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LP2989ILD-3.6 PDF预览

LP2989ILD-3.6

更新时间： 2024-11-22 22:24:15
品牌 Logo 应用领域
美国国家半导体 - NSC 稳压器调节器电容器光电二极管输出元件
页数 文件大小 规格书
19页 614K
描述
Micropower/Low Noise, 500 mA Ultra Low-Dropout Regulator For Use with Ceramic Output Capacitors

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LP2989ILD-3.6 数据手册

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June 2002  
LP2989  
Micropower/Low Noise, 500 mA Ultra Low-Dropout  
Regulator  
For Use with Ceramic Output Capacitors  
General Description  
Features  
n Ultra low dropout voltage  
The LP2989 is a fixed-output 500 mA precision LDO regu-  
lator designed for use with ceramic output capacitors.  
n Guaranteed 500 mA continuous output current  
n Very low output noise with external capacitor  
n SO-8, Mini SO-8, 8 Lead LLP surface mount packages  
Output noise can be reduced to 18µV (typical) by connecting  
an external 10 nF capacitor to the bypass pin.  
<
n
0.8 µA quiescent current when shutdown  
™
Using an optimized VIP (Vertically Integrated PNP) pro-  
cess, the LP2989 delivers superior performance:  
n Low ground pin current at all loads  
n 0.75% output voltage accuracy (“A” grade)  
n High peak current capability (800 mA typical)  
n Wide supply voltage range (16V max)  
n Overtemperature/overcurrent protection  
n −40˚C to +125˚C junction temperature range  
@
Dropout Voltage: Typically 310 mV 500 mA load, and 1  
@
mV 100 µA load.  
@
Ground Pin Current: Typically 3 mA 500 mA load, and  
@
110 µA 100 µA load.  
Sleep Mode: The LP2989 draws less than 0.8 µA quiescent  
current when shutdown pin is pulled low.  
Applications  
Error Flag: The built-in error flag goes low when the output  
drops approximately 5% below nominal.  
n Notebook/Desktop PC  
n PDA/Palmtop Computer  
n Wireless Communication Terminals  
n SMPS Post-Regulator  
Precision Output: Guaranteed output voltage accuracy is  
0.75% (“A” grade) and 1.25% (standard grade) at room  
temperature.  
<
For output voltages 2V, see LP2989LV datasheet.  
Block Diagram  
10133901  
™
VIP is a trademark of National Semiconductor Corporation.  
© 2002 National Semiconductor Corporation  
DS101339  
www.national.com  
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