SNVSBK2 September 2019 LP8733
The PWM mode operation with phase-adding and shedding optimizes efficiency at mid to full load at the expense of light-load efficiency. The LP8733xx converter operates in the PWM mode at load current of about 600 mA or higher. At lighter load current levels the device automatically switches into the PFM mode for reduced current consumption when forced PWM mode is disabled (AUTO mode operation). By combining the PFM and the PWM modes, a high efficiency is achieved over a wide output-load current range.