DESCRIPTION
The TK11051 is an accurate temperature controller IC for use over the -30 to +105 °C temperature range. The TK11051 monolithic bipolar integrated circuit contains a temperature sensor, stable voltage reference and a comparator, making the device very useful as an on/off temperature controller. Two external resistors easily set the sensing temperature threshold and hysteresis. Its wide operating voltage range of 2.7 to 6.0 V makes this IC suitable for a number of applications requiring accurate temperature control. The device is in the “on” state when the control pin is pulled to a logic high level.
The TK11051 is available in a miniature SOT-23L-6 surface mount package.

FEATURES
■ Internal Temperature Sensor, Voltage Reference and Comparator
■ Temperature Threshold and Hysteresis Set by Only Two External Resistors
■ Output Logic: High to Low with Increasing Temp.
■ Active High On/Off Control
■ 2.7 to 6.0 V Supply Range
■ Miniature Package (SOT-23L-6)
■ Minimum External Parts Count
■ Low Power Consumption
■ Very Wide Temperature Range

APPLICATIONS
■ Home and Industrial Thermostats
■ Home Appliance Temperature Control
■ Notebook Computer Temperature Monitor
■ Pentium Processor Temperature Monitor
■ Power Supply Overtemperature Protection
■ Copy Machine Overtemperature Protection
■ System Overtemperature Protection