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 20uA 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.