3

LT1641

1641fd

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

ON Low to GATE Low

Figures 1, 2

6

µs

ON High to GATE High

Figures 1, 2

1.7

µs

FB Low to PWRGD Low

Figures 1, 3

3.2

µs

FB High to PWRGD High

Figures 1, 3

1.5

µs

Figures 1, 4

0.5

1

2

µs

AC ELECTRICAL CHARACTERISTICS

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

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

0

20

40

60

80

100

1641 G01

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0

85

°C

25

°C

–45

°C

TEMPERATURE (

°C)

–50

–25

0

25

50

75

100

1641 G02

3.0

2.5

2.0

1.5

1.0

0.5

0

48V

24V

TEMPERATURE (

°C)

–50

–25

0

25

50

75

100

1641 G03

1.250

1.245

1.240

1.235

1.230

1.225

1.220

1.215

1.210

1.205

1.200

TEMPERATURE (

°C)

–50

–25

0

25

50

75

100

1641 G04

1.335

1.330

1.325

1.320

1.315

1.310

1.305

1.300

1.295

1.290

1.285

1.280

TEMPERATURE (

°C)

–50

–25

0

25

50

75

100

1641 G05

0.100

0.095

0.090

0.085

0.080

0.075

0.070

0.065

0.060

0.055

0.050

0.045

0.040

TEMPERATURE (

°C)

–50

–25

0

25

50

75

100

1641 G06

–5

–6

–7

–8

–9

–10

–11

–12

–13

FB Pin Low Voltage Threshold vs

Temperature

FB Pin High Voltage Threshold vs

Temperature

FB Pin Hysteresis vs Temperature