Fan-Speed Regulators and Monitors

2

Maxim Integrated

MAX6650/MAX6651

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.

FB, TACH_ ..........................................................-0.3V to +13.2V

Maximum Current

Into All Other Pins ..........................................................50mA

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

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

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

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

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

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

Soldering Temperature (reflow)

Lead(Pb)-free..............................................................+260°C

Containing lead(Pb) ....................................................+240°C

Input Low Voltage

Input Hysteresis

200

mV

Tachometer Threshold

V

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

Output Source Current

50

mA

Output Sink Current

10

mA

Output Voltage Range

0.3

V

Tachometer Input Impedance

70

100

150

k

Ω

Supply Voltage

3.0

5.5

V

Supply Current

10

mA

DAC Differential Nonlinearity

5

LSB

Useful DAC Resolution

8

bits

Feedback Input Impedance

70

100

150

k

Ω

Output Sink Current

10

mA

CONDITIONS

Guaranteed monotonicity on FB (Note 1)

Measured at FB (Note 1)

0 < VFB < 9V

V

0.8

Input High Voltage

V

2

≤ 3.6V

3

Pullup Resistor

100

k

Ω

TACHOMETER INPUTS (TACH_)

FEEDBACK (FB)

GENERAL-PURPOSE INPUTS/OUTPUTS (GPIO_) (Note 2)

OUTPUT (OUT)