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參數(shù)資料
| 型號(hào)： | R1112NXX1X |
| 英文描述： | Power Management ICs |
| 中文描述： | 電源管理IC |
| 文件頁數(shù)： | 19/20頁 |
| 文件大?。?/td> | 219K |
| 代理商： | R1112NXX1X |
Rev. 1.10
- 19 -
I
TECHNICAL NOTES
When using these ICs, consider the following points:
In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For this purpose, be
sure to use a capacitor C
OUT
with good frequency characteristics and ESR (Equivalent Series Resistance) of which is in the
range described as follows:
1
3
5
2
R1112N XX 1B
CE
VIN
V OUT
GND
ESR
Ceramic
Cap.
IOUT
S.A.
Spectrum
Analyzer
VIN
Ceramic
Cap.
Measuring Circuit for white noise; R1112NXX1B
The relations between I
OUT
(Output Current) and ESR of Output Capacitor are shown below. The conditions when the white
noise level is under 40
μ
V(Avg.) are marked as the hatched area in the graph.
(note: When the additional ceramic capacitors are connected to the Output Pin with Output capacitor for phase compensation,
the operation might be unstable. Because of this, test these ICs with as same external components as ones to be used on the
PCB.)
<measuring conditions>
(1) V
IN
=V
OUT
+1V
(2) Frequency band :10Hz to 1MHz
(3) Temperature : 25
°
C
R11X2N151B
R11X2N151B
C
OUT
=2.2uF,C
IN
=2.2uF
0.01
0.1
1
10
100
0
30
60
90
120
150
I
OUT
[mA]
E
C
OUT
=4.7uF,C
IN
=2.2uF
0.01
0.1
1
10
100
0
30
60
90
120
150
I
OUT
[mA]
E
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