
Horizontal
Capa
Tolerance
Value
Pressure
Manufacturer
Product number
TC
Vertical
Height
[ Supply voltage capacitor ]
2.2μF
4.7μF
4.7μF
10μF
10μF
10V
25V
25V
25V
10V
MURATA
MURATA
MURATA
MURATA
MURATA
GRM188B31A225K
GRM319R61E475K
GRM21BR61E475K
GRM31CB31E106K
GRM219R61A106K
1.6
3.2
2.0
3.2
2.0
0.8
1.6
1.25
1.6
0.8±0.1
0.85±0.1
1.25±0.1
1.6±0.2
B
+/-10%
+/-10%
+/-10%
+/-10%
+/-10%
X5R
X5R
B
1.25
0.85±0.15
X5R
[ Output capacitor ]
1μF
1μF
2.2μF
2.2μF
0.33μF
50V
MURATA
MURATA
TDK
MURATA
MURATA
GRM31MB31H105K
GRM21BB31H105K
C3225JB1H225K
GRM31CB31H225K
GRM219B31H334K
3.2
2.0
3.2
3.2
2.0
1.6
1.25
2.5
1.6
1.25
1.15±0.1
1.25±0.1
2.0±0.2
1.6±0.2
B
B
B
B
B
+/-10%
+/-10%
+/-10%
+/-10%
+/-10%
50V
50V
50V
50V
0.85±0.1
▪Resistor
Size
Horizontal
0.8
Value
Tolerance
Manufacturer
Product number
Vertical
1.6
1.6
1.6
1.6
1.6
1.6
1.6
1.6
1.6
1.6
1.6
1.6
1.6
Height
0.45
0.45
0.45
0.45
0.45
0.45
0.45
0.45
0.45
0.45
0.45
0.45
0.45
10kꢀ
15kꢀ
18kꢀ
22kꢀ
24kꢀ
27kꢀ
30kꢀ
33kꢀ
56kꢀ
62kꢀ
68kꢀ
75kꢀ
2.2Mꢀ
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
ROHM
ROHM
ROHM
ROHM
ROHM
ROHM
ROHM
ROHM
ROHM
ROHM
ROHM
ROHM
ROHM
MCR03PZPZD1002
MCR03PZPZD1502
MCR03PZPZD1802
MCR03PZPZD2202
MCR03PZPZD2402
MCR03PZPZD2702
MCR03PZPZD3002
MCR03PZPZD3302
MCR03PZPZD5602
MCR03PZPZD6202
MCR03PZPZD6802
MCR03PZPZD7502
MCR03PZPZD2204
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
▪SBD
Size
Horizontal
1.6
Pressure
60V
Manufacturer
ROHM
Product number
RB160M-60
Vertical
3.5
Height
0.8
The coil is the part that is most influential to efficiency. Select the coil whose direct current resistor (DCR) and current -
inductance characteristic is excellent. BD6xxx is designed for the inductance value of 4.7µH. Don’t use the inductance value.
less than 3.3μH. Select a capacitor of ceramic type with excellent frequency and temperature characteristics.
Further, select Capacitor to be used with small direct current resistance.
●About heat loss
In heat design, operate the DC/DC converter in the following condition.
(The following temperature is a guarantee temperature, so consider the margin.)
1. Ambient temperature Ta must be less than 85℃.
2. The loss of IC must be less than dissipation Pd.
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.07 - Rev.B
18/26
ROHM [ ROHM ]
