General Description
The MAX6660 is a remote temperature sensor and fan speed regulator that provides a complete fan-control
solution. The remote temperature sensor is typically a common-collector PNP, such as a substrate PNP of a
microprocessor, or a diode-connected transistor, typically a low-cost, easily mounted 2N3904 NPN type or 2N3906 PNP type.

FEATUREs
♦Integrated Thermal Sensing and Fan-Regulation Solution
♦Programmable Fan Threshold Temperature
♦Programmable Temperature Range for Full-Scale Fan Speed
♦Accurate Closed-Loop Fan-Speed Regulation
♦On-Chip Power Device Drives Fans Rated Up to 250mA
♦Programmable Under/Overtemperature Alarms
♦SMBus 2-Wire Serial Interface with Timeout (Cannot “Lock Up” the SMBus)
♦Supports SMBus Alert Response
♦ACPI Compatible, Including OVERTSystem Shutdown Function
♦±1°C (+60°C to +100°C) Thermal-Sensing Accuracy
♦MAX6660EVKIT Available

APPLICATIONs
PC
Notebooks
Telecom Systems
Industrial Control Systems
Servers
Workstations