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LTC2931CF-PBF PDF预览

LTC2931CF-PBF

更新时间: 2024-02-28 07:05:49
品牌 Logo 应用领域
凌特 - Linear 监视器
页数 文件大小 规格书
16页 270K
描述
Confi gurable Six Supply Monitor with Adjustable Reset and Watchdog Timers

LTC2931CF-PBF 数据手册

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LTC2931  
Configurable Six Supply  
Monitor with Adjustable Reset  
and Watchdog Timers  
DESCRIPTION  
FEATURES  
The LTC®2931 is a configurable supply monitor for  
systemswithuptosixsupplyvoltages. Oneof16presetor  
adjustable voltage monitor combinations can be selected  
using an external resistive divider connected to the mode  
select pin. The preset voltage thresholds are accurate  
to 1.ꢀ5 over temperature. The LTC2931 also features  
adjustable inputs with a 0.ꢀV nominal threshold. All six  
open-drain voltage comparator outputs are connected to  
separate pins for individual supply monitoring.  
Simultaneously Monitors Six Supplies  
16 User Selectable Combinations of  
5V, 3.3V, 3V, 2.5V, 1.8V, 1.5V and Adꢀustable  
Voltage Thresholds  
Guaranteed Threshold Accuracy: 1.5ꢁ  
Adꢀustable Reset and Watchdog Timeout  
Low Supply Current: 52μA  
Comparator/Monitor Output for Each Supply  
Power Supply Glitch Immunity  
Guaranteed RST for V ≥ 1V  
CC  
The reset and watchdog timeout periods are adjustable  
usingexternalcapacitors.Tightvoltagethresholdaccuracy  
andglitchimmunityensurereliableresetoperationwithout  
false triggering. The RST output is guaranteed to be in the  
High Temperature Operation to 12ꢀ°C  
20-Lead TSSOP Package  
APPLICATIONS  
correct state for V down to 1V. Each status output has  
CC  
a weak internal pull-up and may be externally pulled up  
Desktop and Notebook Computers  
to a user defined voltage.  
Multivoltage Systems  
The ꢀ2μA supply current makes the LTC2931 ideal for  
power conscious systems and it may be configured to  
monitor fewer than six inputs.  
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
Protected by U.S. Patents including 6967591, 7239251, 7119714.  
Telecom Equipment  
Portable Battery-Powered Equipment  
Network Servers  
Automotive  
TYPICAL APPLICATION  
Six Supply Monitor 12V (ADJ), 5V, 3.3V, 2.5V, 1.8V, 1.2V (ADJ)  
Voltage Threshold Configuration Table  
12V  
V1 (V) V2 (V) V3 (V) V4 (V) V5 (V) V6 (V)  
ꢀV  
ꢀ.0  
ꢀ.0  
ꢀ.0  
ꢀ.0  
ꢀ.0  
ꢀ.0  
ꢀ.0  
ꢀ.0  
ꢀ.0  
ꢀ.0  
3.3  
3.3  
3.3  
3.3  
3.3  
3.3  
3.3  
3.3  
3.3  
3.3  
3.3  
3.3  
3.3  
3.0  
3.0  
3.0  
2.ꢀ  
2.ꢀ  
2.ꢀ  
2.ꢀ  
2.ꢀ  
2.ꢀ  
2.ꢀ  
2.ꢀ  
2.ꢀ  
1.8  
1.8  
ADJ  
ADJ  
2.ꢀ  
1.8  
ADJ  
1.8  
1.8  
1.8  
1.ꢀ  
ADJ  
ADJ  
1.8  
1.ꢀ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
ADJ  
3.3V  
2.ꢀV  
SYSTEM  
LOGIC  
1.8V  
1.2V  
ADJ  
ADJ  
–ADJ  
ADJ  
–ADJ  
ADJ  
ADJ  
ADJ  
1.ꢀ  
ADJ  
–ADJ  
ADJ  
ADJ  
–ADJ  
10k  
POWER  
GOOD  
21ꢀ0k 124k  
15  
15  
V1  
V2  
V3  
WDI  
0.1μF  
V4  
LTC2931  
0.1μF  
Vꢀ  
WDO  
RST  
V6  
100k  
15  
100k  
15  
ꢀ9k  
15  
VREF  
R1  
2931 TA01  
VPG  
t
t
= 94ms  
= 940ms  
RST  
WD  
CWT  
CRT  
GND  
R2  
40.2k  
15  
C
WT  
47nF  
C
RT  
47nF  
2931fb  
1

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