3

LT4250L/LT4250H

4250lhf

TYPICAL PERFOR A CE CHARACTERISTICS

SUPPLY VOLTAGE (V)

0

1.3

1.4

1.5

60

100

1640 G01

1.2

1.1

0

20

40

80

1.6

1.7

1.8

Supply Current vs Supply Voltage

TEMPERATURE (

°C)

–50

– 25

1.0

1.1

1.2

1.3

1.4

1.6

025

50

75

1640 G02

100

1.5

Supply Current vs Temperature

SUPPLY VOLTAGE (V)

0

6

7

9

10

11

40

80

100

15

1640 G03

8

20

60

12

13

14

Gate Voltage vs Supply Voltage

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

OV Pin Hysteresis

20

mV

OV Pin Input Current

q

– 0 .03

– 0.5

µA

DRAIN Low Threshold

1.1

1.6

2.3

V

GATE High Threshold

1.3

V

Drain Input Bias Current

q

10

80

500

µA

PWRGD Output Low Voltage

q

0.48

0.8

V

q

1.2

3.0

V

PWRGD Output Low Voltage

(PWRGD – DRAIN)

q

0.75

1.0

V

Output Leakage

q

0.05

10

µA

q

0.05

10

µA

AC

OV High to GATE Low

Figures 1a, 2

1.7

µs

UV Low to GATE Low

Figures 1a, 3

1.5

µs

OV Low to GATE High

Figures 1a, 2

5.5

µs

UV High to GATE High

Figures 1a, 3

6.5

µs

Figures 1a, 4a

1

3

µs

Current Limit to GATE Low

Figures 1b, 4b

500

µs

DRAIN Low to PWRGD Low

(LT4250L) Figures 1a, 5a

1

µs

DRAIN Low to (PWRGD – DRAIN) High

(LT4250H) Figures 1a, 5a

1

µs

GATE High to PWRGD Low

(LT4250L) Figures 1a, 5b

1.5

µs

GATE High to (PWRGD – DRAIN) High

(LT4250H) Figures 1a, 5b

1.5

µs

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

specified.