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LP3986

更新时间： 2024-11-15 11:12:03
品牌 Logo 应用领域
德州仪器 - TI 稳压器
页数 文件大小 规格书
18页 605K
描述
具有使能功能的 300mA、双通道可调节超低压降稳压器

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LP3986 数据手册

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LP3986  
www.ti.com  
SNVS142U –AUGUST 2001–REVISED FEBRUARY 2013  
LP3986 Dual Micropower 150 mA Ultra Low-Dropout CMOS Voltage Regulators in DSBGA  
Package  
Check for Samples: LP3986  
1
FEATURES  
DESCRIPTION  
The LP3986 is a 150 mA dual low dropout regulator  
designed for portable and wireless applications with  
2
•
Miniature 8-I/O DSBGA Package  
•
Stable With 1µF Ceramic and High Quality  
Tantalum Output Capacitors  
demanding  
performance  
and  
board  
space  
requirements.  
•
•
•
•
Fast Turn-on  
The LP3986 is stable with a small 1 µF ±30%  
ceramic output capacitor requiring smallest possible  
board space.  
Two Independent Regulators  
Logic Controlled Enable  
Over Current and Thermal Protection  
The LP3986's performance is optimized for battery  
powered systems to deliver ultra low noise, extremely  
low dropout voltage and low quiescent current  
independent of load current. Regulator ground current  
increases very slightly in dropout, further prolonging  
the battery life. Optional external bypass capacitor  
reduces the output noise further without slowing down  
the load transient response. Fast start-up time is  
achieved by utilizing a speed-up circuit that actively  
pre-charges the bypass capacitor. Power supply  
rejection is better than 60 dB at low frequencies and  
55 dB at 10 kHz. High power supply rejection is  
maintained at low input voltage levels common to  
battery operated circuits.  
APPLICATIONS  
•
•
•
•
CDMA Cellular Handsets  
GSM Cellular Handsets  
Portable Information Appliances  
Portable Battery Applications  
The LP3986 is available in a DSBGA package.  
Performance is specified for a −40°C to +125°C  
temperature range. For single LDO applications,  
please refer to the LP3985 datasheet.  
Table 1. Key Specifications  
VALUE  
UNIT  
mA  
nA  
Guaranteed output current per regulator  
150  
Typical quiescent current when both regulators in shutdown mode  
Typical dropout voltage at 150 mA output current  
Typical ground current  
1
60  
mV  
µA  
115  
Typical output noise  
40  
µV  
Fast turn-on circuit  
200  
µs  
Junction temperature  
−40 to +125  
°C  
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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