1.4 Regulator Selection During SleepWalking
Microchip Cortex-M processor-based MCUs employ different voltage regulator architectures to balance power consumption and wake-up performance during SleepWalking. The Power Manager (PM) automatically selects the appropriate regulator based on the Sleep mode, peripheral activity, and user configuration. The following sections describe the regulator behavior across different device families as an example.
| MCU Family | Main Regulator | Low-Power Regulator | PLL Regulator | Primary Control Register |
|---|---|---|---|---|
| PIC32CM PL10 | LDO | ULP | – | SUPC.VREG.RUNSTDBY |
| PIC32CM JH00 | LDO | LPVREG | – | SUPC.VREG.RUNSTDBY, STDBYCFG.VREGSMOD |
| PIC32CM GV00 | LDO | Regulator in LP mode | – | SYSCTRL.VREG.RUNSTDBY |
| PIC32CM LE/LS | LDO or Buck | LPVREG | VREGPLL | SUPC.VREG.RUNSTDBY, SUPC.VREGPLL.RUNSTDBY, STDBYCFG.VREGSMOD |
| PIC32CM SG00/GC00 | VREGSW (capless) | VREGSW in LP mode | VREGRAM | SUPC.VREGCTRL |
| SAM L10/L11 | LDO or Buck | LPVREG | – | SUPC.VREG.RUNSTDBY, STDBYCFG.VREGSMOD |
| SAM L21 | LDO or Buck | LPVREG | – | SUPC.VREG.RUNSTDBY, STDBYCFG.VREGSMOD |
| SAM C21 | LDO | LPVREG | – | SUPC.VREG.RUNSTDBY, STDBYCFG.VREGSMOD |
| SAM D5x/E5x | LDO or Buck | – | – | SUPC.VREG.SEL, STDBYCFG.FASTWKUP |
Attention: Regulator architectures, naming conventions, and
available configuration options vary across device families. Refer to the Supply Controller
(SUPC) and Power Manager (PM) chapters in the specific device datasheet for the regulator
options and standby configuration available on the device being used.