MAX6620

Quad Linear Fan-Speed Controller

2

Maxim Integrated

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.

VCC to GND ..........................................................-0.3V to +6.0V

FAN_FAIL, SDA, SCL to GND ...............................-0.3V to +6.0V

ADDR, SPINUP_START, DAC_START, WD_START,

All Other Pins to GND..........................................-0.3V to +13.5V

Input Current at DACOUT_ Pins (Note 1) ...............+5mA/-50mA

Input Current at Any Pin (Note 1)..........................................5mA

ESD Protection (all pins, Human Body Model) (Note 2) ...±2000V

28-Pin TQFN (derate 34.5mW/°C above +70°C) ....2758.6mW

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

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

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

Soldering Temperature (reflow) .......................................+260°C

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

PARAMETER

SYMBOL

CONDITION

MIN

TYP

MAX

UNITS

Operating Supply Voltage

3.0

5.5

V

Operating Supply Current

0.25

0.60

mA

0.2

0.5

mA

Quiescent Supply Current

Shutdown mode

3

20

µA

10

12

13.5

4.0

5.0

5.5

V

-18

DACOUT_ Output Current

-16

mA

DACOUT_ Output Voltage

0.05

0.1

V

256/535

256/567

5.54

5.74

5.94

DAC Feedback Voltage at Half

Scale

At DACFB_,

code = 0x100,

2.05

2.25

2.45

V

511/535

511/567

11.25

11.45

11.65

DAC Feedback Voltage at Full

Scale

At DACFB_,

code = 0x1FF,

4.3

4.5

4.7

V

Drive Voltage Resolution

9

Bit

DACFB_ Impedance

1M

Ω

TACH Minimum Input Pulse Width

25

µs

Internal Reference Frequency

Accuracy

(Note 4)

-3

+3

%

Using 32.768kHz crystal

-0.1

+0.1

TACH Count Accuracy (Note 4)

Using on-chip oscillator

-2

+2

%

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifica-

tions do not apply when operating the device beyond its rated operating conditions.

Note 2: Human Body Model, 100pF discharged through a 1.5k

Ω resistor.