Power Supply And Management - Atmel SAM4E-EK User Manual

4.3.5

Power supply and management

The Atmel SAM4E-EK board is supplied with an external 5V DC block through input J1. It is protected by a PolyZen
diode (MN2) and an LC combinatory filter (MN3). The PolyZen is used in the event of an incorrect power supply
connection.
The adjustable LDO regulator MN4 is used for the 3.3V rail main supply. It powers all the 3.3V components on the
board.
Figure 4-4. Power block.
J1 MN2
Power Jack 2.1mm ZEN056V130A24LS
1 1
2
MN4
MIC29302
+5V
2
VIN
1
SD
The SAM4E16 product has different types of power supply pins:
•
VDDIN pin:
Power for the internal voltage regulator, ADC, DAC, and analog comparator power supplies.
The voltage ranges from 1.6V to 3.6V.
•
VDDIO pins:
Power for the Peripherals I/O lines.
The voltage ranges from 1.62V to 3.6V.
•
VDDOUT pin:
Output of the internal voltage regulator.
•
VDDCORE pins:
Power for the core, including the processor, embedded memories, and peripherals.
The voltage ranges from 1.08V to 1.32V.
•
VDDPLL pin:
Power for the PLL A, PLL B and 12MHz oscillator.
The voltage ranges from 1.08V to 1.32V.
Note: VDDPLL should be decoupled and filtered from VDDCORE.
3 1
2
+
C23 C24
100nF 22uF
4
VOUT
5
R9
ADJ
169K 1%
R10
102K 1%
MN3
BNX002-01
3
SV CV
4
SG CG1
5
+
C25
CG2
6
22uF
CG3
+3V3
+
C29 C30
100uF-TAN-6.3V 100nF
+5V
+
C26
220uF-ELE-16V
SAM4E-EK User Guide
42067B−SAM4E−04/2013
11