A hybrid switching converter with a single inductor and multiple outputs, configured to convert an input voltage to a first output voltage and a second output voltage, the hybrid switching converter comprising:
- a sub-switching converter configured to convert the input voltage to an intermediate voltage;
- a first output switch configured to turn ON during a first inductance period to convert the intermediate voltage to the first output voltage based on a first time-division signal;
- and
- a second output switch configured to turn ON during a second inductance period to convert the intermediate voltage to the second output voltage based on a second time-division signal;
- wherein the sub-switching converter comprises:
- a switched capacitor voltage divider circuit configured to perform a switched-capacitor operation to convert a first voltage to a first set of divided voltages with two different voltage levels by controlling a plurality of switches during the first inductance period based on a first set of pulse-width modulation (PWM) signals, and perform a switched-capacitor operation to convert the first voltage to a second set of divided voltages with two different voltage levels by controlling the plurality of switches during the second inductance period based on a second set of PWM signals;
- an inductor having a first terminal coupled to the switched capacitor voltage divider circuit and a second terminal coupled to a second voltage;
- wherein, during the first inductance period, the first terminal of the inductor is switched between the two voltage levels of the first set of divided voltages based on the first set of PWM signals;
- wherein, during the second inductance period, the first terminal of the inductor is switched between the two voltage levels of the second set of divided voltages based on the second set of PWM signals;
- and
- a control circuit configured to generate the first set of PWM signals, the second set of PWM signals, the first time-division signal, and the second time-division signal, to time-divisionally control the plurality of switches, the first output switch, and the second output switch, such that the same inductor is periodically magnetized and demagnetized during the first and second inductance periods to perform power conversion between the first voltage and the second voltage, and to correspondingly generate the first output voltage and the second output voltage during the first and second inductance periods, respectively;
- wherein the first voltage and the second voltage respectively correspond to one of the input voltage and the intermediate voltage;
- wherein the control circuit is further configured to regulate the first output voltage to a first target voltage based on a first feedback signal related to the first output voltage during the first inductance period, and regulate the second output voltage to a second target voltage based on a second feedback signal related to the second output voltage during the second inductance period;
- wherein the hybrid switching converter with a single inductor and multiple outputs operates in a boundary conduction mode (BCM) or a discontinuous conduction mode (DCM) during the first and second inductance periods.