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參數資料
| 型號： | LM3881MM |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 模擬信號調理 |
| 英文描述： | Power Sequencer |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO8 |
| 封裝： | MSOP-8 |
| 文件頁數： | 1/14頁 |
| 文件大小： | 218K |
| 代理商： | LM3881MM |
February 6, 2008
LM3881
Power Sequencer
General Description
The LM3881 Power Sequencer offers the easiest method to
control power up and power down of multiple power supplies
(switching or linear regulators). By staggering the startup se-
quence, it is possible to avoid latch conditions or large in-rush
currents that can affect the reliability of the system.
Available in MSOP-8 package, the Power Sequencer con-
tains a precision enable pin and three open drain output flags.
Upon enabling the LM3881, the three output flags will se-
quentially release, after individual time delays, permitting the
connected power supplies to startup. The output flags will fol-
low a reverse sequence during power down to avoid latch
conditions. Time delays are defined using an external capac-
itor and the output flag states can be inverted by the user.
Features
■
Easiest method to sequence rails
■
Power up and power down control
■
Input voltage range of 2.7V to 5.5V
■
Small footprint MSOP-8 package
■
Low quiescent current of 80 μA
■
Output invert feature
■
Timing controlled by small value external capacitor
Applications
■
Multiple Supply Sequencing
■
Microprocessor / Microcontroller Sequencing
■
FPGA Sequencing
Typical Application Circuit
30048401
2008 National Semiconductor Corporation
300484
www.national.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM3881MM/NOPB | 功能描述:監控電路 POWER SEQUENCER RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| LM3881MME | 制造商:Texas Instruments 功能描述:Power Sequencer T/R |
| LM3881MME/NOPB | 功能描述:監控電路 RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| LM3881MME-NOPB | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LM3881 Power Sequencer |
| LM3881MM-NOPB | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LM3881 Power Sequencer |
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