Abstract

Many dc/dc converters like BQ25758 provide a remote sense pin for regulating the converters output voltage. This remote sense pin can be unable to connect directly to the system load. A cable that connects this regulated output to the system load has a finite resistance. The voltage drop created by this resistance and load current varies with system load. This results in the load voltage being less than the programmed voltage as the system load increases. This application note provides an external analog circuit to compensate for the resistive voltage drop across a cable as a function of system load.