ISL6117

This family of fully featured hot swap power controllers  targets applications in the +2.5V to +12V range. The  ISL6115 is for +12V control, ISL6117 for +3.3V and the ISL6120 for +2.5V control  applications. Each has a hard wired undervoltage (UV)  monitoring and reporting threshold level approximately 80%  of the aforementioned voltage.

The ISL6115 has an integrated charge pump allowing  control of up to +16V rails using an external N-Channel  MOSFET whereas the other devices utilize the +12V bias  voltage to fully enhance the N-channel pass FET. All ICs  feature programmable overcurrent (OC) detection, current  regulation (CR) with time delay to latch off and soft start.

The current regulation level is set by 2 external resistors;  RISET  sets the CR Vth and the other is a low ohmic sense  element across which the CR Vth is developed. The CR  duration is set by an external capacitor on the CTIM pin  which is charged with a 20A current once the CR Vth level  is reached. If the voltage on the CTIM cap reaches 1.9V the  IC then quickly pulls down the GATE output latching off the  pass FET.

This family although designed for high side switch control  the ISL6116, ISL6117, ISL6120 can also be used in a low  side configuration for control of much higher voltage  potentials.