The BATFET functions as a load switch between battery and system when input source is not plugged in. By changing the state of BATFET from on to off, systems connected to SYS can be effectively forced to have a power-on-reset. The QON pin supports push-button interface to reset system power without host by changing the state of BATFET.

When the QON pin is driven to logic low for t_{QON_RST} while input source is not plugged in and BATFET is enabled (BATFET_DIS = 0), the BATFET is turned off for t_{BATFET_RST} and then it is re-enabled to reset system power. This function can be disabled by setting BATFET_RST_EN bit to 0.