SLVSFE3B November 2020 – May 2021 TPS2661
TPS26611 and TPS26612 devices feature an EN pin for externally controlling the device through a GPIO pin. To enable the device, EN pin can be left floating. It is internally pulled up with V(EN).
EN can also be made high with external voltage more than V(ENR) but less that or equal to 5 V. The internal FETs are turned off when EN is pulled below V(ENF). EN pin can source and sink a current of I(EN_LKG). See Electrical Characteristics for V(ENF), V(ENR) and I(EN_LKG). The EN feature of TPS2661x helps the system designer to design universal voltage and current analog inputs / outputs where a lot of pin multiplexing options are made available to the end user. For turn-on and turn-off delay with EN pin, see tON_EN_dly and tOFF_EN_dly in Timing Requirements. Figure 8-19 and Figure 8-20 illustrate the turn-on and turn-off control with enable pin.