LTC2921 datasheet(5/16 Pages) LINER

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LTC2903-1

29031f a

TYPICAL PERFOR A CE CHARACTERISTICS

Transient Duration

vs Comparator Overdrive

Reset Time-Out Period

vs Temperature

RST Output Voltage with 10k

Pull-Up to V1

RST Output Voltage with

10k Pull-Up to V1

RESET COMPARATOR OVERDRIVE (% OF VRTX)

0.1

250

300

350

400

100

29031 G10

200

150

100

RESET OCCURS

ABOVE CURVE

TEMPERATURE (°C)

–50

140

160

180

200

220

260

–25

025

29301 G11

100

240

V1 (V)

3.0

4.0

5.0

29031 G12

2.0

1.0

2.5

3.5

4.5

1.5

0.5

1.5

3.5

4.5

2.5

V1 = V2 = V3

LTC2903-B1, -C1

V1 (V)

0.15

0.20

0.25

0.30

0.8

29301 G13

0.10

0.05

0.2

0.4

0.6

1.0

0.7

0.1

0.3

0.5

0.9

V1 ONLY

V1 = V2 = V3

Low Voltage Reset Pull-Down

Performance vs External Pull-Up

Current and Input Supply Voltage

VIN, INPUT SUPPLY VOLTAGE (V)

0.06

0.08

0.10

0.8

29031 G14

0.04

0.02

0.05

0.07

0.09

0.03

0.01

0.2

0.1

1µA

0.4

0.3

0.6 0.7

0.9

0.5

2µA

5µA

20µA

VIN = V1 = V2 = V3

10µA

RST Current Sink Capability

vs VCC

VCC (V)

1.5

2.5

29031 G15

0.5

3.5

4.5

VOL = 0.4V

VOL = 0.2V

RST Voltage Output Low

vs RST Sink Current

IRST (mA)

0.3

0.9

1.2

1.5

29031 G16

0.6

515

LTC2903-A1, -E1

V1 = 3.3V

85°C

25°C

–45°C

IRST (mA)

0.3

0.9

1.2

1.5

29031 G16

0.6

LTC2903-B1, -C1, -D1

V1 = 5V

85°C

25°C

–45°C

RST Voltage Output Low

vs RST Sink Current

Supply Currents vs Temperature

TEMPERATURE (°C)

–50

–25

025

29031 G20

100

LTC2903-E1

LTC2903-D1

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