Many devices have an option to measure the current through the switch, through a dedicated pin such as the CS/SNS pin that has been configured to measure current by the SEL pins. Through the use of a current mirror and external resistor, the SNS pin outputs a proportional current that changes the voltage across the sense resistor that can be measured by an ADC that represents the actual load current. This is available on all devices in the TPSxHxxxB and TPSxHBxxx family of smart high side switches. The architecture of how current mirror works in the TPSxHxxxB devices is explained in High Accuracy Current Sense of Smart High Side Switches. The implementation and use of current sense have sensitive factors that can be leveraged to maintain accurate values on the SNS pin. These factors range from within the operating device to connections outside the device.