Synchronized time-division wireless power transfer for multiple voltage applications

A wirelessly powered implantable medical device receiving time-division wireless power transfer signals, the wirelessly powered medical device comprising:

• receiver circuitry for receiving the time-division wireless power transfer signals;
• and
• a time division switching module coupled to the receiver for generating multiple supply voltages in response to the time-division wireless power transfer signals, wherein the time division switching module comprises a single-inductor multiple-output (SIMO) DC-DC converter, and wherein the SIMO DC-DC converter comprises multiple switches for supplying each of the multiple supply voltages to different circuitry of the wirelessly powered implantable medical device, the SIMO DC-DC converter comprising an envelope detector coupled to the multiple switches and configured to synchronize operation of the multiple switches to duty cycles of the time-division wireless power transfer signals for supplying one of the multiple supply voltages to a corresponding one of the different circuitry of the wirelessly powered implantable medical device during a corresponding one of the duty cycles of the time-division wireless power transfer signals having an amplitude corresponding to the one of the multiple supply voltages.