LTC1728 LINER [Linear Technology], LTC1728 Datasheet - Page 16

• Manufacturer Part Number: LTC1728
• Description: Micropower Precision Triple Supply Monitors in 8-Lead MSOP and 5-Lead SOT-23 Packages
• Manufacturer: LINER [Linear Technology]

RELATED PARTS
LTC1727/LTC1728
PART NUMBER
LTC690
LTC694-3.3
LTC699
LTC1232
LTC1326
LTC1326-2.5
LTC1443/LTC1444
LTC1445
LTC1536
LTC1540
LTC1726-2.5
LTC1726-5
LTC1985-1.8
16
TYPICAL APPLICATIO
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone] www.linear-tech.com
DESCRIPTION
5V Supply Monitor, Watchdog Timer and Battery Backup
3.3V Supply Monitor, Watchdog Timer and Battery Backup
5V Supply Monitor and Watchdog Timer
5V Supply Monitor, Watchdog Timer and Push-Button Reset
Micropower Precision Triple Supply Monitor for 5V, 3.3V and ADJ
Micropower Precision Triple Supply Monitor for 2.5V, 3.3V and ADJ
Micropower Quad Comparators with 1% Reference
Precision Triple Supply Monitor for PCI Applications
Nanopower Comparator with 2% Reference
Micropower Triple Supply Monitor for 2.5V, 3.3V and ADJ
Micropower Triple Supply Monitor for 5V, 3.3V and ADJ
Micropower Triple Supply Monitor for 3.3V, 1.8V and ADJ
(NORMALLY OPEN)
RESET BUTTON
U
MANUAL
Triple Supply Monitor with Manual Reset Button
*OPTIONAL RESISTOR RECOMMENDED
TO EXTEND ESD TOLERANCE
10k
5%
R3*
V
12V ( 5%)
TRIP
( 0.17V)
= 11.2V
R1
1.07M
0.1%
R2
105k
0.1%
5V
100nF
3.3V
100nF
V
R1 = R2
TRIP
5
4
3
COMMENTS
4.65V Threshold
2.9V Threshold
4.65V Threshold
4.37V/4.62V Threshold
4.725V, 3.118V, 1V Thresholds ( 0.75%)
2.363V, 3.118V, 1V Thresholds ( 0.75%)
LTC1443 Has 1.182V Reference, LTC1444/LTC1445
Have 1.221V Reference and Adjustable Hysteresis
Meets PCI t
1.182V Reference, 300nA Supply Current, 8-Pin MSOP
Adjustable RESET and Watchdog Time Outs
Adjustable RESET and Watchdog Time Outs
Push-Pull RESET Output, SOT-23
=
V
V
V
CC3
CC5
CCA
V
LTC1728-5
R2
CCA
V
V
TRIP
CCA
(R1 + R2)
1727/28 TA02
– 1
GND
RST
FAIL
1
2
Timing Specifications
17278f LT/TP 0400 4K • PRINTED IN THE USA
LINEAR TECHNOLOGY CORPORATION 1999