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參數(shù)資料
| 型號： | R1160NXX1X |
| 英文描述： | Power Management ICs |
| 中文描述： | 電源管理IC |
| 文件頁數(shù)： | 7/28頁 |
| 文件大?。?/td> | 1082K |
| 代理商： | R1160NXX1X |
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Rev. 1.12
- 7 -
I
TECHNICAL NOTES
When using these ICs, consider the following points:
Phase Compensation
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 2.2
μ
F or more capacitor C
OUT
with good frequency characteristics and ESR (Equivalent Series Resistance).
(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.) If you use a ceramic capacitor to the output pin, add as much as 1
resistor to compensate ESR value of the capacitor.
As for the input, as much as 1.0
μ
F ceramic capacitor is also recommended.
PCB Layout
Make V
DD
and GND line sufficient. When the impedance of these is high, it would be a cause of picking up the noise or
unstable operation. Connect a capacitor with as much as 1.0
μ
F capacitor between V
DD
and GND pin as close as possible.
Set external components, especially output capacitor as close as possible to the ICs and make wiring shortest.
I
TEST CIRCUITS
C1
C2
V
IN
A
I
OUT
C2 = Tantal2.2
μ
Ｆ
:*1 C1 = Tantal1.0
μ
Ｆ
*1
VDD
ECO4
OUT
CE
GND
R1160XXX1X
SERIES
Fig.1 Output Voltage vs. Output Current Test Circuit
C1
C2
V
C2 = Tantal 2.2
μ
F
C1 = Tantal 1.0
μ
F
VDD
R1160XXX1X
SERIES
ECO4
OUT
CE
GND
Fig.2 Output Voltage vs. Input Voltage Test Circuit
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