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LP2985IM5-50 PDF预览

LP2985IM5-50

更新时间: 2024-11-22 23:47:43
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其他 - ETC 稳压器
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14页 481K
描述
IC-SM LDO REGULATOR

LP2985IM5-50 数据手册

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October 1999  
LP2985  
Micropower SOT, 150 mA Low-Noise Ultra Low-Dropout  
Regulator  
Designed for Use with Very Low ESR Output Capacitors  
General Description  
The LP2985 is a 150 mA, fixed-output voltage regulator de-  
signed to provide ultra low-dropout and low noise in battery  
powered applications.  
Features  
n Ultra low dropout voltage  
n Guaranteed 150 mA output current  
n Smallest possible size (SOT-23, micro SMD package)  
n Requires minimum external components  
n Stable with low-ESR output capacitor  
Using an optimized VIP (Vertically Integrated PNP) pro-  
cess, the LP2985 delivers unequalled performance in all  
specifications critical to battery-powered designs:  
<
n
1 µA quiescent current when shut down  
@
Dropout Voltage: Typically 300 mV  
150 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  
@
7 mV 1 mA load.  
@
Ground Pin Current: Typically 850 µA 150 mA load, and  
@
75 µA 1 mA load.  
Enhanced Stability: The LP2985 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 package uses 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 2.5V to 5.0V, are available as  
standard products. Consult factory for custom voltages.  
Block Diagram  
DS100140-1  
VIP is a trademark of National Semiconductor Corporation.  
© 1999 National Semiconductor Corporation  
DS100140  
www.national.com  

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