Infineon Technologies Ag

Ardit Tabaku

Mihai-Alexandru Ionescu

Michael Asam

This disclosure describes a charge pump circuit comprising a plurality of switches configured to control phases of the charge pump circuit for charging a first capacitor, a second capacitor and a third capacitor. The phases may include: a first phase that charges the first capacitor to a first voltage based on an input voltage; a second phase that charges the second capacitor to a second voltage based on the first voltage and the input voltage; a third phase that charges the first capacitor to a third voltage based on the input voltage; and a fourth phase that charges the third capacitor to a fourth voltage based the second voltage, the third voltage, and the input voltage. In some examples, one or more of the capacitors are charged with duty cycles that are less than 50 percent.

Multi-stage charge pump circuit

Voltage supply circuitry includes a high-side pin and a low-side pin configured to couple to a storage element and an output pin. The voltage supply further includes a high-side switching element configured to electrically couple the positive supply pin and the low-side pin based on a high-side control signal and a low-side switching element configured to electrically couple the reference supply pin and the low-side pin based on a low-side control signal. The voltage supply further including driver circuitry configured to generate the high-side control signal and the low-side control signal for operating in a charge pump mode when the storage element is arranged in a charge pump configuration with the voltage supply circuitry and to generate the high-side control signal and the low-side control signal for operating in a boost converter mode when the storage element is arranged in a boost converter configuration with the voltage supply circuitry.

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Ottobrunn, Germany

Ardit Tabaku