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LTC2904

更新时间： 2023-12-20 18:45:47
品牌 Logo 应用领域
亚德诺 - ADI 监视器
页数 文件大小 规格书
16页 156K
描述
具引脚可选门限的精准双路电源监视器

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中文翻译

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LTC2904 数据手册

 浏览型号LTC2904的Datasheet PDF文件第2页浏览型号LTC2904的Datasheet PDF文件第3页浏览型号LTC2904的Datasheet PDF文件第4页浏览型号LTC2904的Datasheet PDF文件第5页浏览型号LTC2904的Datasheet PDF文件第6页浏览型号LTC2904的Datasheet PDF文件第7页 
LTC2904/LTC2905  
Precision Dual Supply  
Monitors with Pin-Selectable  
Thresholds  
FEATURES  
DESCRIPTION  
The LTC®2904/LTC2905 are dual supply monitors in-  
tended for systems with two supply voltages. The dual  
supply monitors have a common reset output with delay  
(200ms for the LTC2904 and adjustable using an exter-  
nal capacitor for the LTC2905). This product provides a  
precise, space-conscious and micropower solution for  
supply monitoring.  
n
Monitors Two Inputs Simultaneously  
n
Nine Threshold Combinations  
n
Three Supply Tolerances (5%, 7.5%, 10%)  
n
Guaranteed Threshold Accuracy: 1.5% of  
Monitored Voltage Over Temperature  
n
Internal V Auto Select  
CC  
n
Power Supply Glitch Immunity  
n
200ms Reset Time Delay (LTC2904 Only)  
The LTC2904/LTC2905 feature a tight 1.5% threshold  
accuracyoverthewholeoperatingtemperaturerange,and  
glitch immunity to ensure reliable reset operation without  
false triggering. The open drain RST output is guaranteed  
to be in the correct state for inputs down to 1V.  
n
Adjustable Reset Time Delay (LTC2905 Only)  
n
Open Drain RST Output  
n
Guaranteed RST for V1 ≥ 1V or V2 ≥ 1V  
n
Low Profile (1mm) SOT-23 (ThinSOT™) and  
Plastic (3mm × 2mm) DFN Packages  
The LTC2904/LTC2905 also feature three programming  
inputpins,whichprogramthethresholdandtolerancelevel  
without requiring any external components. These three  
programming pins provide a total of 27 different voltage  
level and tolerance combinations, eliminating the need to  
have different parts for development and implementation  
of different systems with different voltage levels requiring  
monitoring function.  
APPLICATIONS  
n
Desktop and Notebook Computers  
n
Handheld Devices  
n
Network Servers  
n
Core, I/O Monitor  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
TYPICAL APPLICATION  
5V, 3.3V Dual Supply Monitor with 5% Tolerance  
Table 1. Voltage Threshold Programming  
V1  
5.0  
3.3  
3.3  
3.3  
3.3  
2.5  
2.5  
2.5  
2.5  
V2  
3.3  
2.5  
1.8  
1.5  
1.2  
1.8  
1.5  
1.2  
1.0  
S1  
V1  
S2  
V1  
5V  
DC/DC  
SYSTEM  
LOGIC  
3.3V  
CONVERTER  
Open  
V1  
GND  
Open  
V1  
V1  
V2  
TMR  
GND  
RST  
LTC2905  
0.1μF  
0.1μF  
22nF  
Open  
Open  
GND  
GND  
GND  
V1  
S1  
Open  
GND  
Open  
V1  
S2  
TOL  
29045 TA01  
GND  
29045fd  
1
1234567...16

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