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LP38841

更新时间： 2024-09-27 11:11:47
品牌 Logo 应用领域
德州仪器 - TI 稳压器
页数 文件大小 规格书
19页 1457K
描述
具有使能功能的 800mA、低输入电压 (0.875V)、超低压降稳压器

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中文翻译

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LP38841 数据手册

 浏览型号LP38841的Datasheet PDF文件第2页浏览型号LP38841的Datasheet PDF文件第3页浏览型号LP38841的Datasheet PDF文件第4页浏览型号LP38841的Datasheet PDF文件第5页浏览型号LP38841的Datasheet PDF文件第6页浏览型号LP38841的Datasheet PDF文件第7页 
LP38841  
www.ti.com  
SNVS289C –DECEMBER 2004–REVISED APRIL 2013  
LP38841 0.8A Ultra Low Dropout Linear Regulators  
Stable with Ceramic Output Capacitors  
Check for Samples: LP38841  
1
FEATURES  
DESCRIPTION  
The LP38841 is a high current, fast response  
2
•
•
Ideal for Conversion from 1.8V or 1.5V Inputs  
regulator which can maintain output voltage  
regulation with minimum input to output voltage drop.  
Fabricated on a CMOS process, the device operates  
from two input voltages: Vbias provides voltage to  
drive the gate of the N-MOS power transistor, while  
Vin is the input voltage which supplies power to the  
load. The use of an external bias rail allows the part  
to operate from ultra low Vin voltages. Unlike bipolar  
regulators, the CMOS architecture consumes  
extremely low quiescent current at any output load  
current. The use of an N-MOS power transistor  
results in wide bandwidth, yet minimum external  
capacitance is required to maintain loop stability.  
Designed for Use with low ESR Ceramic  
Capacitors  
•
0.8V, 1.2V and 1.5V Standard Voltages  
Available  
•
•
•
•
•
•
•
Ultra Low Dropout Voltage (75mV at 0.8A typ)  
1.5% Initial Output Accuracy  
Load Regulation of 0.1%/A (typical)  
30nA Quiescent Current in Shutdown (typical)  
Low Ground Pin Current at all Loads  
Over Temperature/over Current Protection  
Available in 5 Lead TO-220 and DDPAK/TO-263  
Packages  
The fast transient response of these devices makes  
them suitable for use in powering DSP,  
Microcontroller Core voltages and Switch Mode  
Power Supply post regulators. The parts are available  
in TO-220 and DDPAK/TO-263 packages.  
•
−40°C to +125°C Junction Temperature Range  
APPLICATIONS  
Dropout Voltage: 75 mV (typ) at 0.8A load current.  
Quiescent Current: 30 mA (typ) at full load.  
•
ASIC Power Supplies In:  
–
Desktops, Notebooks, and Graphics Cards,  
Servers  
Shutdown Current: 30 nA (typ) when S/D pin is low.  
–
Gaming Set Top Boxes, Printers and  
Copiers  
Precision Output Voltage: 1.5% room temperature  
accuracy.  
•
•
•
Server Core and I/O Supplies  
DSP and FPGA Power Supplies  
SMPS Post-Regulator  
TYPICAL APPLICATION CIRCUIT  
LP38841  
IN  
OUT  
S/D  
IN  
OUT  
10 mF  
Ceramic  
4.7 mF*  
BIAS  
5V ± 10%  
BIAS  
S/D  
GND  
0.1 mF  
GND  
GND  
* Minimum value required if Tantalum capacitor is used (see Application Hints).  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
2
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2004–2013, Texas Instruments Incorporated  
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LP38841 替代型号

型号 品牌 替代类型 描述 数据表
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