Abstract: The present disclosure provides a voltage converter for simulating inductor current control, which simulates an inductor current of a power level circuit according to operation signals generated by a control circuit, an input voltage, and an output voltage, thereby achieving detection of the inductor current by using a non-sensing method. Therefore, compared to a conventional sensing method, the voltage converter of the present disclosure can reduce use of a sensing circuit to reduce costs, and an inductor current ramp generated thereby has no distortion. Accordingly, the voltage converter of the present disclosure can improve the accuracy of inductor current detection.

Abstract: A voltage converter for fast load transient response adapted for a boost type voltage converter determines whether a transient state occurs, that is, whether a load is converted from a heavy load to a light load, according to a transient detection circuit. When the transient state occurs, an inductive current quickly drops to a corresponding current value to accelerate the rate of an output voltage returning to a stable voltage value, and to shorten a time of load transient response, so as to avoid affecting the performance of a load, especially a sensitive load.

Abstract: A constant on-time switching converter and a clock synchronization circuit are provided, which generate a synchronization signal according to a clock signal, an input voltage, and an output voltage. The synchronization signal will be synchronized with a period length of the clock signal, thereby acquiring the duty cycle of the constant on-time switching converter. People in the business can accordingly avoid the interference with the synchronization signal and other major clock signals, to prevent electromagnetic interference (BMI) generation.