16

LTC2901

2901is sn2901

PART NUMBER

DESCRIPTION

COMMENTS

LTC690

5V Supply Monitor, Watchdog Timer and Battery Backup

4.65V Threshold

LTC694-3.3

3.3V Supply Monitor, Watchdog Timer and Battery Backup

2.9V Threshold

LTC699

5V Supply Monitor and Watchdog Timer

4.65V Threshold

LTC1232

5V Supply Monitor, Watchdog Timer and Push-Button Reset

4.37V/4.62V Threshold

LTC1326

Micropower Precision Triple Supply Monitor for 5V, 3.3V and ADJ

4.725V, 3.118V, 1V Thresholds (

±0.75%)

LTC1326-2.5

Micropower Precision Triple Supply Monitor for 2.5V, 3.3V and AJD

2.363V, 3.118V, 1V Thresholds (

±0.75%)

LTC1536

Precision Triple Supply Monitor for PCI Applications

LTC1726-2.5

Micropower Triple Supply Monitor for 2.5V, 3.3V and ADJ

Adjustable RESET and Watchdog Time-Outs

LTC1726-5

Micropower Triple Supply Monitor for 5V, 3.3V and ADJ

Adjustable RESET and Watchdog Time-Outs

LTC1727-2.5/LTC1727-5

Micropower Triple Supply Monitors with Open-Drain Reset

Individual Monitor Outputs in MSOP

LTC1728-1.8/LTC1728-3.3

Micropower Triple Supply Monitor with Open-Drain Reset

5-Lead SOT-23 Package

LTC1728-2.5/LTC1728-5

Micropower Triple Supply Monitors with Open-Drain Reset

5-Lead SOT-23 Package

LTC1985-1.8

Micropower Triple Supply Monitor with Push-Pull Reset Output

5-Lead SOT-23 Package

LT/TP 0602 1.5K • PRINTED IN USA

©LINEAR TECHNOLOGY CORPORATION 2002

RELATED PARTS

COMP1

COMP2

COMP3

COMP4

RST

WDO

CRT

CWT

V1

V2

V3

V4

WDI

GND

2

16

1

15

6

7

5

9

2.5V MONITOR

12V MONITOR

–2V MONITOR

COMMON RESET OUT

AC PRESENT

4

14

3

13

8

12

11

10

LTC2901-1

680pF

2901 TA05

47nF

78.7k

1%

121k

1%

187k

1%

Q1

2N3904

2.15M

1%

12V

2.5V

–2V

100k

1%

100k

22.1k

1%

10k

COMP1

COMP2

COMP3

COMP4

RST

WDO

CRT

CWT

V1

V2

V3

V4

WDI

GND

2

16

1

15

6

7

5

9

5V MONITOR

3.3V MONITOR

1.8V MONITOR

–5.2V MONITOR

12V

5V

3.3V

2.5V

1.8V

–2V

–5.2V

4

14

3

13

8

12

11

10

LTC2901-1

3.3V

5V

1.8V

1N4148

47nF

16.2k

1%

121k

1%

487k

1%

LOW

VOLTAGE

SECONDARY

AC/DC

DC/DC

CONVERTERS

–5.2V

86.6k

1%

10k

1N4148

100k

120V AC

Monitor Seven Supplies (12V, 5V, 3.3V, 2.5V, 1.8V, –2V, –5.2V) with

Sequenced Reset and AC Present Indication

TYPICAL APPLICATIO

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417