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SI91841DT-28-T1-E3 PDF预览

SI91841DT-28-T1-E3

更新时间： 2024-11-06 09:02:43
品牌 Logo 应用领域
威世 - VISHAY 光电二极管
页数 文件大小 规格书
10页 135K
描述
Regulator, 1 Output, CMOS, PDSO5,

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SI91841DT-28-T1-E3 数据手册

 浏览型号SI91841DT-28-T1-E3的Datasheet PDF文件第2页浏览型号SI91841DT-28-T1-E3的Datasheet PDF文件第3页浏览型号SI91841DT-28-T1-E3的Datasheet PDF文件第4页浏览型号SI91841DT-28-T1-E3的Datasheet PDF文件第5页浏览型号SI91841DT-28-T1-E3的Datasheet PDF文件第6页浏览型号SI91841DT-28-T1-E3的Datasheet PDF文件第7页 
Si91841  
Vishay Siliconix  
150-mA Ultra Low-Noise LDO Regulator  
With Discharge Option  
FEATURES  
D Ultra Low Dropout—130 mV at 150-mA Load  
D Output, Auto-Discharge In Shutdown Mode  
D Ultra Low Noise—30 mV(rms) (10-Hz to 100-kHz  
D Fixed 1.8, 2.5, 2.6, 2.8, 2.85, 2.9, 3.0, 3.3, 5.0-V Output  
Available  
Bandwidth)  
Voltage Options  
D Shutdown Control  
D Thin SOT23-5 Package  
D 110-mA Ground Current at 150-mA Load  
D 1.5% Guaranteed Output Voltage Accuracy  
D 300-mA Peak Output Current Capability  
D Uses Low ESR Ceramic Capacitors  
D Fast Start-Up (50 ms)  
APPLICATIONS  
D Cellular Phones, Wireless Handsets  
D Noise-Sensitive Electronic Systems, Laptop and  
D Fast Line and Load Transient Response (v 30 ms)  
D 1-mA Maximum Shutdown Current  
D Output Current Limit  
Palmtop Computers  
D PDAs  
D Pagers  
D Reverse Battery Protection  
D Digital Cameras  
D MP3 Player  
D Wireless Modem  
D Built-in Short Circuit and Thermal Protection  
DESCRIPTION  
The Si91841 is a 150-mA CMOS LDO (low dropout) voltage  
regulator. It is the perfect choice for low voltage, low power  
applications. An ultra low ground current makes this part  
attractive for battery operated power systems. The Si91841  
also offers ultra low dropout voltage to prolong battery life in  
portable electronics. Systems requiring a quiet voltage  
source, such as RF applications, will benefit from the  
Si91841’s ultra low output noise. An external noise bypass  
capacitor connected to the device’s BP pin can further reduce  
the noise level. The Si91841 is designed to maintain regulation  
while delivering 300-mA peak current, making it ideal for  
systems that have a high surge current upon turn-on.  
pull-down circuit is built into the Si91841 to clamp the output  
voltage when it rises beyond normal regulation. The Si91841  
automatically discharges the output voltage by connecting the  
output to ground through a 100-W n-channel MOSFET when  
the device is put in shutdown mode.  
The Si91841 features reverse battery protection to limit  
reverse current flow to approximately 1-mA in the event  
reversed battery is applied at the input, thus preventing  
damage to the IC.  
The Si91841 is available in both standard and lead (Pb)-free  
packages.  
For better transient response and regulation, an active  
TYPICAL APPLICATION CIRCUIT  
Si91841  
5
4
V
1
V
V
V
OUT  
IN  
IN  
OUT  
1 mF  
1 mF  
2
3
GND  
SD  
SD  
BP  
10 nF  
Thin SOT-23, 5-Lead  
Document Number: 71447  
S-50956—Rev. D, 16-May-05  
www.vishay.com  
1
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