Rosenberg, Klein & Lee
Programmable voltage supervisory circuit and method with minimum programming pins and low quiescent current
A programmable voltage supervisory circuit and method with minimum programming pins and low quiescent current is provided to monitor a supply voltage, by which only one programming pin can configure three voltage levels for the threshold voltage to be compared to the supply voltage. The programming pin is connected with a voltage select signal that is defined to be high, low or floating states each determines a setting voltage among three levels corresponding to the three threshold voltages, respectively, by a voltage select circuit. A sample/hold circuit in combination with a switch arrangement is further connected to the voltage select circuit such that the programmable voltage supervisory circuit is only operationable during the duty of a clock and thereby to reduce the power consumption thereof by squeezing the duty.
Richtek Technology, Corp.
G
G05F
inventional
Kent Jing-Meng Chao-Hsuan Cheng-Hsuan
Hwang Liu Chuang Fan