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LP3883

更新时间： 2024-11-17 02:58:23
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德州仪器 - TI /
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3A Fast-Response Ultra Low Dropout Linear Regulators

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LP3883 数据手册

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LP3883  
www.ti.com  
SNVS223F –NOVEMBER 2002–REVISED APRIL 2013  
LP3883 3A Fast-Response Ultra Low Dropout Linear Regulators  
Check for Samples: LP3883  
1
FEATURES  
DESCRIPTION  
The LP3883 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 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.  
2
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Ultra Low Dropout Voltage (210 mV @ 3A typ)  
Low Ground Pin Current  
Load Regulation of 0.04%/A  
60 nA Typical Quiescent Current in Shutdown  
1.5% Output Accuracy (25°C)  
TO-220, DDPAK/TO-263 Packages  
Over Temperature/over Current Protection  
−40°C to +125°C Junction Temperature Range  
APPLICATIONS  
•
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•
DSP Power Supplies  
Server Core and I/O Supplies  
Linear Power Supplies for PC Add-in-Cards  
Set-Top Box Power Supplies  
Microprocessor Power Supplies  
High Efficiency Linear Power Supplies  
SMPS Post-Regulators  
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.  
Dropout Voltage: 210 mV (typ) @ 3A 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  
accuracy.  
Typical Application Circuit  
At least 4.7 µF of input and output capacitance is required for stability.  
Connection Diagram  
Figure 1. TO-220, Top View  
See NDH0005D Package  
Figure 2. DDPAK/TO-263, Top View  
See KTT0005B Package  
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 © 2002–2013, Texas Instruments Incorporated  
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