LM27SOT-23,±3˚C Accurate, 120˚C-150˚C Factory PresetThermostatGeneral DescriptionThe LM27 is a precision, single digital-output, low-powerthermostat c

Ordering InformationFor more detailed information on the suffix meaning see the part number template at the end of the Electrical Characteris-tics Sec

Absolute Maximum Ratings (Note 1)Input Voltage 6.0VInput Current at any pin (Note 2) 5mAPackage Input Current(Note 2) 20mAPackage Dissipation at TA= 2

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the devi

Functional DescriptionLM27 OPTIONSThe LM27 can be factory programmed to have a trip pointanywhere in-between 120˚C to 150˚C.Applications HintsAFTER-AS

Applications Hints (Continued)TABLE 1. Resistive compensation for capacitiveloading of VTEMPCLOADR(Ω)≤100pF 01nF 820010nF 3000100nF 1000≥1µF 430NOISE

Typical Applications20030703Note: The fan’s control pin has internal pull-up. The 10k pull-down sets a slow fan speed. When the output of the LM27 goe

Typical Applications (Continued)20030722FIGURE 7. Audio Power Amplifier Thermal Protection20030723FIGURE 8. Simple ThermostatLM27www.national.com 8

Physical Dimensions inches (millimeters)unless otherwise noted5-Lead Molded SOT-23 Plastic Package, JEDECOrder Number LM27CIM5 or LM27CIM5XNS Package