Datasheet

• VDDCORE – Serves as the internal voltage regulator output in linear mode, depending on the
powering configuration. It powers the VSW core power domain and the VDDBU backup domain,
memories, peripherals, DFLL48M, FDPLL200M, and RAMs. Voltage is 1.2V typical.
• The Automatic Power Switch is a configurable switch that selects between VDD and VBAT as supply
for the internal output VSWOUT, see the figure in 7.1 Power Domain Overview.
The same voltage must be applied to both VDDIO and VDDANA. This common voltage is referred to as
VDD in the data sheet.
VDDIOB voltage level must be equal or lower than VDDIO.
The ground pins, GND, are common to VDDCORE, and VDDIO. The ground pin for VDDANA is
GNDANA.
For decoupling recommendations for the different power supplies, refer to the schematic checklist.
Related Links
59. Schematic Checklist
6.2.9 GPIO Clusters
7.2.3 Typical Powering Schematic
7.2.2 Voltage Regulator
The SAM D5x/E5x internal Main Voltage Regulator has three different modes:
• Linear mode: This is the default mode when CPU and peripherals are running. It does not require an
external inductor.
• Switching mode. This is the most power efficient mode when the CPU and peripherals are running.
This mode can be selected by software on the fly.
• Shutdown mode. When the chip is in backup mode, the internal regulator is off, the VSW core power
domain is OFF. The VDDBU backup domain is powered by the backup regulator (LPVREG).
Note that the Voltage Regulator modes are controlled by the Power Manager.
7.2.3 Typical Powering Schematic
The SAM D5x/E5x uses a single supply from 1.71V to 3.63V.
The following figure shows the recommended power supply connection.
Figure 7-2. Power Supply Connection for Linear Mode Only
VDDANA
VDDIO
VDDCORE
GND
GNDANA
DEVICE
VSW
VBAT (PB03)
(1.71V — 3.63V)
Main Supply
SAM D5x/E5x Family Data Sheet
Power Supply and Start-Up ...
© 2019 Microchip Technology Inc.
Datasheet
DS60001507E-page 48