RT1720
Description
The RT1720 is an over-voltage and over-current protection circuit. It monitors a circuit’s input voltage and current with its adjustable over-voltage and over-current thresholds and drives an external N-MOSFET switch to connect the input to the output voltage only when it is safe. Its wide input voltage range makes it useful for high-voltage applications and in systems that experience large transient voltages and currents, such as automotive, tele, and industrial applications.
During over-voltage events, the RT1720 quickly reduces the gate drive of the external MOSFET to regulate the output voltage at the level chosen by its external FB resistors. During over-current events, when the load draws excessive current, the RT1720 reduces the gate drive to regulate the output current at the level set by its external current sense resistor. In both cases the output voltage or current is linearly regulated, thermally stressing the MOSFET load switch. However, an externally-adjustabl...
