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LP3891ES-1.8 PDF预览

LP3891ES-1.8

更新时间： 2024-01-04 20:13:05
品牌 Logo 应用领域
美国国家半导体 - NSC /
页数 文件大小 规格书
12页 305K
描述
0.8A Fast-Response Ultra Low Dropout Linear

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中文翻译

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LP3891ES-1.8 技术参数

生命周期：Obsolete零件包装代码：D2PAK
包装说明：TO-263,针数：4
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：1 week
风险等级：5.67最大回动电压 1：0.4 V
最大输入电压：5.5 V最小输入电压：2.2 V
JESD-30 代码：R-PSSO-G5长度：10.16 mm
功能数量：1端子数量：5
工作温度TJ-Max：125 °C工作温度TJ-Min：-40 °C
最大输出电流 1：0.8 A最大输出电压 1：1.854 V
最小输出电压 1：1.746 V标称输出电压 1：1.8 V
封装主体材料：PLASTIC/EPOXY封装代码：TO-263
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
调节器类型：FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR座面最大高度：4.8 mm
表面贴装：YES技术：CMOS
端子形式：GULL WING端子节距：1.7 mm
端子位置：SINGLE宽度：8.64 mm

LP3891ES-1.8 数据手册

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September 2003  
LP3891  
0.8A Fast-Response Ultra Low Dropout Linear  
Regulators  
General Description  
Features  
@
n Ultra low dropout voltage (100mV 0.8A typ)  
The LP3891 is a high current, fast response 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 regula-  
tors, the CMOS architectutre consumes extremely low qui-  
escent current at any output load current. The use of an  
n Low ground pin current  
n Load regulation of 0.04%/A  
n 60 nA typical quiescent current in shutdown  
n 1.5% output accuracy (25˚C)  
n TO-220, TO-263 packages  
n Over temperature/over current protection  
n −40˚C to +125˚C junction temperature range  
N-MOS power transistor results in wide bandwidth, yet mini- Applications  
mum external capacitance is required to maintain loop sta-  
bility.  
n DSP Power Supplies  
n Server Core and I/O Supplies  
n PC Add-in-Cards  
n Local Regulators in Set-Top Boxes  
n Microcontroller Power Supplies  
n High Efficiency Power Supplies  
n SMPS Post-Regulators  
The fast transient response of these devices makes them  
suitable for use in powering DSP, Microcontroller Core volt-  
ages and Switch Mode Power Supply post regulators. The  
parts are available in TO-220 and TO-263 packages.  
@
Dropout Voltage: 100 mV (typ) 0.8A load current.  
Ground Pin Current: 3 mA (typ) at full load.  
Shutdown Current: 60 nA (typ) when S/D pin is low.  
Precision Output Voltage: 1.5% room temperature accu-  
racy.  
Typical Application Circuit  
20069501  
At least 10 µF of input and output capacitance is required for stability.  
*Tantalum capacitors are recommended. Aluminum electrolytic capacitors may be used for restricted temperature range. See application hints.  
Connection Diagrams  
20069502  
20069503  
TO-220, Top View  
TO-263, Top View  
© 2003 National Semiconductor Corporation  
DS200695  
www.national.com  
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