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参数资料
| 型号： | SPX2931AM1-L-3.0 |
| 元件分类： | 固定正电压单路输出LDO稳压器 |
| 英文描述： | 3 V FIXED POSITIVE LDO REGULATOR, 0.6 V DROPOUT, PSSO3 |
| 封装： | SOT-89, 3 PIN |
| 文件页数： | 3/7页 |
| 文件大小： | 147K |
| 代理商： | SPX2931AM1-L-3.0 |
Rev. 10/24/00
SPX2931
Application Hints
The SPX2931 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 only bench
testing is the only means to determine the proper capacitor
type and value.
The high quality 100
F aluminum
electrolytic covers all general application circuits, this stability
can be obtained with a tantalum electrolytic value of 47
F.
Another critical point of electrolytic characteristics is its
performance over temperature. The SPX2931 is designed to
operate starting at -40
°C which may not be true in the case of
electrolytic. Higher temperatures generally no problem. The
electrolytic. type in aluminum will freeze around -30
°C. This
could cause an oscillation at output of regulator. At a lower
temperature requirement by many applications the capacitor
should maintain its performance.
So as a result, for an
application which regulator junction temperature does not
exceed 25
°C, the output capacitor can be reduced by the
factor of two over the value needed for the entire
temperature range.
Other points with linear regulators is that the twitch higher
output current stability decreases. In most applications the
SPX2931 is operating 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 100 mA.
With the SPX2931 adjustable regulator, the minimum value
of output capacitance is a function of the output voltage.
The value decreases with higher output voltages, since the
internal loop gain is reduced.
The worst case occurs at the lower temperature and
maximum operating currents, the entire circuit and the
electrolytic, should be cooled down to the minimum
temperature. The minimum of 0.6 volts required at the input
of regulator above the output to keep the power dissipation
and die heating to its minimum. After the value for the
capacitor has been determined for actual use, the value
should be doubled.
相关PDF资料 |
PDF描述 |
|---|---|
| SPX2931AN-L-3.0 | 3 V FIXED POSITIVE LDO REGULATOR, 0.6 V DROPOUT, PBCY3 |
| SPX2931AU-L | ADJUSTABLE POSITIVE LDO REGULATOR, 0.6 V DROPOUT, PSFM3 |
| SPX2931AU-L-3.3 | 3.3 V FIXED POSITIVE LDO REGULATOR, 0.6 V DROPOUT, PSFM3 |
| SPX2931AU-L-3.5 | 3.5 V FIXED POSITIVE LDO REGULATOR, 0.6 V DROPOUT, PSFM3 |
| SPX2931CM1-L | ADJUSTABLE POSITIVE LDO REGULATOR, 0.6 V DROPOUT, PSSO3 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SPX2931AN | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:100mA Low Dropout Voltage Regulator |
| SPX2931AN-3.0 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:100mA Low Dropout Voltage Regulator |
| SPX2931AN-3.3 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:100mA Low Dropout Voltage Regulator |
| SPX2931AN-3.3/TR | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:100mA Low Dropout Voltage Regulator |
| SPX2931AN-3.5 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:100mA Low Dropout Voltage Regulator |
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