72V, Overvoltage-Protection Switches/

Limiter Controllers with an External MOSFET

3

Note 3: For accurate overtemperature-shutdown performance, place the device in close thermal contact with the external MOSFET.

ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

OVSET to GATE Propagation

Delay

0.6

µs

UVSET to GATE, POKSET to

POK Propagation Delay

20

µs

Ω

GATE Output High Voltage

V

GATE sinking 15mA, OUTFB = GND

1

GATE Output Low Voltage

0.9

V

GATE Charge-Pump Current

GATE = GND

100

µA

GATE to OUTFB Clamp

Voltage

12

18

V

IN to GATEP Output Low

Voltage

7.5

11.7

V

IN to GATEP Clamp Voltage

12

18

V

SHDN, CLEAR Logic-High

Input Voltage

1.4

SHDN, CLEAR Logic-Low

Input Voltage

0.4

V

SHDN Input Pulse Width

7µs

CLEAR Input Pulse Width

0.5

µs

SHDN, CLEAR Input

Pulldown Current

SHDN is Internally pulled down to GND

0.6

1.0

1.4

µA

Thermal Shutdown

(Note 3)

+160

°C

Thermal-Shutdown

Hysteresis

20

°C

POKSET to POK Delay

(MAX6497/MAX6498)

35

µs

0.4

POK Output Low Voltage

(MAX6497/MAX6498)

0.4

V

POK Leakage Current

(MAX6497/MAX6498)

100

nA