The synchronous boost converter TPS61288 operates at a quasi-constant frequency pulse width modulation (PWM) in moderate to heavy load condition. Based on the VIN to VOUT ratio, a circuit predicts the required off-time of the switching cycle. At the beginning of each switching cycle, the low-side N-MOSFET switch, shown in Section 8.2, is turned on, and the inductor current ramps up to a peak current that is determined by the output of the internal error amplifier. After the peak current is reached, the current comparator trips, and it turns off the low-side N-MOSFET switch and the inductor current goes through the body diode of the high-side N-MOSFET in a dead-time duration. After the dead-time duration, the high-side N-MOSFET switch is turned on. Because the output voltage is higher than the input voltage, the inductor current decreases. The high-side switch is not turned off until the calculated off-time is reached. After a short dead-time duration, the low-side switch turns on again and the switching cycle is repeated.