FireWire Current Limiter and Low-Drop

ORing Switch Controller

2

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

(Voltages referenced to GND, unless otherwise noted.)

IN ............................................................................-0.3V to +80V

OUT ........................................................................-0.3V to +80V

SENSE to IN..............................................................-1V to +0.3V

GATE1 to SENSE......................................................-0.3V to +8V

GATE2 to OUT (internally clamped).........................-0.3V to +8V

FAULT.....................................................................-0.3V to +85V

ON, TIM, ILIM, LATCH, OR_ADJ, ONQ1 ..........-0.3V to (IN + 0.3V)

Continuous Power Dissipation (TA = +70°C)

16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW

Operating Temperature Range ...........................-40°C to +85°C

Maximum Junction Temperature .....................................+150°C

Storage Temperature Range .............................-60°C to +150°C

ESD Rating (Human Body Model)......................................2000V

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

SUPPLIES

Supply Voltage Range

7.5

37

V

Supply Current

1.3

2.3

mA

Shutdown Current

5

10

µA

IN Default Undervoltage Lockout

6.2

6.5

6.8

V

IN Default Undervoltage Lockout

Hysteresis

0.35

V

ON Undervoltage Lockout

Threshold

1.20

1.24

1.275

V

ON Undervoltage Lockout

Threshold Hysteresis

70

mV

ON Input Bias Current

1µA

GATE2 (current-limit/circuit-breaker control)

GATE2 Pullup Current

(Note 2)

36

45

54

µA

4.25

5.5

6.5

GATE2 High Voltage

4.5

5.5

6.5

V

ILIM = GND

47.5

50

52.5

ILIM = floating

37

39

41

Current-Limit/Circuit-Breaker

Threshold Voltage

ILIM = IN

55

58.5

61

mV

ILIM = GND

70

75

80

ILIM = floating

54

59

64

Fast Pulldown Current-Limit

Threshold Voltage (MAX5943A)

ILIM = IN

83

88

93

mV

GATE2 Pulldown Current

(MAX5943A)

335

435

535

µA

GATE2 Fast Pulldown Current

(MAX5943A)

4.5V

80

125

200

mA

GATE2 Peak Pulldown Current

(MAX5943A)

1.0

A