The MCP9503 family of devices are temperature switches with ±1°C (typical) accurate factory set output thresholds. These devices are ideal for high power supply systems where an over temperature protection circuit is needed. These devices do not require external components, consume 25 µA (typical), and the factory set thresholds provide simplicity.
In addition, this family of devices provide user selectable 2°C and 10°C (typical) switch hysteresis, and various output configurations. The MCP9503 switch for falling temperature, with the relative hysteresis at the set thresholds. This family of devices is also available with Active-High Push-Pull and Active-Low Open-Drain outputs. The Push-Pull output is ideal for a microcontroller interface while the Open-Drain output can be used for level shifting, wired OR configuration, or as a heater on/off switch.
The MCP9503 operate from 2.7V to 5.5V supply. This family is available with space saving 5-lead SOT-23 package.