Mobile terminal and power management unit thereof

A power management unit (210) of a mobile terminal (200). The power management unit (210) includes a DC-DC converter (212) configured to convert an input voltage into first and second output voltages, the mobile terminal also includes a first boosting circuit (214) configured to boost the first output voltage to a first boosting voltage having a first polarity and to selectively apply the first boosting voltage to a display module (240) of the mobile terminal (200). The mobile terminal (200) also includes a second boosting circuit (216) configured to boost the second output voltage to a second boosting voltage having a second polarity that is opposite to the first polarity of the first boosting voltage, and to selectively apply the second boosting voltage to the display module (240) of the mobile terminal (200).