Abstract: A multiple phase dc to dc converter with a shared bootstrap capacitor. In an embodiment, a multiple phase buck converter is disclosed including a plurality of n switching stages, each coupled to a corresponding switching node, each further including a high side driver MOS device coupled between a terminal for a positive voltage supply terminal and the corresponding switching node; and an inductor coupled in parallel between the corresponding switching node and an output terminal configured for providing the DC output voltage; and high side driver control circuitry configured to selectively couple a shared bootstrap capacitor to a gate terminal of each of the high side drivers, wherein the shared bootstrap capacitor is configured to charge a gate capacitance of each of the high side driver MOS devices. Additional embodiments are disclosed.

Abstract: A multiple phase dc to dc converter with a shared bootstrap capacitor. In an embodiment, a multiple phase buck converter is disclosed including a plurality of n switching stages, each coupled to a corresponding switching node, each further including a high side driver MOS device coupled between a terminal for a positive voltage supply terminal and the corresponding switching node; and an inductor coupled in parallel between the corresponding switching node and an output terminal configured for providing the DC output voltage; and high side driver control circuitry configured to selectively couple a shared bootstrap capacitor to a gate terminal of each of the high side drivers, wherein the shared bootstrap capacitor is configured to charge a gate capacitance of each of the high side driver MOS devices. Additional embodiments are disclosed.

Abstract: An apparatus is provided. The apparatus comprises an error amplifier that amplifies the difference between a reference voltage and a feedback voltage, a first variable impedance circuit coupled to the error amplifier that receives a control voltage from the error amplifier, a charge pump coupled to the variable impedance that receives an input voltage from the variable impedance, and a Miller compensator coupled to the charge pump and to the first variable impedance circuit. The Miller compensator receives the output voltage and output current from the charge pump. It also outputs the feedback voltage, adjusts the control voltage, and has a zero-pole that is proportional to a power of the output current of the charge pump.

Abstract: An apparatus is provided. The apparatus comprises an error amplifier that amplifies the difference between a reference voltage and a feedback voltage, a first variable impedance circuit coupled to the error amplifier that receives a control voltage from the error amplifier, a charge pump coupled to the variable impedance that receives an input voltage from the variable impedance, and a Miller compensator coupled to the charge pump and to the first variable impedance circuit. The Miller compensator receives the output voltage and output current from the charge pump. It also outputs the feedback voltage, adjusts the control voltage, and has a zero-pole that is proportional to a power of the output current of the charge pump.