SLVUBX4A November 2020 – February 2022 LP8764-Q1
Terminal J9, labeled VCCA in Figure 2-1, can accept wire gauges up to 14 AWG. The voltage supplied must be within the input range of the device, 2.8 V to 5.5 V. The power supply providing the input to VCCA is required to supply 135 % of the output power. Once power has been supplied to VCCA, the GPIO4 / ENABLE jumper can be used to power on the output rails (in LP87644Q1EVM GPIO2 can be used to control BUCK4 after GPIO4 has been set high). The default ON Request for the controller device is the ENABLE pin which is a level sensitive input. Please refer to LP8764-Q1 datasheet for more details.
Figure 2-1 shows the LP8764x-Q1 EVM (controller).