Patent ID: 9035631
Filing Date: 2015-05-19
Classification: G05F

Abstract:
1. An LDO having a phase margin compensation means including a duty cycle calculator, comprising: a power supply unit supplying reference voltage Vref as stabled power of which the voltage level is not changed according to temperature and external environment; a reference voltage generation unit dropping the reference voltage Vref supplied from the power supply unit and outputting reference voltage (Vout a supply voltage output unit dropping the reference voltage Vref supplied from the power supply unit to output a first reference voltage (Vout a comparator comparing the reference voltage (Vout a duty cycle calculator receiving an output signal (pulse signal) from the comparator to count any section of the output signal (pulse signal) by a predetermined frequency, thereby obtaining the duty cycle ratios and output bits according to the counting and the duty cycle ratios and the output bit information fed back to the supply voltage output unit.