ORing MOSFET Controller with

Ultra-Fast 200ns Turn-Off

_______________________________________________________________________________________

5

0

20

10

40

30

60

50

70

90

80

100

00.2 0.30.4

0.1

0.5 0.6 0.7

0.9

0.8

1.0

SLOW-COMPARATOR BLANKING TIME

Ω)

µF)

75mV OVERDRIVE

FAST-COMPARATOR REVERSE VOLTAGE

Ω)

140

120

80

100

40

60

20

0.1

0.3

0.5

0.2

0.4

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

0

0

°C

°C

°C

FAST-COMPARATOR RESPONSE TIME

TEMPERATURE (

°C)

110

95

65 80

-10 5

20 35 50

-25

8

16

24

32

40

48

56

64

72

80

0

-40

125

CHARGE-PUMP FREQUENCY

vs. INPUT VOLTAGE

14

12

10 11

13

9

7 8

2 3 4 5 6

1

62

64

66

68

70

72

74

76

78

80

60

015

°C

°C

°C

°C

10

0.5

1.0

1.5

2.0

2.5

3.5

4.0

4.5

5.0

6.0

0

1

100

3.0

5.5

FAULT CURRENT WAVEFORM

(IN SHORTED TO PGND)

MAX5079 toc09

UVLO = IN

BUS

5V/div

IN

5V/div

GATE

10V/div

MOSFET REVERSE

CURRENT

5A/div

400ns/div

Typical Operating Characteristics (continued)