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參數(shù)資料
| 型號： | LP2980IM5-3.8 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Micropower 50 mA Ultra Low-Dropout Regulator |
| 中文描述： | 3.8 V FIXED POSITIVE LDO REGULATOR, 0.225 V DROPOUT, PDSO5 |
| 封裝： | SOT-23, 5 PIN |
| 文件頁數(shù)： | 15/18頁 |
| 文件大?。?/td> | 423K |
| 代理商： | LP2980IM5-3.8 |
Typical Applications
(Continued)
brought low, the converter will be in shutdown, and will draw
less than 1 μA from the source.
Notes:
A. Drive this input with a logic signal (see Application Hints).
If the shutdown function is not to be used, tie the ON/OFF
pin directly to the V
IN
pin.
B. Capacitor is required for regulator stability. Minimum size
is shown, and may be increased without limit.
C. Increasing the output capacitance improves transient re-
sponse and increases phase margin.
D. A heatsink may be required for this transistor. The maxi-
mum allowable value for thermal resistance of the heatsink
is dependent on ambient temperature and load current (see
curves in ). Once the value is obtained from the graph, a
heatsink must be selected which has a thermal resistance
equal to or lower than this value. If the value is above
60C/W, no heatsink is required (the TO-220 package alone
will safely dissipate this).
For these curves, a maximum junction temperature of 150C
is assumed for the pass transistor. The case-to-heatsink at-
tachment thermal resistance is assumed to be 1.5C/W. All
calculations are for 5.5V input voltage (which is worst-case
for power dissipation).
DS012078-54
FIGURE 8. Heatsink Thermal Resistance Requirements
for
Figure 7
L
www.national.com
15
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| LP2980IM5-4.5 | Micropower 50 mA Ultra Low-Dropout Regulator |
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| LP2980IM5-ADJ | Micropower SOT, 50 mA Ultra Low-Dropout Adjustable Voltage Regulator |
| LP2980IM5X-2.5 | LinCMOS(TM) Precision Quad Operational Amplifier 14-SOIC -40 to 85 |
| LP2980IM5X-2.6 | Micropower 50 mA Ultra Low-Dropout Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP2980IM5-4.5 | 制造商:Rochester Electronics LLC 功能描述:50MA MICROPWR SOT-23 ULTRA LDO - Bulk |
| LP2980IM5-4.5/NOPB | 制造商:Texas Instruments 功能描述:LDO Regulator Pos 4.5V 0.05A 5-Pin SOT-23 T/R |
| LP2980IM5-4.7 | 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(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 |
| LP2980IM5-4.7/NOPB | 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(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 |
| LP2980IM5-5.0 | 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(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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