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參數(shù)資料
| 型號： | SPX8863M5-3.0 |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 120 mA, Low Dropout Voltage Regulator |
| 中文描述： | 120毫安，低壓差穩(wěn)壓器 |
| 文件頁數(shù)： | 4/9頁 |
| 文件大小： | 187K |
| 代理商： | SPX8863M5-3.0 |
Rev. 10/24/00
V
OUT
GND
SPX8863
Top View
EN
BYP
(Optn)
V
IN
+
+
Fig. 1
Hi-ON
Lo-OFF
3
2
1
4
5
SPX8863
Application Hints
The SPX8863 requires an output capacitor for device stability.
The value required varies greatly depending upon the
application circuit and other factors. The high frequency
characteristics of electrolytic capacitors depend greatly on the
type and also on the manufacturer. Sometimes bench testing is
the only means to determine the proper capacitor type and
value. The high quality 2.2
μ
F aluminum electrolytic capacitor
covers all general application circuits, this stability can be
obtained with a tantalum electrolytic value of 1
μ
F.
In general, linear regulator stability decreases with higher
output currents. In some applications the SPX8863 may
operate at few milliamps. In these applications the output
capacitance can be further reduced. For example, when the
regulator is running at 10mA output current the output
capacitance value is half compared to the same regulator
that is running at 150mA.
With the SPX8863 adjustable regulator, the minimum value
of output capacitance is a function of the output voltage.
The value decreases with higher output voltages, since the
closed loop gain is increased.
Typical Applications Circuits
The SPX8863 provides access to the internal reference. A 10
μ
F capacitor on the BYP pin will provide a significant reduction in
output noise. This pin may be left unconnected if the output noise is not a major concern. The SPX8863 start-up speed is inversely
proportional to the size of its capacitor. Applications requiring a slow ramp-up of output voltage should consider larger values of
C
BYP
. If the rapid turn-ON is necessary, omit bypass capacitor.
Figure 1 shows SPX8863 standard application circuit. The EN (enable) pin is pulled high (>2.0V) to enable the regulator. To disable
the regulator, EN < 0.6V.
The SPX8863 in figure 2 shows adjustable output voltage configuration. Two resistors set the output voltage. The formula for output
voltage is:
Resistor values are not critical as the Adj. pin has high input impedance, for best results use resistors of 47k
or less. A capacitor for
Adj to ground will provide improved noise performance.
V
OUT
= 1.235V x (1+ R1)
R2
V
IN
V
OUT
GND
Top View
EN
Byp
(Optn)
+
+
ADJ
R1
R2
Fig. 2
Hi-ON
Lo-OFF
SPX8863
1
2
3
4
5
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SPX8863M5-3.3 | 120 mA, Low Dropout Voltage Regulator |
| SPX8863M5-4.0 | 120 mA, Low Dropout Voltage Regulator |
| SPX8863M5-4.5 | 120 mA, Low Dropout Voltage Regulator |
| SPX8863M5-5.0 | 120 mA, Low Dropout Voltage Regulator |
| SPX8863 | 120 mA, Low Dropout Voltage Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SPX8863M5-4.0 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:120 mA, Low Dropout Voltage Regulator |
| SPX8863M5-4.5 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:120 mA, Low Dropout Voltage Regulator |
| SPX8863M5-5.0 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:120 mA, Low Dropout Voltage Regulator |
| SPXA-001T-P0.6 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Crimping tools and machines |
| SPXB5617 | 制造商:Bomar Interconnect Products Inc 功能描述: |
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