DC-DC converter with fast voltage charging circuitry for Wi-Fi cellular applications

摘要

The present disclosure relates to a direct current (DC)-DC converter associated with a radio frequency transceiver, which includes a transceiver capacitor. The disclosed DC-DC converter includes a battery terminal configured to provide a battery voltage, a charge pump coupled to the battery terminal and configured to provide a boosted voltage based on the battery voltage, a power inductor is coupled between the charge pump and the transceiver capacitor, and fast voltage charging circuitry with a fast-path block that is coupled between the charge pump and the transceiver capacitor. Herein, the transceiver capacitor is capable to be charged with the boosted voltage through the power inductor. The fast-path block is parallel with the power inductor and configured to provide an extra charging path to the transceiver capacitor, so as to accelerate a charging speed of the transceiver capacitor.