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參數(shù)資料
| 型號： | R1171S171A |
| 廠商： | Ricoh Co., Ltd. |
| 英文描述： | 2.0A/1.5A LDO REGULATOR |
| 中文描述： | 2.0A/1.5A LDO穩(wěn)壓器 |
| 文件頁數(shù)： | 8/36頁 |
| 文件大?。?/td> | 746K |
| 代理商： | R1171S171A |
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R1172x
TYPICAL APPLICATION
(R1172xxx1B/D)
8
C1
R1172x
Series
V
DD
V
OUT
CE
GND
C2
V
OUT
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, use a capacitor C2 with good frequency characteristics and ESR (Equivalent Series Resistance).
The recommendation value is as follows.
Output Voltage C2 recommendation value
V
OUT
< 1.0V
Tantalum 4.7
μ
F or more
Kyocera
Murata
Murata
Kyocera
Murata
Components Recommendation
1.0
<
=
V
OUT
<
=
3.3V
Ceramic 4.7
μ
F or more
4.7
μ
F (1608)
4.7
μ
F (1608)
10
μ
F (1608)
4.7
μ
F (thin 2012)
10
μ
F (2012)
Part Number : CM105X5R475M06AB
Part Number : GRM188R60J475KE19B
Part Number : GRM188B30G106ME46B
Part Number : CT21X5R475M06AB
Part Number : GRM21BB30J106K
3.3V < V
OUT
Ceramic 4.7
μ
F or more
PCB Layout
Make V
DD
and GND lines sufficient. If their impedance is high, noise pickup or unstable operation may result.
Connect a capacitor C1 with a capacitance value as much as 4.7
μ
F or more between V
DD
and GND pin, and as
close as possible to the pins.
Set external components, especially the output capacitor C2, as close as possible to the ICs, and make wiring
as short as possible.
If you use a tantalum type capacitor and ESR value of the capacitor is large, output might be unstable.
Evaluate your circuit with considering frequency characteristics.
Depending on the capacitor size, manufacturer, and part number, the bias characteristics and temperature
characteristics are different. Evaluate the circuit with actual using capacitors.
相關PDF資料 |
PDF描述 |
|---|---|
| R1171S181A | 2.0A/1.5A LDO REGULATOR |
| R1171S191A | 2.0A/1.5A LDO REGULATOR |
| R1171S201A | 2.0A/1.5A LDO REGULATOR |
| R1171S211A | 2.0A/1.5A LDO REGULATOR |
| R1171S221A | 2.0A/1.5A LDO REGULATOR |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| R1171S181A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:2.0A/1.5A LDO REGULATOR |
| R1171S191A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:2.0A/1.5A LDO REGULATOR |
| R1171S201A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:2.0A/1.5A LDO REGULATOR |
| R1171S211A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:2.0A/1.5A LDO REGULATOR |
| R1171S221A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:2.0A/1.5A LDO REGULATOR |
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