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LTC2900

更新时间： 2024-02-17 03:09:31
品牌 Logo 应用领域
Linear Systems 监视器
页数 文件大小 规格书
16页 237K
描述
36V Nano-Current Two Input Voltage Monitor

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LTC2900 数据手册

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LTC2960  
36V Nano-Current  
Two Input Voltage Monitor  
FEATURES  
DESCRIPTION  
The LTC®2960 is a nano-current, high voltage two input  
voltage monitor, ideally suited for multicell battery ap-  
plications. External resistive dividers configure custom  
comparator thresholds. The supervisory circuit monitors  
the ADJ input and pulls the RST output low when the input  
drops below threshold. A reset timeout period delays the  
return of the RST output to a high state when the input  
rises above the threshold. The spare comparator allows  
voltageconditionstobedetectedwitheitheranon-inverting  
n
850nA Quiescent Current  
n
Operating Range: 2.5V < V < 36V  
CC  
n
1.5% (Max) Accuracy Over Temperature  
n
Adjustable Reset Threshold  
n
Wide Temperature Range (–40°C to 125°C)  
+
–
n
n
n
Adjustable IN /IN Threshold  
Manual Reset Input  
Compact 2mm × 2mm 8-lead DFN and  
TSOT-23 (ThinSOT™) Packages  
+
input, IN (LTC2960-1/LTC2960-3) or an inverting input,  
APPLICATIONS  
–
IN (LTC2960-2/LTC2960-4). A manual reset (MR) input  
is provided for external activation of the reset output.  
n
Portable Equipment  
n
Battery Powered Equipment  
Other options provided on the LTC2960-1/LTC2960-2 in-  
cludearesettimeoutperiodselectpin,RT,toselectbetween  
15ms or 200ms reset timeout periods. The LTC2960-3/  
LTC2960-4 have a fixed 200ms reset timeout period. The  
RST and OUT outputs are available with active pull-up cir-  
cuitstoanoutputlogicsupplypin(LTC2960-3/LTC2960-4)  
or 36V open-drain outputs (LTC2960-1/LTC2960-2).  
n
Security Systems  
Automotive Systems  
n
LTC2960 Option Table  
Option  
Inputs  
Reset Timeout Period  
15ms/200ms  
15ms/200ms  
200ms  
Output Type  
36V Open-Drain  
36V Open-Drain  
Active Pull-up  
Active Pull-up  
+
LTC2960-1  
LTC2960-2  
LTC2960-3  
LTC2960-4  
ADJ/IN  
ADJ/IN  
ADJ/IN  
ADJ/IN  
–
+
–
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property  
of their respective owners.  
200ms  
TYPICAL APPLICATION  
Battery and Regulator Monitor  
Supply Current vs Supply Voltage  
1200  
6V < V < 8.4V  
IN  
MR=5V, 27C  
V
OUT  
LTC3632  
1.8V  
DC/DC  
Li-Ion  
4.2V  
+
R2  
R4  
900  
600  
300  
0
6.04M  
1.3M  
GND  
C1  
0.1μF  
50V  
C2  
1μF  
LTC2960-3  
V
DV  
CC  
CC  
+
IN  
RST  
RESET  
LOW BATTERY  
R1  
402k  
Li-Ion  
4.2V  
OUT  
ADJ  
+
MR  
GND  
R3  
402k  
2960 TA01  
0
8
16  
V
24  
(V)  
32  
40  
CC  
POWER-FAIL FALLING THRESHOLD = 6.410V  
RESET FALLING THRESHOLD = 1.693V  
2960 TA01a  
2960f  
1
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