LTC1726_1 Datasheet, PDF (10/12 Pages) Linear Technology – Triple Supply Monitor and ® Supervisor with Adjustable Reset and Watchdog Timer

LTC1726
TYPICAL APPLICATIO S
Dual Supply Monitor (3.3V or 5V Plus Adjustable)
ADJUSTABLE
SUPPLY
3.3V OR
5V
R1*
R2*
LTC1726-5
1
V_CC3
2
V_CC5
3
V_CCA
4
GND
8
RT
7
WT
6
RST
5
WDI
REFER TO LTC1726-X OVERRIDE FUNCTIONS IN
10k ^{CRT THE APPLICATIONS INFORMATION SECTION}
C_WT
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
V_CC3
2
V_CC25
3
V_CCA
4
GND
8
RT
7
WT
6
RST
5
WDI
10k ^CRT
C_WT
SYSTEM RESET
WDI
1726 TA07
*TO PRESERVE THRESHOLD ACCURACY, SET PARALLEL
COMBINATION OF R1 AND R2 ≤ 66.5k
10
Using V_CCA Tied to DC/DC Feedback Divider
2.9V
LTC1435
6
V_OSENSE
35.7k
1%
3.3V
2.8k
1%
5V
ADJUSTABLE
RESET TRIP
THRESHOLD 2.74V
22.1k
1%
LTC1726-5
1
V_CC3
2
V_CC5
3
V_CCA
4
GND
8
RT
7
WT
6
RST
5
WDI
1726 TA08
C_RT
C_WT
SYSTEM RESET
WDI
1726fb