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參數(shù)資料
| 型號： | LP38691 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 500mA Low Dropout CMOS Linear Regulators Stable with Ceramic Output Capacitors |
| 中文描述： | 500mA的低壓降CMOS線性穩(wěn)壓器采用陶瓷輸出電容器穩(wěn)定 |
| 文件頁數(shù)： | 13/15頁 |
| 文件大小： | 793K |
| 代理商： | LP38691 |
Application Hints
(Continued)
OUTPUT NOISE
Noise is specified in two ways:
Spot Noise
or
Output Noise
Density
is the RMS sum of all noise sources, measured at
the regulator output, at a specific frequency (measured with
a 1Hz bandwidth). This type of noise is usually plotted on a
curve as a function of frequency.
Total Output Noise
or
Broad-Band Noise
is the RMS sum of spot noise over a
specified bandwidth, usually several decades of frequencies.
Attention should be paid to the units of measurement. Spot
noise is measured in units μV/root-Hz or nV/root-Hz and total
output noise is measured in μV(rms)
The primary source of noise in low-dropout regulators is the
internal reference. Noise can be reduced in two ways: by
increasing the transistor area or by increasing the current
drawn by the internal reference. Increasing the area will
decrease the chance of fitting the die into a smaller package.
Increasing the current drawn by the internal reference in-
creases the total supply current (ground pin current).
L
www.national.com
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相關PDF資料 |
PDF描述 |
|---|---|
| LP38691DT-1.8 | 500mA Low Dropout CMOS Linear Regulators Stable with Ceramic Output Capacitors |
| LP38691DT-2.5 | 500mA Low Dropout CMOS Linear Regulators Stable with Ceramic Output Capacitors |
| LP38691DT-3.3 | 500mA Low Dropout CMOS Linear Regulators Stable with Ceramic Output Capacitors |
| LP38691DT-5.0 | 500mA Low Dropout CMOS Linear Regulators Stable with Ceramic Output Capacitors |
| LP38691DTX-1.8 | 500mA Low Dropout CMOS Linear Regulators Stable with Ceramic Output Capacitors |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP38691-ADJ | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:500mA Low Dropout CMOS Linear Regulators with Adjustable Output / Stable with Ceramic Output Capacitors |
| LP38691-ADJ_10 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:500mA Low Dropout CMOS Linear Regulators with Adjustable Output Stable with Ceramic Output Capacitors |
| LP38691DT-1.8 | 功能描述:低壓差穩(wěn)壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP38691DT-1.8/NOPB | 功能描述:低壓差穩(wěn)壓器 - LDO 500MA LDO CMOS LINEAR REG RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP38691DT-2.5 | 功能描述:低壓差穩(wěn)壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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