LTC1726I データシートの表示（PDF） - Linear Technology
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LTC1726I
Linear Technology
LTC1726I Datasheet PDF : 14 Pages
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LTC1726
Typical Applications
Disabling the Watchdog Timer
ADJUSTABLE
SUPPLY
3.3V
5V/2.5V
R1*
R2*
LTC1726-5/LTC1726-2.5
1
8
VCC3
RT
2
7
VCC5/VCC25 WT
3
6
VCCA
RST
4
5
GND
WDI
CRT
SYSTEM
RESET
1726 TA03
*TO PRESERVE THRESHOLD ACCURACY, SET PARALLEL
COMBINATION OF R1 AND R2 ≤ 66.5k
THE WATCHDOG TIMER CAN BE DISABLED BY CONNECTING
THE WDI AND WT PINS TO GROUND. THE PART WILL ACT
STRICTLY AS A TRIPLE SUPPLY MONITOR WITH AN
ADJUSTABLE RESET TIME-OUT PERIOD
Triple Supply Monitor (3.3V, 5V and Adjustable)
ADJUSTABLE SUPPLY
OR DC/DC FEEDBACK
DIVIDER
3.3V
5V
R1*
R2*
LTC1726-5
1
VCC3
2
VCC5
3
VCCA
4
GND
8
RT
7
WT
6
RST
5
WDI
CRT
CWT
SYSTEM RESET
WDI
1726 TA04
*TO PRESERVE THRESHOLD ACCURACY, SET PARALLEL
COMBINATION OF R1 AND R2 ≤ 66.5k
Dual Supply Monitor (3.3V and 5V, Defeat VCCA Input)
LTC1726-5
CRT
1
8
3.3V
VCC3
RT
5V
2
VCC5
7
WT
CWT
3
VCCA
6
RST
SYSTEM RESET
4
GND
5
WDI
WDI
1726 TA05
Dual Supply Monitor (3.3V or 5V Plus Adjustable)
ADJUSTABLE
SUPPLY
3.3V OR
5V
R1*
R2*
LTC1726-5
1
VCC3
2
VCC5
3
VCCA
4
GND
8
RT
7
WT
6
RST
5
WDI
REFER TO LTC1726-X OVERRIDE FUNCTIONS IN
10k CRT THE APPLICATIONS INFORMATION SECTION
CWT
SYSTEM RESET
WDI
1726 TA06
*TO PRESERVE THRESHOLD ACCURACY, SET PARALLEL
COMBINATION OF R1 AND R2 ≤ 66.5k
Dual Supply Monitor (3.3V Plus Adjustable)
ADJUSTABLE
SUPPLY
3.3V
R1*
R2*
LTC1726-2.5
1
VCC3
2
VCC25
3
VCCA
4
GND
8
RT
7
WT
6
RST
5
WDI
10k CRT
CWT
SYSTEM RESET
WDI
1726 TA07
Using VCCA Tied to DC/DC Feedback Divider
2.9V
LTC1435
6
VOSENSE
ADJUSTABLE
RESET TRIP
THRESHOLD 2.74V
35.7k
1%
3.3V
2.8k
1%
5V
22.1k
1%
LTC1726-5
1
VCC3
2
VCC5
3
VCCA
4
GND
8
RT
7
WT
6
RST
5
WDI
1726 TA08
CRT
CWT
SYSTEM RESET
WDI
10
*TO PRESERVE THRESHOLD ACCURACY, SET PARALLEL
COMBINATION OF R1 AND R2 ≤ 66.5k
For more information www.linear.com/LTC1726
1726fd
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