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參數(shù)資料
| 型號： | LP3990TLX-2.8 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | CLAMP |
| 中文描述： | 2.8 V FIXED POSITIVE REGULATOR, PBGA4 |
| 封裝： | 1 X 1.30 MM, MICRO, SMD-4 |
| 文件頁數(shù)： | 11/13頁 |
| 文件大小： | 711K |
| 代理商： | LP3990TLX-2.8 |
Application Hints
(Continued)
tantalum will increase about 2:1 as the temperature goes
from 25C down to -40C, so some guard band must be
allowed.
ENABLE CONTROL
The LP3990 features an active high Enable pin, V
, which
turns the device on when pulled high. When not enabled the
regulator output is off and the device typically consumes
2nA.
If the application does not require the Enable switching
feature, the V
pin should be tied to V
IN
to keep the
regulator output permanently on.
To ensure proper operation, the signal source used to drive
the V
input must be able to swing above and below the
specified turn-on/off voltage thresholds listed in the Electrical
Characteristics section under V
IL
and V
IH
.
Micro SMD MOUNTING
The micro SMD package requires specific mounting tech-
niques, which are detailed in National Semiconductor Appli-
cation Note AN-1112.
For best results during assembly, alignment ordinals on the
PC board may be used to facilitate placement of the micro
SMD device.
Micro SMD LIGHT SENSITIVITY
Exposing the micro SMD device to direct light may affect the
operation of the device. Light sources, such as halogen
lamps, can affect electrical performance, if placed in close
proximity to the device.
Light with wavelengths in the infra-red portion of the spec-
trum is the most detrimental, and so, fluorescent lighting
used inside most buildings, has little or no effect on perfor-
mance.
L
www.national.com
11
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP3991TL-0.8/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(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 |
| LP3991TL-1.2 | 制造商:Texas Instruments 功能描述:LDO Regulator Pos 1.2V 0.3A 4-Pin uSMD T/R 制造商:Texas Instruments 功能描述:V REG, LDO, 300MA 1.2V, MICRO SMD-4 制造商:Texas Instruments 功能描述:V REG, LDO, 300MA 1.2V, MICRO SMD-4; Primary Input Voltage:1.7V; Output Voltage Fixed:1.2V; Dropout Voltage Vdo:75mV; Voltage Regulator Case Style:Bump; No. of Pins:4; Output Current:300mA; Operating Temperature Min:-40C; Operating;RoHS Compliant: Yes |
| LP3991TL-1.2/NOPB | 功能描述:低壓差穩(wěn)壓器 - LDO 300Ma Low Vin 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(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 |
| LP3991TL-1.2EV | 功能描述:電源管理IC開發(fā)工具 LP3991TL EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LP3991TL-1.3 | 制造商:Texas Instruments 功能描述:LDO Regulator Pos 1.3V 0.3A 4-Pin uSMD T/R |
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