ADM1027

ABSOLUTE MAXIMUM RATINGS*
Positive Supply Voltage (V_CC) . . . . . . . . . . . . . . . . . . . . . 6.5 V
Voltage on 12 VIN Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 V
Voltage on Any Other Input or Output Pin . . . . 0.3 V to +6.5 V
Input Current at Any Pin . . . . . . . . . . . . . . . . . . . . . . . . ±5 mA
Package Input Current . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Maximum Junction Temperature (T_{J MAX}) . . . . . . . . . . 150
Storage Temperature Range . . . . . . . . . . . . . 65 to +150
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . 215
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2000 V
*Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

The ADM1027 dBCOOL controller is a complete systems monitor and multiple PWM fan controller for noise sensitive applications requiring active system cooling. It can monitor 12 V, 5 V, 2.5 V CPU supply voltage, plus its own supply voltage. It can monitor the temperature of up to two remote sensor diodes, plus its own internal temperature. It can measure an  control the speed of up to four fans so that they operate at the lowest possible speed for minimum acoustic noise. The automatic fan speed control loop optimizes fan speed for a given temperature. Once the control loop parameters are programmed, the ADM1027 can vary fan speed without CPU intervention.