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

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

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