LTC1646

3

1646fa

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input High Voltage

OFF/ON, RESETIN, FAULT

●

2V

TIMER Threshold Voltage

●

1.15

1.25

1.35

V

OFF/ON Input Current

OFF/ON = 5V

●

±0.08

±10

µA

OFF/ON = 0V

●

±0.08

±10

µA

RESETIN Input Current

RESETIN = 5V

●

±0.08

±10

µA

RESETIN = 0V

●

±0.08

±10

µA

●

66

100

µA

●

66

100

µA

●

460

1000

µA

●

0.9

1.5

mA

●

0.9

1.5

mA

TIMER Pin Current

●

–7

–5

–3

µA

6.6

mA

OFF/ON = 5V

●

120

220

Ω

OFF/ON = 5V

●

120

220

Ω

Output Low Voltage

FAULT, PWRGD, RESETOUT, I = 2mA

●

0.25

0.4

V

PRECHARGE Reference Voltage

●

0.90

1.00

1.10

V

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: All currents into device pins are positive; all currents out of device

pins are negative. All voltages are referenced to ground unless otherwise

specified.

TYPICAL PERFOR A CE CHARACTERISTICS

5V Current Foldback Profile

3.3V Current Foldback Profile

OUTPUT VOLTAGE (V)

0

2

4

5

1646 G01

13

12

11

10

9

8

7

6

5

4

3

2

1

0

1646 G02

12

11

10

9

8

7

6

5

4

3

2

1

0

OUTPUT VOLTAGE (V)

0

2

4

5

13

–50

–25

0

25

50

75

100

TEMPERATURE (

°C)

1646 G03

1.8

1.7

1.6

1.5

1.4

1.3

1.2

1.1

1.0

Temperature