LTC1985-1.8_15 datasheet(3/8 Pages) LINER

Part #	LTC1985-1.8

Description	Micropower Precision Triple Supply Monitor with Push-Pull Reset Output in a 5-Lead SOT-23 Package

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Manufacturer	LINER [Linear Technology]

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LTC1985-1.8

TYPICAL PERFOR A CE CHARACTERISTICS

IVCC18 vs Temperature

VCCA Input Current

vs Input Voltage

TEMPERATURE (

°C)

–60

0.5

0.6

0.8

0.9

1.0

1.5

1.2

–20

20

40

1985-18 G02

0.7

1.3

1.4

1.1

–40

0

60

80

100

VCC3 = 3V

VCCA = 3V

VCC18 = 1.8V

INPUT VOLTAGE (V)

0.80 0.85

0.95

1.05

1.15

0

1.0

1.20

1985-18 G03

–1.0

– 2.0

– 0.5

–1.5

0.90

1

1.10

2.0

0.5

1.5

TA = 25°C

VCCA Threshold Voltage

vs Temperature

Reset Pulse Width

vs Temperature

Typical Transient Duration

vs Comparator Overdrive

VCC3 Threshold Voltage

vs Temperature

IVCC3 vs Temperature

TEMPERATURE (

°C)

–60

0.985

0.990

0.995

1.000

1.005

–20

20

60

100

1985-18 G04

1.010

1.015

–40

0

40

80

TEMPERATURE (

°C)

–60

–20

20

40

1985-18 G05

2.845

2.835

2.825

2.815

2.805

2.795

2.785

2.775

2.765

–40

0

60

80

100

RESET COMPARATOR OVERDRIVE VOLTAGE (% OF VCC)

0.1

250

300

350

400

450

1

10

100

1985-18 G07

200

150

50

0

100

RESET OCCURS

ABOVE CURVE

TA = 25°C

TEMPERATURE (

°C)

–60 –40

220

240

260

60

1985-18 G08

200

180

–20

20

40

80

0

100

160

140

280

TEMPERATURE (

°C)

–60

5

6

8

9

10

15

12

–20

20

40

1985-18 G01

7

13

14

11

–40

0

60

80

100

VCC18 Threshold Voltage

vs Temperature

TEMPERATURE (

°C)

–60

1.650

1.660

1.670

1.680

1.690

–20

20

60

100

1985-18 G06

1.700

1.710

–40

0

40

80

VCC3 OR VCC18 (V)

0

0.5

1.0

2.0

1.5

2.5

3.0

1985-18 • G09

8

7

6

5

4

3

2

1

0

TA = 25°C

VOL = 0.4V

VOL = 0.2V

ISINK vs Supply Voltage

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LTC1985-1.8 Datasheet(PDF) 3 Page - Linear Technology

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