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LTC2900 PDF预览

LTC2900

更新时间: 2024-02-27 22:38:03
品牌 Logo 应用领域
凌特 - Linear 监视器
页数 文件大小 规格书
16页 200K
描述
Programmable Quad Supply Monitor with Adjustable Reset Timer

LTC2900 数据手册

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LTC2900  
Programmable Quad Supply  
Monitor with Adjustable Reset Timer  
U
FEATURES  
DESCRIPTIO  
Simultaneously Monitors Four Supplies  
The LTC®2900 is a programmable supply monitor for  
16 User Selectable Combinations of 5V, 3.3V, 3V,  
2.5V, 1.8V, 1.5V and/or ±Adjustable Voltage  
Thresholds  
systemswithuptofoursupplyvoltages. Oneof16preset  
or adjustable voltage monitor combinations can be se-  
lected using an external resistor divider connected to the  
program pin. The preset voltage thresholds are accurate  
to ±1.5% over temperature.  
Guaranteed Threshold Accuracy: ±1.5% of  
Monitored Voltage Over Temperature  
Low Supply Current: 43µA Typ  
Adjustable Reset Time  
Small MSOP and 3mm × 3mm DFN Packages  
Manual Reset Pin  
The reset delay time is adjustable using an external  
capacitor and the manual reset input may be used with a  
momentaryswitchtoissueresetpulseswithprogrammed  
duration. Tight voltage threshold accuracy and glitch  
immunity ensure reliable reset operation without false  
triggering. The RST output is guaranteed to be in the  
correctstateforVCC downto1V.TheLTC2900-1features  
an open-drain RST output, while the LTC2900-2 has a  
push-pull RST output.  
Open-Drain RST Output (LTC2900-1)  
Push-Pull RST Output (LTC2900-2)  
Power Supply Glitch Immunity  
Guaranteed RST for VCC 1V  
U
APPLICATIO S  
The 43µA supply current makes the LTC2900 ideal for  
power conscious systems and it may be configured to  
monitor less than four inputs. The parts are available in  
the 10-lead MSOP and the 10-lead 3mm × 3mm DFN  
packages.  
Desktop and Notebook Computers  
Multivoltage Systems  
Telecom Equipment  
Portable Battery-Powered Equipment  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Network Servers  
U
TYPICAL APPLICATIO  
Quad Supply Monitor (5V, 3.3V, 2.5V, 1.8V)  
5V  
3.3V  
2.5V  
1.8V  
DC/DC  
CONVERTER  
SYSTEM  
LOGIC  
V3  
V1  
LTC2900-2  
V2  
V4  
C1  
0.1µF  
C2  
0.1µF  
V
REF  
RST  
PBR  
CRT  
R1  
59k  
1%  
V
PG  
GND  
PUSH-BUTTON  
RESET  
R2  
40.2k  
1%  
C
RT  
47nF  
2900 TA01  
t
= 216ms  
RST  
2900f  
1

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