FireWire Current Limiter and Low-Drop

ORing Switch Controller

_______________________________________________________________________________________

5

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

35

30

20

25

15

10

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8

1.9

2.0

1.0

540

°C

°C

°C

SHUTDOWN SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

35

30

20

25

15

10

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

0

540

CURRENT-LIMIT/CIRCUIT-BREAKER

THRESHOLD VOLTAGE vs. TEMPERATURE

TEMPERATURE (

°C)

60

35

10

-15

46.5

47.0

47.5

48.0

48.5

49.0

49.5

50.0

50.5

51.0

51.5

52.0

46.0

-40

85

ILIM = GND

CURRENT-LIMIT/CIRCUIT-BREAKER

THRESHOLD VOLTAGE vs. TEMPERATURE

TEMPERATURE (

°C)

60

35

10

-15

56.5

57.0

57.5

58.0

58.5

59.0

59.5

60.0

60.5

61.0

61.5

62.0

56.0

-40

85

ILIM = IN

CURRENT-LIMIT/CIRCUIT-BREAKER

THRESHOLD VOLTAGE vs. TEMPERATURE

TEMPERATURE (

°C)

60

35

10

-15

36.5

37.0

37.5

38.0

38.5

39.0

39.5

40.0

40.5

41.0

41.5

42.0

36.0

-40

85

ILIM = FLOATING

Ω)

100

10

0.1

1

10

100

0.01

1

1000

MAX5943A

MAX5943E

ORing THRESHOLD VOLTAGE

vs. TEMPERATURE

TEMPERATURE (

°C)

60

35

-15

10

5.0

6.0

7.0

8.0

9.0

10.0

11.0

12.0

4.0

-40

85

5.5

6.5

7.5

8.5

9.5

10.5

11.5

4.5

OR_ADJ = IN

OR_ADJ = OPEN

OR_ADJ = GND

GATE CURRENTS vs. TEMPERATURE

TEMPERATURE (

°C)

60

35

10

-15

-40

85

GATE2

44.5

45.0

45.5

46.0

46.5

47.0

44.0

GATE1

GATE1 DRIVE VOLTAGE

vs. TEMPERATURE

TEMPERATURE (

°C)

60

35

10

-15

5.233

5.236

5.239

5.242

5.245

5.248

5.251

5.254

5.257

5.260

5.230

-40

85

Typical Operating Characteristics