MAX6651EEE datasheet(2/25 Pages) MAXIM

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Fan-Speed Regulators and Monitors

with SMBus/I2C-Compatible Interface

Maxim Integrated

MAX6650/MAX6651

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC = 3.0V to 5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C and VCC = 5V.)

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.

VCC to GND ..............................................................-0.3V to +6V

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

All Other Pins..............................................-0.3V to (VCC + 0.3V)

Output Voltages..........................................-0.3V to (VCC + 0.3V)

Maximum Current

Into VCC, GND, VOUT ...................................................100mA

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

Continuous Power Dissipation (TA = +70°C)

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

VHYS

200

Tachometer Threshold

VTACH_

VFB + 1.0

VFB +3

12V fan, 0 < VFB < 9V

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

Output Source Current

ISOURCE

Output Sink Current

ISINK

Output Voltage Range

VOUT

0.3

VCC - 0.3

VFB + 0.5

VFB +1.5

Tachometer Input Impedance

RTACH_

100

150

Supply Voltage

VCC

3.0

5.5

Supply Current

ICC

DAC Differential Nonlinearity

LSB

Useful DAC Resolution

bits

Feedback Input Impedance

RFB

100

150

Output Sink Current

IGPIO_

CONDITIONS

Guaranteed monotonicity on FB (Note 1)

VOUT = VCC - 1.8V

Measured at FB (Note 1)

VOUT = 0.5V

IOUT = ±100µA

5V fan, 0 < VFB < 4.5V

0 < VFB < 9V

0 < VTACH < 9V

VGPIO_ = 0.4V

Full-on mode, IOUT = 0

0.8

VIL(GPIO_)

Input High Voltage

VCC

≤ 3.6V

VIH(GPIO_)

VCC > 3.6V

Pullup Resistor

RGPIO_

100

TACHOMETER INPUTS (TACH_)

FEEDBACK (FB)

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

POWER SUPPLY (VCC)

OUTPUT (OUT)

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