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BD6581GU
● 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 Manufacturer
Product number
Size
Vertical Horizontal
Height
(MAX)
DC
current
(mA)
DCR
( ? )
4.7 μ H
4.7 μ H
4.7 μ H
4.7 μ H
4.7 μ H
10 μ H
TOKO
TOKO
TOKO
TDK
TDK
TDK
A915AY-4R7M
B1015AS-4R7M
A1101AS-4R7M
LTF5022T-4R7N2R0
VLP6810T-4R7M1R6
VLP6810T-100M1R1
5.2
8.4
4.1
5.0
6.3
6.3
5.2
8.3
4.1
5.2
6.8
6.8
3.0
4.0
1.2
2.2
1.0
1.0
1870
3300
1400
2000
1600
1100
0.045
0.038
0.115
0.073
0.167
0.350
? Capacitor
Value
Pressure
Manufacturer
Product number
Vertical
Size
Horizontal
Height
TC
Cap
Tol
[ Supply voltage capacitor ]
10 μ F
10 μ F
4.7 μ F
4.7 μ F
25V
10V
25V
25V
MURATA
MURATA
MURATA
MURATA
GRM31CB31E106K
GRM219R61A106K
GRM319R61E475K
GRM21BR61E475K
3.2
2.0
3.2
2.0
1.6
1.25
1.6
1.25
1.6 ± 0.2
0.85 ± 0.15
0.85 ± 0.1
1.25 ± 0.1
B
X5R
X5R
X5R
+/-10%
+/-10%
+/-10%
+/-10%
[ Smoothing capacitor for built-in regulator ]
1 μ F
10V
MURATA
GRM188B10J105K
1.6
0.8
0.8 ± 0.1
B
+/-10%
[ Output capacitor ]
1 μ F
1 μ F
2.2 μ F
0.33 μ F
50V
50V
50V
50V
MURATA
MURATA
MURATA
MURATA
GRM31MB31H105K
GRM21BB31H105K
GRM31CB31H225K
GRM219B31H334K
3.2
2.0
3.2
2.0
1.6
1.25
1.6
1.25
1.15 ± 0.1
1.25 ± 0.1
1.6 ± 0.2
0.85 ± 0.1
B
B
B
B
+/-10%
+/-10%
+/-10%
+/-10%
? Resistor
Value
Tolerance Manufacturer
Product number
Vertical
Size
Horizontal
Height
[ Resistor for LED current decision
<ISETH pin> ]
30k ?
±0.5%
ROHM
MCR006YZPD303
0.6
0.3
0.23
[ Resistor for over current decision
<SENSP pin> ]
100m ?
±1%
ROHM
MCR10EZHFSR100
2.0
1.25
0.55
? SBD
Pressure
60V
Manufacturer
ROHM
Product number
RB160M-60
Vertical
3.5
Size
Horizontal
1.6
Height
0.8
? MOS FET Nch
Pressure
45V
60V
Manufacturer
ROHM
ROHM
Product number
RTR020N05
RSS065N06
Vertical
2.8
6.0
Size
Horizontal
2.9
5.0
Height
1.0
1.75
Current
Ability
2A
6.5A
Driving
Voltage
2.5V
4.0V
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. BD6581GU is designed for the inductance value of 4.7μH. Doesn’t use the
inductance value less than 2.2 μH. 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 P.20.
www.rohm.com
? 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
21/32
TSZ02201-0G3G0C400170-1-2
03.Dec.2012 Rev.001
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