27.5.1 Voltage Regulators

The main regulators output supply level is automatically defined by the Sleep mode selected in the Power Manager module.

The VDDCORE supplies (VDDCORE_SW, VDDCORE_RAM, VDDCORE_BU, VDDCORE_USB if enabled in Standby mode).

This is highly recommended to activate charge pumps when VDDA/VDDIO is too low. The control of Charge pump n (n = 0,1) is managed by setting the corresponding bit in VREGCTRL.CPEN[1:0]. When CPEN[n] bit is set, the enable and auto-enable bits of the charge pump[N] are set. In standby mode, the charge pumps are automatically turned OFF except if a consumer (PTC, ADC or AC) of the charge pump is requesting the charge pump.