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LP3966

更新时间: 2024-11-16 02:58:35
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3A Fast Ultra Low Dropout Linear Regulators

LP3966 数据手册

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LP3963, LP3966  
www.ti.com  
SNVS067H APRIL 2000REVISED APRIL 2013  
LP3963/LP3966 3A Fast Ultra Low Dropout Linear Regulators  
Check for Samples: LP3963, LP3966  
1
FEATURES  
DESCRIPTION  
The LP3963/LP3966 series of fast ultra low-dropout  
linear regulators operate from a +2.5V to +7.0V input  
supply. Wide range of preset output voltage options  
are available. These ultra low dropout linear  
regulators respond very quickly to step changes in  
load which makes them suitable for low voltage  
microprocessor applications. The LP3963/LP3966 are  
developed on a CMOS process which allows low  
quiescent current operation independent of output  
load current. This CMOS process also allows the  
LP3963/LP3966 to operate under extremely low  
dropout conditions.  
2
Ultra Low Dropout Voltage  
Low Ground Pin Current  
Load Regulation of 0.06%  
15µA Quiescent Current in Shutdown Mode  
Specified Output Current of 3A DC  
Available in DDPAK/TO-263 and TO-220  
Packages  
Output Voltage Accuracy ± 1.5%  
Error Flag Indicates Output Status (LP3963)  
Sense Option Improves Load Regulation  
(LP3966)  
Dropout Voltage: Ultra low dropout voltage; typically  
80mV at 300mA load current and 800mV at 3A load  
current.  
Minimum Output Capacitor Requirements  
Overtemperature/Overcurrent Protection  
40°C to +125°C Junction Temperature Range  
Ground Pin Current: Typically 6mA at 3A load  
current.  
Shutdown Mode: Typically 15µA quiescent current  
when the shutdown pin is pulled low.  
APPLICATIONS  
Microprocessor Power Supplies  
GTL, GTL+, BTL, and SSTL Bus Terminators  
Power Supplies for DSPs  
SCSI Terminator  
Error Flag: Error flag goes low when the output  
voltage drops 10% below nominal value (for LP3963).  
SENSE: Sense pin improves regulation at remote  
loads. (For LP3966)  
Post Regulators  
Precision Output Voltage: Multiple output voltage  
options are available ranging from 1.2V to 5.0V and  
adjustable (LP3966), with a specified accuracy of  
±1.5% at room temperature, and ±3.0% over all  
conditions (varying line, load, and temperature).  
High Efficiency Linear Regulators  
Battery Chargers  
Other Battery Powered Applications  
Typical Application Circuits  
*SD and ERROR pins must be pulled high through a 10kpull-up resistor. Connect the ERROR pin to ground if this  
function is not used. See Application Hints for more information.  
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 © 2000–2013, Texas Instruments Incorporated  

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