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LP3981IMM-3.3/NOPB PDF预览

LP3981IMM-3.3/NOPB

更新时间： 2024-11-15 13:09:27
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德州仪器 - TI 线性稳压器IC调节器电源电路光电二极管输出元件
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LP3981IMM-3.3/NOPB 数据手册

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LP3981  
www.ti.com  
SNVS159G –OCTOBER 2001–REVISED MAY 2013  
LP3981 Micropower, 300mA Ultra Low-Dropout CMOS Voltage Regulator  
Check for Samples: LP3981  
1
FEATURES  
APPLICATIONS  
2
•
•
Small, Space Saving VSSOP-8  
•
•
•
•
•
CDMA Cellular Handsets  
Low Thermal Resistance in WSON-6 Package  
Gives Excellent Power Capability  
Wideband CDMA Cellular Handsets  
GSM Cellular Handsets  
•
•
Logic Controlled Enable  
Portable Information Appliances  
Tiny 3.3V ± 5% to 2.5V, 300mA Converter  
Stable with Ceramic and High Quality  
Tantalum Capacitors  
•
•
Fast Turn-On  
DESCRIPTION  
The LP3981's performance is optimized for battery  
powered systems to deliver ultra low noise, extremely  
low dropout voltage and low quiescent current.  
Regulator ground current increases only slightly in  
dropout, further prolonging the battery life.  
Thermal Shutdown and Short-Circuit Current  
Limit  
KEY SPECIFICATIONS  
•
•
•
•
•
2.5 to 6.0V Input Range  
300mA Output  
Power supply rejection is better than 60 dB at low  
frequencies. This high power supply rejection is  
maintained down to lower input voltage levels  
common to battery operated circuits.  
60dB PSRR at 1kHz  
≤1μA Quiescent Current when Shut Down  
Fast Turn-On Time: 120 μs (Typ.) with CBYPASS  
= 0.01uF  
The device is ideal for mobile phone and similar  
battery powered wireless applications. It provides up  
to 300 mA, from a 2.5V to 6V input, consuming less  
than 1µA in disable mode.  
•
•
•
132mV Typ Dropout with 300mA Load  
35μVrms Output Noise over 10Hz to 100kHz  
The LP3981 is available in VSSOP-8 package. For  
LP3981 in WSON-6 package, contact TI sales offices.  
Performance is specified for −40°C to +125°C  
temperature range. The device available in the  
following output voltages; 2.5V, 2.7V, 2.8V, 2.83V,  
3.0V, 3.03V and 3.3V as standard. Other output  
options can be made available, please contact your  
local TI sales office.  
−40 to +125°C Junction Temperature Range for  
Operation  
•
2.5V, 2.7V, 2.8V, 2.83V, 3.0V, 3.03V, and 3.3V  
Outputs Standard  
Typical Application Circuit  
Note: Pin Numbers in parenthesis indicate WSON-6 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 © 2001–2013, Texas Instruments Incorporated  
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LP3981IMM-3.3/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LP3981IMMX-3.3/NOPB TI

类似代替

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LP3981IMMX-3.3 TI

类似代替

 LP3981 Micropower, 300mA Ultra Low-Dropout CMOS Voltage Regulator
LP3981IMM-3.3 TI

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 LP3981 Micropower, 300mA Ultra Low-Dropout CMOS Voltage Regulator

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