This paper proposes a dual-charging-path dual-inductor hybrid (DCP-DIH) converter that can charge two inductors simultaneously to improve the step-up load transient response. The proposed scheme only introduces one additional switch and capacitor to form a dual charging path during step-up load transient response. All power switches are integrated using 5 V transistors with 0.25 µm HV BCD process. Using type-3 PWM control combined with a fast load transient detector, simulation results show that the proposed circuit achieves 55.4 % voltage drop and 23.6 % recovery time reduction compared to the conventional DIH converter for load transient step from 20 mA to 4 A.