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參數(shù)資料
| 型號(hào)： | LP2951A |
| 廠商： | Semtech Corporation |
| 英文描述： | 150mA Adjustable Voltage Regulators(低壓差，5V固定輸出或可調(diào)輸出(1.24-29V)，150mA穩(wěn)壓器) |
| 中文描述： | 150mA的可調(diào)穩(wěn)壓器（低壓差，5V的固定輸出或可調(diào)輸出（1.24 - 29V），150mA的穩(wěn)壓器） |
| 文件頁數(shù)： | 6/7頁 |
| 文件大?。?/td> | 175K |
| 代理商： | LP2951A |
6
2001 Semtech Corp.
www.semtech.com
LP2951A
POWER MANAGEMENT
This can be done by bypassing the upper resistor in the
feedback divider with a small capacitor to provide a more
direct path for AC feedback. The size of this capacitor
can be calculated from the formula:
C
BYPASS =
corner
1f
R
2
1
π
where R1 is the upper resistor of the feedback divider
and f
corner is the frequency above which the increased AC
feedback is to become active. Because the gain of the
error amplifier in the LP2951(A) begins to roll off at about
300Hz, this is generally an optimum choice for corner
frequency.
The reduction of the output noise will be proportional to
the ratio of the two resistors in the feedback divider:
2
R
1
R
1
R
+
and will increase at a rate of 20 dB per decade at
frequencies above the corner frequency chosen, up to
the frequency where the error amplifiers gain has rolled
off to 1 (~100kHz). In order to maintain regulator
stability when using a noise-reducing bypass capacitor, it
will also be necessary to increase the size of the output
filter capacitor by the ratio:
Applications Information (Cont.)
2
R
1
R
1
R
+
相關(guān)PDF資料 |
PDF描述 |
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| LP2951CS-L-3.3 | FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, 0.45 V DROPOUT, PDSO8 |
| LP2951CS-L-5.0 | FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, 0.45 V DROPOUT, PDSO8 |
| LP2985AITPX-2.8/NOPB | 2.8 V FIXED POSITIVE LDO REGULATOR, 0.575 V DROPOUT, PBGA5 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP2951AC | 制造商:Alpha & Omega Semiconductor 功能描述: 制造商:Alpha & Omega Semiconductor 功能描述:Electronic Component |
| LP2951ACD | 功能描述:低壓差穩(wěn)壓器 - LDO 1.23-30V or 5V 100mA 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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP2951ACD3.0 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:100 mA, Low Power Low Dropout Voltage Regulator |
| LP2951ACD-3.0 | 功能描述:低壓差穩(wěn)壓器 - LDO 3V 100mA Low Power 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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP2951ACD-3.0G | 功能描述:低壓差穩(wěn)壓器 - LDO 3V 100mA Low Power w/Error Flag Output 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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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