Abstract: A GaN based under voltage lock-out circuit includes a supply voltage input, a signal output, and a reference voltage circuit interface. Also included is a first transistor having a source and gate both coupled to the supply voltage input, and a drain coupled to a first port of the reference voltage circuit interface. Further included is a second transistor having a gate coupled to the drain of the first transistor via a second port of the reference voltage circuit interface, a drain coupled to the signal output and coupled, via a first resistor, to the supply voltage input, and a source coupled, via a second resistor, to a ground potential. Also included is a third transistor having a gate coupled to the signal output, a drain coupled through a third resistor to the source of the first transistor, and a third source coupled to the drain of the second transistor.

Abstract: An integrated circuit includes a substrate, a GaN FET power switch disposed on the substrate, and a totally-GaN-based driver disposed on the substrate and coupled to the GaN FET power switch. The totally-GaN-based driver has an input terminal for receiving a supply voltage and includes an under-voltage detector having an output terminal. The under-voltage detector outputs a UVLO signal when the supply voltage is below a low-to-high threshold value, and does not output the UVLO signal when the supply voltage is above the low-to-high threshold value. The totally-GaN-based driver includes a pulse stretcher having an input terminal coupled to the output terminal of the under-voltage detector, and an output terminal for outputting a stretched_UVLO signal for a predetermined amount of time after the supply voltage first rises above the low-to-high threshold value.

Abstract: An integrated circuit includes a substrate, a GaN FET power switch disposed on the substrate, and a totally-GaN-based driver disposed on the substrate and coupled to the GaN FET power switch. The totally-GaN-based driver has an input terminal for receiving a supply voltage and includes an under-voltage detector having an output terminal. The under-voltage detector outputs a UVLO signal when the supply voltage is below a low-to-high threshold value, and does not output the UVLO signal when the supply voltage is above the low-to-high threshold value. The totally-GaN-based driver includes a pulse stretcher having an input terminal coupled to the output terminal of the under-voltage detector, and an output terminal for outputting a stretched_UVLO signal for a predetermined amount of time after the supply voltage first rises above the low-to-high threshold value.