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參數(shù)資料
| 型號： | R1121N161B-TR |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
| 中文描述： | 1.6 V FIXED POSITIVE LDO REGULATOR, PDSO5 |
| 封裝： | MINI, SOT-23, 5 PIN |
| 文件頁數(shù)： | 15/16頁 |
| 文件大?。?/td> | 135K |
| 代理商： | R1121N161B-TR |
Rev.1.11
- 15 -
I
TECHNICAL NOTES
When using these ICs, be sure to consider 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:
Vout
Iout
Vin
Vin
CE
GND
ESR
Ceramic
Capacitor
Ceramic Capacitor
1
μ
F
R1121N301B
Spectrum
Analyzer
S.A.
4
3
2
1
Measuring Circuit for white noise ; R1121N301B
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
= 4V
(2) Frequency band :10Hz to 1MHz
(3) Temperature : 25
°
C
R1121N301B
Ceramic 1.0
μ
F
R1121N301B
Ceramic 2.2
μ
F
100.0
10.0
1.0
0.1
Output Current I
OUT
(mA)
0
100
50
150
E
)
100.0
10.0
1.0
0.1
Output Current I
OUT
(mA)
0
100
50
150
E
)
Make V
DD
and GND line sufficient. When the impedance of these is high, there is a case to pick up the noise or not to
work correctly.
Connect the capacitor with a capacitance of 1
μ
F or more between V
DD
and GND as close as possible.
Set external components, especially Output Capacitor, as close as possible to the ICs and make wiring shortest.
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| R1121N171A-TL | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
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| R1121N171B-TL | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
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相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| R1121N171A-TL | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Positive Fixed Voltage Regulator |
| R1121N171A-TR | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Positive Fixed Voltage Regulator |
| R1121N171B-TL | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Positive Fixed Voltage Regulator |
| R1121N171B-TR | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Positive Fixed Voltage Regulator |
| R1121N181A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:LOW NOISE 150mA LDO REGULATOR |
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