Datasheet

Table Of Contents
7. Power Supply and Start-Up Considerations
7.1 Power Domain Overview
Figure 7-1. Power Domain Block Diagram
VOLTAGE
REGULATOR
VDDIO
VDDCORE
GND
ADC0/1
AC
PTC
VDDANA
GNDANA
PA[7:2]
PB[9:4]
PA[1:0]
BOD33
POR
BOD12
BAT (PB[3])
XOSC32K
OSCULP32K
PB[2:0]
VSW
PA[27:12]
VDDIO
VBAT
VSWOUT
RTC, PM,
SUPC, RSTC
VOLTAGE
REGULATOR
VDDBU
VDDANA
DFLL48M
FDPLL200M
Digital Logic
CPU, Peripherals
VDDCORE
XOSCs
PC[1:0]
PD[1:0]
PC[3:2]
PA[31:30]
VSW
VDDANA
VDDIOB
POR
PA[11:8]
PB[11:10]
PC[7:4]
BACKUP
RAM
SYSTEM
RAM
4KB
4KB
32KB
128KB
DAC
POR
96KB
PB[31:10]
PC[31:10]
PD[21:20]
PD[12:8]
The SAM D5x/E5x power domains are not independent of each other:
VDDCORE, VDDIO and VDDIOB share GND, whereas VDDANA refers to GNDANA.
VDDANA and VDDIO must share the main supply, VDD.
VDDCORE pin is just an output for monitoring the internal voltage regulator. This is not an input for
an external supply.
VSWOUT, VSW and VDDBU are internal power domains.
The VSW pin is for inductor connection to run the Main Voltage Regulator in switching mode.
7.2 Power Supply Considerations
7.2.1 Power Supplies
The SAM D5x/E5x has the following power supply pins:
VDDIO – Powers I/O lines, XOSCn and the internal regulator for VDDCORE. Voltage is 1.71V to
3.63V.
VDDIOB – Powers I/O B lines. Voltage is 1.71V to 3.63V.
VDDANA – Powers I/O lines, the Automatic Power Switch, ADC0/1, AC, DAC and PTC. Voltage is
1.71V to 3.63V.
VBAT – Powers the Automatic Power Switch. Voltage is 1.71V to 3.63V
SAM D5x/E5x Family Data Sheet
Power Supply and Start-Up ...
© 2019 Microchip Technology Inc.
Datasheet
DS60001507E-page 47