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BD6586MUV
● Selection of External Parts
Recommended external parts are as shown below.
When to use other parts than these, select the following equivalent parts.
? Coil
Datasheet
Value
4.7 μ H
4.7 μ H
4.7 μ H
4.7 μ H
10 μ H
4.7 μ H
10 μ H
Manufacturer
TOKO
TOKO
TOKO
TDK
TDK
TDK
TDK
Product number
A915AY-4R7M
B1015AS-4R7M
A1101AS-4R7M
LTF5022T-4R7N2R0
LTF5022T-100M1R4
VLP6810T-4R7M1R6
VLP6810T-100M1R1
Vertical
5.2
8.4
4.1
5.0
5.0
6.3
6.3
Size
Horizontal
5.2
8.3
4.1
5.2
5.2
6.8
6.8
Height (MAX)
3.0
4.0
1.2
2.2
2.2
1.0
1.0
DC current
(mA)
1870
3300
1400
2000
1400
1600
1100
DCR
( ? )
0.045
0.038
0.115
0.073
0.140
0.167
0.350
? Capacitor
Value
Pressure
Manufacturer
Product number
Vertical
Size
Horizontal
Height
TC
Cap
Tolerance
[ Power supply capacitor ]
4.7 μ F
4.7 μ F
25V MURATA
25V MURATA
GRM319B31E475K
GRM21BR61E475K
3.2
2.0
1.6
1.25
0.85±0.1
1.25±0.1
B
X5R
+/-10%
+/-10%
1 μ F 10V MURATA
GRM188B11A105K
1.6
0.8
0.8±0.1
B
+/-10%
4.7 μ F
10V MURATA
GRM219B31A475K
2.0
1.25
0.85±0.1
B
+/-10%
[ Output capacitor ]
1 μ F 35V MURATA
1 μ F 50V MURATA
1 μ F 50V MURATA
2.2 μ F 50V MURATA
GRM219B3YA105K
GRM31MB31H105K
GRM21BB31H105K
GRM31CB31H225K
2.0
3.2
2.0
3.2
1.25
1.6
1.25
1.6
0.85±0.1
1.15±0.1
1.25±0.1
1.6±0.2
B
B
B
B
+/-10%
+/-10%
+/-10%
+/-10%
? Resistor
Value
Tolerance
Manufacturer
Product number
Vertical
Size
Horizontal
Height
[ Resistor for LED current decision
<ISET pin> ]
24k ?
±0.5%
ROHM
MCR006YZPD243
0.6
0.3
0.23±0.03
? SBD
Pressure
60V
Manufacturer
ROHM
Product number
RB160M-60
Vertical
3.5
Size
Horizontal
1.6
Height
0.8±0.1
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. BD6586MUV is designed for the inductance value of 4.7μH. Don’t use the
inductance value less than 2.2μH. Select a capacitor of ceramic type with excellent frequency and temperature
characteristics.
Further, select Capacitor to be used with small direct current resistance, and pay sufficient attention to the layout pattern
shown in Page 10.
● Attention Point of PCB Layout
In PCB layout design, the wiring of power supply line should be low Impedance, and put the bypass capacitor if necessary.
Especially the wiring impedance must be lower around the DC/DC converter.
● 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. Periphery temperature Ta must be less than 85 ℃ .
2. The loss of IC must be less than dissipation Pd.
www.rohm.com
? 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
11/20
TSZ02201-0G3G0C400190-1-2
10.Dec.2012 Rev.001
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