Rainbow Electronics MAX6660 User Manual
Page 2
MAX6660
Remote-Junction Temperature-Controlled
Fan-Speed Regulator with SMBus Interface
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +3V to +5.5V, V
VFAN
= +12V, T
A
= -40°C to +125°C, unless otherwise specified. Typical values are at V
CC
= +3.3V and
T
A
= +25°C.) (Note 1)
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.
All Voltages Referenced to GND
V
CC
, ADD0, ADD1, SMBDATA,
SMBCLK,
ALERT, OVERT ...................................-0.3V to +6V
V
FAN
, TACH IN, FAN .............................................-0.3V to +16V
DXP, GAIN..................................................-0.3V to (V
CC
+ 0.3V)
DXN.............................................................................-0.3V to 1V
SMBDATA,
ALERT, OVERT Current ...................-1mA to +50mA
DXN Current ......................................................................±1mA
FAN Out Current ..............................................................500mA
ESD Protection (Human Body Model)................................2000V
Continuous Power Dissipation (T
A
= +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C)..........667mW
Operating Temperature Range ........................ -40°C to +125°C
Junction Temperature .....................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYM BOL CONDITIONS
MIN
TYP
MAX
UNITS
ADC AND POWER SUPPLY
V
CC
Supply Voltage
V
CC
3.0
5.5
V
V
FAN
Supply Voltage
V
VFAN
4.5
13.5
V
Operating Supply Current
I
CC
Fan off
250
500
µA
Shutdown Supply Current
I
SHDN
Shutdown
3
10
µA
0.125
°C
Temperature Resolution
11
Bits
T
RJ
= +60°C to +100°C
-1
+1
T
RJ
= +25°C to +125°C
-3
+3
Temperature Error (Note 2)
T
E
T
A
= +85°C,
V
CC
= +3.3V
T
RJ
= -40°C to +125°C
-5
+5
°C
Internal Reference Frequency
Accuracy
+25
-25
%
Temperature Conversion Time
0.25
s
Conversion Rate Timing Error
-25
+25
%
Undervoltage Lockout Threshold
V
UVLO
V
CC
falling
2.50
2.80
3.00
V
Undervoltage Lockout Threshold
Hysteresis
V
HYST
90
mV
Power-On-Reset (POR)
Threshold (V
CC
)
V
CC
rising
1.4
2.0
2.5
V
POR Threshold Hysteresis
90
mV
High level
80
100
120
Remote-Junction Source Current
I
RJ
Low level
8
10
12
µA
DXN Source Voltage
V
DXN
0.7
V