Abstract: A boost DC-DC converter with an inrush current protection device is disclosed. The boost DC-DC converter includes an output stage, including a high-side transistor for providing an output current, a low-side transistor for sinking the output current, a pass transistor for passing through the output current to an output node, an inductor coupled to the high-side transistor, the low-side transistor, and the pass transistor for passing through the output current, and an output capacitor coupled to the pass transistor for boosting an output voltage at the output node, and a protection diode parallel connected to the inductor and the low-side transistor for preventing an inrush current from passing through the inductor and the pass transistor to the output node.

Abstract: A current detection device for a buck-boost DC-DC converter is disclosed. The current detection device comprises a detecting terminal coupled to two low-side transistors of the buck-boost DC-DC converter, and only one current sensing unit for detecting a current flowing through the detecting terminal, to detect an output current of the buck-boost DC-DC converter.