BU28TA2WNVX(2009) Просмотр технического описания (PDF) - ROHM Semiconductor
Номер в каталоге
Компоненты Описание
производитель
BU28TA2WNVX Datasheet PDF : 28 Pages
| |||
BUTA2WNVX Series, BUTA2WHFV Series
Lineup
■ 200 mA BU□□TA2WNVX / HFV series
Product Name
BU□□TA2WNVX
BU□□TA2WHFV
1.5 1.8 2.5 2.6 2.7 2.8 2.85
Package
○○○○○○
2.9 3.0 3.1 3.2 3.3 3.4
○○○○○○
○
-
SSON004X1216
HVSOF5
-
Model name: BU□□TA2WNVX / HFV
a
Symbol
Contents
□□
Specification of output voltage
Output
Output
voltage (V)
□□
voltage (V)
15
1.5 V(Typ.)
28
2.8 V(Typ.)
a
18
1.8 V(Typ.)
2J
2.85 V(Typ.)
25
2.5 V(Typ.)
29
2.9 V(Typ.)
26
2.5 V(Typ.)
30
3.0 V(Typ.)
27
2.7 V(Typ.)
31
3.1 V(Typ.)
□□
32
33
34
-
-
Output
voltage (V)
3.2 V(Typ.)
3.3 V(Typ.)
3.4 V(Typ.)
-
-
Input/Output terminal equivalent circuit schematic
1pin (VOUT)
2pin (GND)
VIN
3pin (STBY)
VIN
VOUT
STBY
Technical Note
4pin (VIN)
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.
Capacity value of ceramic capacitor - DC bias characteristics
(Example)
10
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0
10-V withstand voltage
F characteristics
10-V withstand voltage
B1characteristics
GRM188B11A105KA61D
10-V withstand voltage
B characteristics
6.3-V withstand voltage
B characteristics
10-V withstand voltage
F characteristics
4-V withstand voltage
X6S characteristics
0.5
1
1.5
2
2.5
3
3.5
4
DC Bias Voltage [V]
Fig.3 Capacity – bias characteristics
100 Unstable area
10
1
Stability area
0.1
0.01
0
50
100
150
200
IOUT [mA]
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
4/27
Fig.4 Stability area characteristics (Example)
2009.05 - Rev.B
Share Link: 