User guide

MAX6665
Fan Controller/Driver with Factory-
Programmed Temperature Thresholds
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
Note 1: Specifications over temperature are guaranteed by design. Parts are 100% production tested at 10°C below the tempera-
ture threshold.
V
DD
to GND..............................................................-0.3V to +6V
FANOUT to GND ....................................................-0.3V to +28V
FORCEON, HYST, FANON to GND............-0.3V to (V
DD
+ 0.3V)
WARN, OT to GND ...................................................-0.3V to +6V
FANOUT Continuous Current............................................400mA
All Other Pins ....................................................................±20mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin SO (derate 19.6mW/°C above +70°C).............1568mW
Operating Temperature Range .........................-40°C to +125°C
Junction (storage) Temperature Range ............-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(V
DD
= +2.7V to +5.5V, T
A
= -40°C to +125°C. Typical values are at V
DD
= +3.3V and T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply Voltage V
DD
pin 2.7 5.5 V
Supply Current No load 65 200 µA
FANOUT Drive Voltage FANOUT pin 26 V
V
FANOUT
< 0.8V 250
FAN OUT Outp ut C ur rent C ap ab ility
V
FANOUT
< 0.6V, T
A
≤ T
TH
+10°C, V
CC
≥ +3.3V 250
mA
FANOUT Leakage Current V
FANOUT
= 26V, T
A
= +60°C3µA
MAX6665ASA40 40
MAX6665ASA45 45
MAX6665ASA50 50
MAX6665ASA55 55
MAX6665ASA60 60
MAX6665ASA65 65
FANOUT Threshold, T
TH
MAX6665ASA70 70
°C
FANOUT Threshold Error -3 ±1+3°C
HYST is unconnected 1
HYST ≤ 0.3V
DD
4
FANOUT Hysteresis
HYST ≥ 0.7V
DD
8
°C
WARN Threshold Relative to FANOUT temperature threshold +15 °C
OT Threshold Relative to FANOUT temperature threshold +30 °C
WARN and OT Hysteresis 2 °C
FANON Output High Voltage I
FANON
= 0.5mA source 2.0 V
FANON Output Low Voltage I
FANON
= 0.5mA sink 0.7 V
I
WARN
= 1.2mA or I
OT
= 1.2mA sink 0.3
W ARN and O T Outp ut V ol tag e Low
I
WARN
= 20mA or I
OT
= 20mA sink 0.5
V
Open-Drain Leakage Current V
WARN
= 5.5V or V
OT
= 5.5V 0.1 µA
Input Low Voltage FORCEON and HYST pins 0.3V
DD
V
Input High Voltage FORCEON and HYST pins 0.7V
DD
V
FORCEON connected to V
DD
or GND -1 +1
Input Current
HYST connected to V
DD
or GND -15 +15
µA