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R1111N3.51A 参数 Datasheet PDF下载

R1111N3.51A图片预览
型号: R1111N3.51A
PDF下载: 下载PDF文件 查看货源
内容描述: 模拟IC\n [Analog IC ]
分类和应用: 模拟IC
文件页数/大小: 16 页 / 141 K
品牌: RICOH [ RICOH ELECTRONICS DEVICES DIVISION ]
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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 COUT with good frequency characteristics and ESR (Equivalent Series Resistance) of which is in the  
range described as follows:  
3
1
5
V
OUT  
CE  
Ceramic  
Capacitor  
R1111N301B  
Spectrum  
Analyzer  
S.A.  
ESR  
V
IN  
GND  
2
V
IN  
I
OUT  
Ceramic Capacitor 1µF  
Measuring Circuit for white noise;R1111N301B  
The relations between IOUT (Output Current) and ESR of Output Capacitor are shown below. The conditions when the white  
noise level is under 40µV(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) VIN=4V  
(2) Frequency band :10Hz to 1MHz  
(3) Temperature : 25°C  
R1111N301B  
R1111N301B  
Ceramic 1.0µF  
Ceramic 2.2µF  
100.0  
10.0  
100.0  
10.0  
1.0  
1.0  
0.1  
0.1  
0
50  
100  
150  
0
50  
100  
150  
Output Current IOUT (mA)  
Output Current IOUT (mA)  
Make VDD and GND line sufficient. When the impedance of these is high, the noise might be picked up or not work  
correctly.  
Connect the capacitor with a capacitance of 1µF or more between VDD and GND as close as possible.  
Set external components, especially Output Capacitor, as close as possible to the ICs and make wiring shortest.  
Rev.1.11  
- 15 -  
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