This paper proposed a modified two-stage cascaded hybrid buck converter with reduced conduction loss, and simplified interleaving PWM circuit. The proposed converter reduces the conduction loss with less total switches and high-voltage power switches. Also, the proposed converter achieves the inherent self-balanced flying capacitor voltages. Besides, the proposed converter simplifies the interleaving PWM circuit with the single ramp signal by digital logic. Moreover, the proposed converter avoids extra supply to feed the drivers. This work simulated with a 130-nm BCD technology, the proposed converter regulates a 0.4 V – 1.2 V output from a 5 V input voltage, and it achieves the high peak and 1A-heavy-load efficiencies of 96% and 92.5%, respectively.