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LTH2911HDDB-1#TR PDF预览

LTH2911HDDB-1#TR

更新时间： 2024-09-26 10:17:51
品牌 Logo 应用领域
凌特 - Linear 光电二极管
页数 文件大小 规格书
20页 245K
描述
IC POWER SUPPLY SUPPORT CKT, PDSO8, 3 X 2 MM, PLASTIC, MO-229, DFN-8, Power Management Circuit

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LTH2911HDDB-1#TR 数据手册

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LTC2911  
Precision Triple Supply  
Monitor with Power-Fail  
Comparator  
FEATURES  
DESCRIPTION  
The LTC®2911 is a low power, high accuracy triple supply  
monitor with a power-fail comparator. Reset timeout may  
beselectedwithanexternalcapacitororsettoaninternally  
generated 200ms.  
n
Ultralow Voltage Reset: V = 0.5V Guaranteed  
Monitors Three Inputs Simultaneously:  
CC  
n
3.3V, 5V, ADJ (LTC2911-1)  
3.3V, 2.5V, ADJ (LTC2911-2)  
3.3V, 1.8V, ADJ (LTC2911-3)  
3.3V, 1.2V, ADJ (LTC2911-4)  
3.3V, ADJ, ADJ (LTC2911-5)  
The V1 pin monitors a 3.3V supply. The V2 pin monitors a  
5V, 2.5V, 1.8V, 1.2V or adjustable supply. A third adjustable  
input has a nominal 0.5V threshold allowing a resistive  
divider to configure its threshold. All three comparators  
feature a tight 1.5% threshold accuracy over the entire  
operating temperature range while a glitch filter ensures  
reliable reset operation.  
n
1.5ꢀ Threshold Aꢁꢁuraꢁy  
n
Power-Fail Monitor  
n
RST State Can Be Held for Margining  
n
Low Supply Current: 30µA Typical  
n
Input Glitch Immunity  
n
A spare comparator can be configured to provide early  
warningofalowvoltagecondition.ItcausesthePFOoutput  
topulllowwhenthevoltageofthePFIinputfallsbelow0.5V,  
allowing the power-fail threshold to be configured with  
a resistive divider. A latch feature on the TMR pin allows  
the RST output to be latched to prevent system resets,  
simplifying margin testing.  
Adjustable Reset Timeout Period  
n
Selectable Internal Timeout Saves Components  
n
Space Saving 8-Lead TSOT-23 and 3mm × 2mm DFN  
Packages  
APPLICATIONS  
n
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
Protected by U.S. Patents, including 6949965, 7292076.  
Network Servers  
n
Desktop and Notebook Computers  
n
Automotive and Industrial Electronics  
TYPICAL APPLICATION  
RST Output Voltage With 10k Pull-Up to V1  
3.3V  
6
V1 = V2  
2.5V  
1.0V  
DC/DC  
SYSTEM  
LOGIC  
CONVERTER  
5
4
3
2
1
0
10k  
TMR  
V1  
RESET  
LOBAT  
RST  
PFO  
V2  
76.8k  
100k  
LTC2911-2  
ADJ  
576k  
Li-Ion  
BATTERY  
STACK  
+
PFI  
GND  
100k  
t
= 200ms  
RST  
2911 TA01a  
0
0.5  
1
1.5  
2
2.5  
3 3.5 4 4.5 5 5.5  
V1 (V)  
2911 TA01b  
2911f  
1
1234567...20

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