Remote Temperature Switches with Integrated

Fan Controller/Driver

2

_______________________________________________________________________________________

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

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.

PGND to GND .......................................................-0.3V to +0.3V

FANOUT to GND ....................................................-0.3V to +15V

DXN to GND ..........................................................-0.3V to +0.8V

FORCEON, OT..............................................................±20mA

Current into FANOUT, PGND ........................................ ±300mA

8-Pin µMAX (derate 4.1mW/°C above +70°C) .............333mW

10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW

Operating Temperature Range .........................-40°C to +125°C

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

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

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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

POWER SUPPLY

Power-Supply Range

3

3.6

V

Average Supply Current

110

200

µA

Operating Current

During sampling

400

650

µA

Power-On Reset (POR) Threshold

POR

1

1.5

2.0

V

POR Threshold Hysteresis

50

mV

TEMPERATURE SENSOR

°C to +75°C (Note 1),

±1

±2.2

FANOUT Temperature

Threshold Accuracy

°C to +75°C (Note 1),

±1

±4

°C

HYST = GND

4

HYST = float

8

MAX6670

12

FANOUT Temperature

Threshold Hysteresis

MAX6668

8

°C

WARN Temperature Threshold

(MAX6670 Only)

Relative to FANOUT temperature threshold

+15

°C

OT Temperature Threshold

(MAX6670 Only)

Relative to FANOUT temperature threshold

+30

°C

Supply Sensitivity of Temperature

Threshold

1

1.6

°C/V

Temperature Sample Frequency

3.3

4

Hz

FAN DRIVE OUTPUT

FANOUT Output Voltage Low

0.5

1

V

Thermal Shutdown

170

°C

Thermal Shutdown Hysteresis

20

°C

LOGIC INPUT/OUTPUT

FORCEON Input High Voltage

0.8 x

V