Overvoltage Protection Switch/Limiter

Controllers Operate Up to 72V

2

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

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

ation 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.

(All pins referenced to GND, unless otherwise noted.)

IN, GATE, OUT ............................................................-0.3V to +80V

SHDN..................................................................-0.3V to (IN + 0.3V)

GATE to OUT .................................................................-0.3 to +20V

SET, REG, POK ...........................................................-0.3V to +12V

Maximum Current:

IN, REG...............................................................................350mA

All Remaining Pins ...................................................................50mA

6-Pin TDFN (derate 18.2mW/°C above +70°C) .............1455mW

8-Pin TDFN (derate 18.2mW/°C above +70°C) .............1455mW

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

Storage Temperature Range .................................-65°C to +150°C

Lead Temperature ................................................................+300°C

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Supply Voltage Range

5.5

72

V

SHDN = high, no load (MAX6397)

118

140

SHDN = high, (MAX6398)

104

130

SHDN = low, no load (MAX6397)

37

45

Input Supply Current

SHDN = low, (MAX6398)

11

20

µA

IN Undervoltage Lockout

4.66

5

5.50

V

IN Undervoltage Lockout

Hysteresis

175

mV

SET Threshold Voltage

With respect to GND

1.181

1.215

1.248

V

SET Threshold Hysteresis

4%

SET Input Current

-50

+50

nA

Startup Response Time

SHDN rising (Note 2)

100

µs

GATE Rise Time

1ms

SET to GATE Propagation Delay

100mV

0.75

µs

Ω

3.8V

4.2V

4.6V

GATE Output High Voltage

8.5V

9.2V

11.5V

V

GATE Output Low Voltage

0.38

V

GATE Charge-Pump Current

GATE = GND

75

µA

GATE to OUT Clamp Voltage

13

18

V

SHDN Logic-High Input Voltage

1.4

SHDN Logic-Low Input Voltage

0.4

SHDN Input Pulldown Current

down to GND

1µA

Thermal Shutdown

(Note 3)

+150

°C

Thermal Shutdown Hysteresis

20

°C

REGULATOR (MAX6397)

40

48

Ground Current

SHDN = GND

60

µA