JAJSFS8 July 2018 BQ25601D
The device supports boost converter operation to deliver power from the battery to other portable devices through USB port. The boost mode output current rating meets the USB On-The-Go 500 mA output requirement. The maximum output current is up to 1.2 A. The boost operation can be enabled if the conditions are valid:
During boost mode, the status register VBUS_STAT bits is set to 111, the VBUS output is 5.15 V and the output current can reach up to 1.2 A, selected through I2C (BOOST_LIM bit). The boost output is maintained when BAT is above VOTG_BAT threshold.
When OTG is enabled, the device starts up with PFM and later transits to PWM to minimize the overshoot. The PFM_DIS bit can be used to prevent PFM operation in either buck or boost configuration.