A power supply system, comprising: a first voltage regulator; a second voltage regulator, outputs of the first voltage regulator and the second voltage regulator being coupled to an output of the power supply system; and a current balancer circuit configured to adjust an output current (Iout1) of the first voltage regulator based on determined headrooms (V DS) of the first voltage regulator and the second voltage regulator; characterized in that: the current balancer circuit is configured to adjust the output current (Iout1) of the first voltage regulator based on whether the determined headroom (V DS) of the first voltage regulator is within a first headroom range and whether the determined headroom (V DS) of the second voltage regulator is within a second headroom range; an upper limit of the first headroom range or the second headroom range is less than a lower limit of a third headroom range associated with the first voltage regulator or the second voltage regulator operating in saturation, respectively; and a lower limit of the first headroom range or the second headroom range is greater than an upper limit of a fourth headroom range associated with the first voltage regulator or the second voltage regulator operating in triode, respectively. a first voltage regulator; a second voltage regulator, outputs of the first voltage regulator and the second voltage regulator being coupled to an output of the power supply system; and a current balancer circuit configured to adjust an output current (Iout1) of the first voltage regulator based on determined headrooms (V DS) of the first voltage regulator and the second voltage regulator; characterized in that: the current balancer circuit is configured to adjust the output current (Iout1) of the first voltage regulator based on whether the determined headroom (V DS) of the first voltage regulator is within a first headroom range and whether the determined headroom (V DS) of the second voltage regulator is within a second headroom range; an upper limit of the first headroom range or the second headroom range is less than a lower limit of a third headroom range associated with the first voltage regulator or the second voltage regulator operating in saturation, respectively; and a lower limit of the first headroom range or the second headroom range is greater than an upper limit of a fourth headroom range associated with the first voltage regulator or the second voltage regulator operating in triode, respectively. the current balancer circuit is configured to adjust the output current (Iout1) of the first voltage regulator based on whether the determined headroom (V DS) of the first voltage regulator is within a first headroom range and whether the determined headroom (V DS) of the second voltage regulator is within a second headroom range; an upper limit of the first headroom range or the second headroom range is less than a lower limit of a third headroom range associated with the first voltage regulator or the second voltage regulator operating in saturation, respectively; and a lower limit of the first headroom range or the second headroom range is greater than an upper limit of a fourth headroom range associated with the first voltage regulator or the second voltage regulator operating in triode, respectively.