ZHCSI22E October 2017 – August 2019 TPS2662
The internal FETs and the load current can be switched off by pulling the SHDN pin below 0.9 V threshold with a micro-controller GPIO pin or can be controlled remotely with an opto-isolator device as shown in Figure 45 and Figure 46. The device quiescent current reduces to 10 μA (typical) in shutdown state. To assert SHDN low, the pull down must sink at least 10 µA at 400 mV. To enable the device, SHDN must be pulled up to at least 1.8 V. Once the device is enabled, the internal FETs turnon with dVdT mode.