SNVSBK2 September 2019 LP8733
There are two reset methods implemented on the LP8733xx:
An software reset occurs when 1 is written to the SW_RESET bit. The bit is automatically cleared after writing. This event disables all the regulators immediately, drives the GPO or GPO2 signals low, resets all the register bits to the default values, and loads the OTP bits (see Figure 22). The I2C interface is not reset during a software reset.
If the VANA supply voltage falls below the UVLO threshold level, then all the regulators are disabled immediately, the GPO or GPO2 signals are driven low, and all the register bits are reset to the default values. When the VANA supply voltage transitions above the UVLO threshold level, an internal POR occurs. The OTP bits are loaded to the registers and a startup is initiated according to the register settings.