Rainbow Electronics MAX6670 - Manual (Page 2)

MAX6668/MAX6670
Remote Temperature Switches with Integrated
Fan Controller/Driver
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V DD = +3V to +3.6V, T A = -40°C to +125°C, unless otherwise noted. Typical values are at V DD = +3.3V and T A = +25°C.)
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.
V DD to GND ..............................................................-0.3V to +6V
PGND to GND .......................................................-0.3V to +0.3V
FANOUT to GND ....................................................-0.3V to +15V
DXN to GND ..........................................................-0.3V to +0.8V
DXP,
WARN, HYST, FORCEON, OT...........-0.3V to (V
DD + 0.3V)
Current into V DD , GND, DXP, DXN, WARN, HYST,
FORCEON, OT..............................................................±20mA
Current into FANOUT, PGND ........................................ ±300mA
Continuous Power Dissipation (T A = +70°C)
8-Pin µMAX (derate 4.1mW/°C above +70°C) .............333mW
10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW
Operating Temperature Range .........................-40°C to +125°C
Storage Temperature Range .............................-60°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER SUPPLY
Power-Supply Range V DD 3 3.6 V
Average Supply Current I DD 110 200 µA
Operating Current During sampling 400 650 µA
Power-On Reset (POR) Threshold POR V
DD
falling edge 1 1.5 2.0 V
POR Threshold Hysteresis 50 mV
TEMPERATURE SENSOR
T RJ = +40 °C to +75°C (Note 1),
T
A
= 0 °C to +85°C, V
DD
= +3.3V
±1 ±2.2
FANOUT Temperature
Threshold Accuracy
∆T
TH
T RJ = +40 °C to +75°C (Note 1),
T A = -40 °C to +125°C, V
DD = +3.3V
±1 ±4
°C
HYST = GND 4
HYST = float 8 MAX6670
HYST = V DD 12
FANOUT Temperature
Threshold Hysteresis
T HYST
MAX6668 8
°C
WARN Temperature Threshold
(MAX6670 Only)
Relative to FANOUT temperature threshold +15 °C
OT Temperature Threshold
(MAX6670 Only)
Relative to FANOUT temperature threshold +30 °C
Supply Sensitivity of Temperature
Threshold
1 1.6 °C/V
Temperature Sample Frequency 3.3 4 Hz
FAN DRIVE OUTPUT
FANOUT Output Voltage Low V OL I SINK = 250mA 0.5 1 V
Thermal Shutdown 170 °C
Thermal Shutdown Hysteresis 20 °C
LOGIC INPUT/OUTPUT
FORCEON Input High Voltage V IH
0.8 x
V DD
V