Ultra-small high-accuracy voltage detectors suit automotive applications

Torex Semiconductor has developed a range of voltage detectors with a delay function and sense pin isolated external hysteresis adjustment, as well as an internal 100V surge voltage protection function. The ultra-small high-accuracy XC6132/XC6133/XC6134 series voltage detectors have sense pin isolation and external delay capacitance. The devices offer high accuracy and low quiescent current. The sense pin is isolated from the power input pin to enable monitoring of the voltage of another power supply, and the output can be held in the detect state even when the voltage of the monitored power supply drops to 0V. The sense pin is optimum for cases where you need to detect a wide range of voltages from low to high, and the detect and release voltages can be set as desired using an external resistance. An internal delay circuit is provided, and by connecting a capacitor to the Cd/MRB pin, any release delay or detect delay can be set. This pin can also be used as a manual reset pin. The XC6132/XC6134 series includes a hysteresis external adjustment pin that allows the hysteresis to be adjusted as desired with a single resistor. The ICs are ideal as voltage detectors for voltage monitoring of vehicle batteries during cranking and power supplies with large voltage fluctuations such as electrical double layer. The XC6132 series also has an internal voltage protection circuit that protects the IC even when over-voltage is applied to the input, says the company.