LTC2901 Linear Technology, LTC2901 Datasheet - Page 16

• Manufacturer Part Number: LTC2901
• Description: Programmable Quad Supply Monitor with Adjustable Reset and Watchdog Timers
• Manufacturer: Linear Technology

120V AC
TYPICAL APPLICATIO
RELATED PARTS
LTC2901
16
PART NUMBER
LTC690
LTC694-3.3
LTC699
LTC1232
LTC1326
LTC1326-2.5
LTC1536
LTC1726-2.5
LTC1726-5
LTC1727-2.5/LTC1727-5
LTC1728-1.8/LTC1728-3.3
LTC1728-2.5/LTC1728-5
LTC1985-1.8
CONVERTERS
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone]
AC/DC
DC/DC
LOW
VOLTAGE
SECONDARY
12V
5V
3.3V
2.5V
1.8V
–2V
–5.2V
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 AJD
Precision Triple Supply Monitor for PCI Applications
Micropower Triple Supply Monitor for 2.5V, 3.3V and ADJ
Micropower Triple Supply Monitor for 5V, 3.3V and ADJ
Micropower Triple Supply Monitors with Open-Drain Reset
Micropower Triple Supply Monitor with Open-Drain Reset
Micropower Triple Supply Monitors with Open-Drain Reset
Micropower Triple Supply Monitor with Push-Pull Reset Output
–5.2V
121k
1%
487k
1%
Monitor Seven Supplies (12V, 5V, 3.3V, 2.5V, 1.8V, –2V, –5.2V) with
16.2k
86.6k
1%
1%
5V
3.3V
1.8V
U
14
13
12
11
10
4
3
8
100k
www.linear.com
Sequenced Reset and AC Present Indication
V1
V2
V3
V4
WDI
V
V
GND
REF
PG
LTC2901-1
COMP1
COMP2
COMP3
COMP4
WDO
CWT
RST
CRT
1N4148
2
16
1
15
6
7
5
9
10k
5V MONITOR
3.3V MONITOR
1.8V MONITOR
–5.2V MONITOR
1N4148
C
47nF
RT1
100k
Q1
2N3904
2.15M
100k
1%
1%
12V
–2V
121k
1%
187k
1%
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%)
Meets PCI t
Adjustable RESET and Watchdog Time-Outs
Adjustable RESET and Watchdog Time-Outs
Individual Monitor Outputs in MSOP
5-Lead SOT-23 Package
5-Lead SOT-23 Package
5-Lead SOT-23 Package
78.7k
22.1k
1%
1%
2.5V
FAIL
14
13
12
11
10
Timing Specifications
4
3
8
t
t
RST1
WD
LINEAR TECHNOLOGY CORPORATION 2002
V1
V2
V3
V4
WDI
V
V
GND
REF
PG
LTC2901-1
= 13.6ms
+ t
RST2
COMP1
COMP2
COMP3
COMP4
LT/TP 0602 1.5K • PRINTED IN USA
WDO
CWT
RST
CRT
= 432ms
2
16
1
15
6
7
5
9
C
680pF
WT
10k
2901 TA05
2.5V MONITOR
12V MONITOR
–2V MONITOR
COMMON RESET OUT
AC PRESENT
2901is sn2901
C
47nF
RT2