Rainbow-electronics MAX5943 Manual de usuario descargar pdf (Pagina 2)

MAX5943

FireWire Current Limiter and Low-Drop

ORing Switch Controller

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

= 7.5V to 37V, GND = 0V, and T

= -40°C to +85°C, unless otherwise noted. Typical values are at V

= 12V, T

= +25°C.)

(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 (T

= +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 V

7.5 37 V

Supply Current I

= 3V, no load 1.3 2.3 mA

Shutdown Current I

= 0.4V 5 10 µA

IN Default Undervoltage Lockout V

UVLO

rising, ON = IN 6.2 6.5 6.8 V

IN Default Undervoltage Lockout

Hysteresis

0.35 V

ON Undervoltage Lockout

Threshold

ON_REF

rising 1.20 1.24 1.275 V

ON Undervoltage Lockout

Threshold Hysteresis

70 mV

ON Input Bias Current I

1µA

GATE2 (current-limit/circuit-breaker control)

GATE2 Pullup Current I

G2U

(Note 2) 36 45 54 µA

7.5V ≤ V

≤ 8V 4.25 5.5 6.5

GATE2 High Voltage V

GATE2

- V

OUT

8V ≤ V

≤ 37V 4.5 5.5 6.5

ILIM = GND 47.5 50 52.5

ILIM = floating 37 39 41

Current-Limit/Circuit-Breaker

Threshold Voltage

- V

SENSE

ILIM = IN 55 58.5 61

ILIM = GND 70 75 80

ILIM = floating 54 59 64

Fast Pulldown Current-Limit

Threshold Voltage (MAX5943A)

THF

- V

SENSE

(Note 3)

ILIM = IN 83 88 93

GATE2 Pulldown Current

(MAX5943A)

G2D

< (V

- V

SENSE)

< V

THF

t < t

ILIM

335 435 535 µA

GATE2 Fast Pulldown Current

(MAX5943A)

G2DF

- V

SENSE)

> V

THF

, V

GATE2

= V

OUT

4.5V

80 125 200 mA

GATE2 Peak Pulldown Current

(MAX5943A)

G2DP

- V

SENSE)

= 1V 1.0 A

1 2 3 4 5 6 7 ... 19 20

ORing Switch Controller 1

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Rainbow-electronics MAX5943 Manual de usuario Pagina 2

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