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BU2JTA2WNVX 데이터시트(PDF) 5 Page - Rohm

부품명 BU2JTA2WNVX
상세설명  1ch 200mA CMOS LDO Regulators
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제조업체  ROHM [Rohm]
홈페이지  http://www.rohm.com
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Technical Note
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BUTA2WNVX series, BUTA2WHFV series
www.rohm.com
2011.01 - Rev.C
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.4 Stability area characteristics (Example)
Input/Output terminal equivalent circuit schematic
1pin (VOUT)
2pin (GND)
3pin (STBY)
4pin (VIN)
VIN
STBY
Fig.2 Input/Output equivalent circuit
About input/output capacitor
It is recommended to place a capacitor as close as possible to the
pins between the input terminal and GND or between the output
terminal and GND.
The capacitor between the input terminal and GND becomes valid
when source impedance increases or when wiring is long. The
larger the capacity of the output capacitor between the output
terminal and GND is, the better the stability and characteristics in
output load fluctuation become. However, please check the status
of actual implementation. Ceramic capacitors generally have
variation, temperature characteristics, and direct current bias
characteristics and the capacity value also decreases with time
depending on the usage conditions. It is recommended to select a
ceramic capacitor upon inquiring about detailed data of the related
manufacturer.
About the equivalent series resistance (ESR) of a ceramic capacitor
Capacitors generally have ESR (equivalent series resistance) and it
operates stably in the ESR-IOUT area shown on the right. Since
ceramic capacitors, tantalum capacitors, electrolytic capacitors, etc.
generally have different ESR, please check the ESR of the
capacitor to be used and use it within the stability area range shown
in the right graph for evaluation of the actual application.
VOUT
VIN
Fig.3 Capacity – bias characteristics
Capacity value of ceramic capacitor - DC bias characteristics
(
Example)
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10
00.5
1
1.5
22.53
3.54
DC Bias Voltage [V]
10-V withstand voltage
B1characteristics
GRM188B11A105KA61D
10-V withstand voltage
B characteristics
6.3-V withstand voltage
B characteristics
4-V withstand voltage
X6S characteristics
10-V withstand voltage
F characteristics
10-V withstand voltage
F characteristics
0.01
0.1
1
10
100
0
50
100
150
200
IOUT [mA]
Stability area
Unstable area


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