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LP2992ILD-1.5

更新时间: 2024-11-05 22:11:55
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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
15页 596K
描述
Micropower 250 mA Low-Noise Ultra Low-Dropout Regulator in SOT-23 and LLP Packages Designed for Use with Very Low ESR Output Capacitors

LP2992ILD-1.5 数据手册

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June 2002  
LP2992  
Micropower 250 mA Low-Noise Ultra Low-Dropout  
Regulator in SOT-23 and LLP Packages  
Designed for Use with Very Low ESR Output Capacitors  
General Description  
Features  
n Ultra low dropout voltage  
The LP2992 is a 250 mA, fixed-output voltage regulator  
designed to provide ultra low-dropout and low noise in bat-  
tery powered applications.  
n Guaranteed 250 mA output current  
n Smallest possible size (SOT-23, LLP package)  
n Requires minimum external components  
n Stable with low-ESR output capacitor  
Using an optimized VIP (Vertically Integrated PNP) pro-  
cess, the LP2992 delivers unequalled performance in all  
specifications critical to battery-powered designs:  
<
n
1 µA quiescent current when shut down  
@
Dropout Voltage: Typically 450 mV  
250 mA load, and  
n Low ground pin current at all loads  
n Output voltage accuracy 1% (A Grade)  
n High peak current capability  
n Wide supply voltage range (16V max)  
n Low ZOUT: 0.3typical (10 Hz to 1 MHz)  
n Overtemperature/overcurrent protection  
n −40˚C to +125˚C junction temperature range  
n Custom voltages available  
@
5 mV 1 mA load.  
@
Ground Pin Current: Typically 1500 µA 250 mA load, and  
@
75 µA 1 mA load.  
Enhanced Stability: The LP2992 is stable with output ca-  
pacitor ESR as low as 5 m, which allows the use of ceramic  
capacitors on the output.  
Sleep Mode: Less than 1 µA quiescent current when  
ON/OFF pin is pulled low.  
Smallest Possible Size: SOT-23 and LLP packages use  
absolute minimum board space.  
Applications  
n Cellular Phone  
Precision Output: 1% tolerance output voltages available  
(A grade).  
n Palmtop/Laptop Computer  
n Personal Digital Assistant (PDA)  
n Camcorder, Personal Stereo, Camera  
Low Noise: By adding a 10 nF bypass capacitor, output  
noise can be reduced to 30 µV (typical).  
Multiple voltage options, from 1.5V to 5.0V, are available as  
standard products. Consult factory for custom voltages.  
Block Diagram  
20029401  
VIP is a trademark of National Semiconductor Corporation.  
© 2002 National Semiconductor Corporation  
DS200294  
www.national.com  

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