ZHCSI22F October 2017 – December 2021 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 9-15 and Figure 9-16. 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. After the device is enabled, the internal FETs turn on with dVdT mode.