51.2 Power Supply

The SAM L10/L11 supports a single or dual power supply from 1.62V to 3.63V. The same voltage must be applied to both VDDIO and VDDANA.

The internal voltage regulator has the following modes:

• Linear mode: This mode does not require any external inductor. This is the default mode when CPU and peripherals are running.
• Switching mode (Buck): The most efficient mode when the CPU and peripherals are running.
• Low-Power (LP) mode: This is the default mode used when the device is in Standby mode.

Selecting between Switching mode and Linear mode can be done by software on the fly, but the power supply must be designed according to which mode to be used.