SAM3N0C Atmel Corporation, SAM3N0C Datasheet - Page 16

• Manufacturer Part Number: SAM3N0C
• Manufacturer: Atmel Corporation

5. Power Considerations
5.1
5.2
5.3
16
Power Supplies
Voltage Regulator
Typical Powering Schematics
SAM3N
The SAM3N product has several types of power supply pins:
The SAM3N embeds a voltage regulator that is managed by the Supply Controller.
This internal regulator is intended to supply the internal core of SAM3N. It features two different
operating modes:
For adequate input and output power supply decoupling/bypassing, refer to ”Voltage Regulator”
in the “Electrical Characteristics” section of the datasheet.
The SAM3N supports a 1.62V-3.6V single supply mode. The internal regulator input connected
to the source and its output feeds VDDCORE.
As VDDIN powers the voltage regulator and the ADC/DAC, when the user does not want to use
the embedded voltage regulator, it can be disabled by software via the SUPC (note that it is dif-
ferent from Backup mode).
• VDDCORE pins: Power the core, including the processor, the embedded memories and the
• VDDIO pins: Power the Peripherals I/O lines, Backup part, 32 kHz crystal oscillator and
• VDDIN pin: Voltage Regulator, ADC and DAC Power Supply. Voltage ranges from 1.8V to
• VDDPLL pin: Powers the PLL, the Fast RC and the 3 to 20 MHz oscillators. Voltage ranges
• In Normal mode, the voltage regulator consumes less than 700 µA static current and draws
• In Backup mode, the voltage regulator consumes less than 1 µA while its output (VDDOUT)
peripherals. Voltage ranges from 1.62V to 1.95V.
oscillator pads. Voltage ranges from 1.62V to 3.6V
3.6V for the Voltage Regulator
from 1.62V to 1.95V.
60 mA of output current. Internal adaptive biasing adjusts the regulator quiescent current
depending on the required load current. In Wait Mode quiescent current is only 7 µA.
is driven internally to GND. The default output voltage is 1.80V and the start-up time to reach
Normal mode is less than100 µs.
Figure 5-1
shows the power schematics.
11011A–ATARM–04-Oct-10