LTC2909

16

2909fb

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

© LINEAR TECHNOLOGY CORPORATION 2005

LT 0807 REV B • PRINTED IN USA

TYPICAL APPLICATIO

RELATED PARTS

Automotive Supply System with Overvoltage, Overcurrent and Overtemperature Protection and Undervoltage Reset

PART NUMBER

DESCRIPTION

COMMENTS

LTC1326/LTC1326-2.5

Micropower Precision Triple Supply Monitor for

5V/2.5V, 3.3V and ADJ

4.725V, 3.118V, 1V Threshold (±0.75%)

LTC1536

Precision Triple Supply Monitor for PCI Applications

LTC1540

Nanopower Comparator with Reference

Adjustable Hysteresis

LTC1726-2.5/LTC1726-5

Micropower Triple Supply Monitor for 2.5V/5V, 3.3V

and ADJ

Adjustable Reset and Watchdog Time-Outs

LTC1727/LTC1728

Micropower Triple Supply Monitor with Open-Drain

Reset

Individual Monitor Outputs in MSOP/5-Lead SOT-23

LTC1985-1.8

Micropower Triple Supply Monitor with Push-Pull

Reset Output

5-Lead SOT-23 Package

LTC2900

Programmable Quad Supply Monitor

Adjustable Reset, 10-Lead MSOP and 3mm × 3mm 10-Lead DFN

Package

LTC2901

Programmable Quad Supply Monitor

Adjustable Reset and Watchdog Timer, 16-Lead SSOP Package

LTC2902

Programmable Quad Supply Monitor

Adjustable Reset and Tolerance, 16-Lead SSOP Package, Margining

Functions

LTC2903

Precision Quad Supply Monitor

6-Lead SOT-23 Package, Ultralow Voltage Reset

LTC2904/LTC2905

3-State Programmable Precision Dual Supply Monitor

Adjustable Tolerance and Reset Timer, 8-Lead SOT-23 Package

LTC2906/LTC2907

Precision Dual Supply Monitor 1-Selectable and

1 Adjustable

LTC2908

Precision Six Supply Monitor (Four Fixed and

2 Adjustable)

8-Lead SOT-23 and DDB Packages

LT6700

Micropower, Low Voltage, Dual Comparator with

400mV Reference

6-Lead SOT-23 Package

ADJ1

LTC2909-2.5

REF

ADJ2

RST

SEL

TMR

102k

GND

ADJ1

LTC2909-2.5

REF

ADJ2

RST

SEL

TMR

ADJ1

LTC2909-2.5

REF

ADJ2

RST

SEL

TMR

GND

GND

340k

51.1k

221k

49.9k

NTC THERMISTOR

NTHS-1206N01

R25 = 100k

R = 10.7k AT 85

°C

10.7k

4.7k

100k

10nF

100nF

100k

10k

4.7k

2.49M

2.05M

221k

1.07M

1.15M

10k

2909 TA05

10

Ω

1k

Q2

Q1

D1

2N6507

M1

IRLZ34

D1: 1N5238B OR SIMILAR

Q1, Q2: FFB2227 OR SIMILAR

12V

0.01

Ω

680nF

100nF

ON

FB

GATE

SENSE

TIMER

CIRCUIT BREAKER AND CROWBAR

GND

LT1641-2

PWRGD

DC/DC

2.5V

3.3V

DC/DC

100nF

SYSTEM

12V OV AND 3.3V OV DETECT

2.5V OV AND T > 85

°C DETECT

12V, 3.3V and 2.5V UV DETECT