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參數資料
| 型號： | SPX1587T-2.5 |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 3A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response |
| 中文描述： | 第3A低壓差線性穩(wěn)壓器可調節(jié) |
| 文件頁數： | 4/7頁 |
| 文件大小： | 187K |
| 代理商： | SPX1587T-2.5 |
Rev. 10/30/00
SPX1587
Basic Adjustable Regulator
Output Voltage
Consider Figure 2. The resistance R
1
generates a constant
current flow, normally the specified load current of 10mA.
This current will go through the resistance R
2
to set the overall
output voltage. The current I
ADJ
is very small and constant.
Therefore its contribution to the overall output voltage is very
small and can generally be ignored.
Load Regulation
Parasitic line resistance can degrade load regulation. In order
not to affect the behavior of the regulator, it is best to connect
directly the R
1
resistance from the resistor divider to the case,
and not to the load. For the same reason, it is best to connect
the resistor R
2
to the Negative side of the load.
Output Voltage
The fixed voltage LDO voltage regulators are simple to use
regulators since the V
OUT
is preset to the specifications. It is
important however, to provide the proper output capacitance
for stability and improvement. For most operating conditions
a capacitance of 22uF tantalum or 100uF electrolytic will
ensure stability and prevent oscillation.
SPX1587
Fig.2 Basic Adjustable Regulator
V
OUT
V
IN
V
REF
R
1
R
2
V
OUT
= V
REF
* ( 1 + R
2
/R
1
) + I
ADJ
* R
2
I
ADJ
50μA
SPX1587
Fig.3 Basic Adjustable Regulator
V
IN
R
2
R
1
Connect R
2
to Load
R
L
Connect R
to
Case of Regulator
R
Parasitic Line
Resistance
SPX1587
Basic Fixed Regulator
V
IN
5V
V
OUT
3.3V
C1
10uF
C2
10uF
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PDF描述 |
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| SPX1587T-3.3 | 3A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response |
| SPX1587T-5.0 | 3A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response |
| SPX1587U | 3A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response |
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| SPX1587U-2.5 | 3A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SPX1587T-3.3 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:3A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response |
| SPX1587T-3.3/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:3A Low Dropout Voltage Regulator |
| SPX1587T-3.3-TR | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| SPX1587T-5.0 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:3A Low Dropout Voltage Regulator |
| SPX1587T-5.0/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:3A Low Dropout Voltage Regulator |
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