參數(shù)資料
型號(hào)： R1151NXXXX
英文描述： Power Management ICs
中文描述： 電源管理IC
文件頁(yè)數(shù)： 25/26頁(yè)
文件大?。?/td> 426K
代理商： R1151NXXXX
Rev. 1.11
- 25 -
I
For Stable Operation
Phase Compensation
In these ICs, phase compensation is externally made for securing stable operation even if the load current is varied. For this
purpose, be sure to use a capacitor for the output pin with good frequency characteristics and ESR (Equivalent Series
Resistance) of which is in the range described as follows:
R1151NXXXC
CD
Vout
GND
ESR
Ceramic
Capacitanc
10
μ
F
IIout
S.A.
Vin
Ceramic
Capacitor
EXT
VIN
VDET
Spectrum
Analyzer
4.7
μ
F
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.
<Measurement conditions>
(1) V
IN
=V
OUT
+1V
(2) Frequency band: 10Hz to 1MHz
(3) Temperature: 25
°
C
(4) C
OUT: Ceramic 10
μ
F; ESR=0.075
(10kHz)
VR=2.5V (2SA1441)
0.01
0.1
1
10
100
0
50 100 150 200 250 300 350 400 450 500
Output Current
IOUT(mA)
E
)
VR=9.0V (2SA1441)
0.01
0.1
1
10
100
0
50 100 150 200 250 300 350 400 450 500
Output Current IOUT (mA)
E
)
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