Power Supplies - Atmel AT91SAM9G45-EKES User Manual

4.2.5

Power Supplies

The SAM9G45 Board contains four regulated power supplies:
3.3 VDC Supply
1.8 VDC Supply
1.0 VDC Core Supply
1.0 VDC Core UTMI Supply, PLL
The outputs of these regulated power supplies
board.
The 3.3 VDC Supply is generated by an LTC1765-3.3 chip. It accepts VIN 5 VCC power and outputs a
regulated +3.3 V to most other circuits in the SAM9G45-VB.
The 1.8 VDC Supply (VDDIOM0, VDDIOM1) is generated by an LT1765-1.8. It is powered by VIN
5 VCC power and outputs a regulated +1.8V.
The 1.0 VDC Core Supply (VDDCORE) is generated by a TPS60500 IC. It is powered by the VIN
5 VCC power.
The 1.0 VDC Core Supply (VDDUTMIC, VDDPLLUTMI and VDDPLLA) is generated by a CMOS
voltage regulator R1100D series. It is powered by the output of the 3.3 VDC Supply.
Note: 1. Corresponding test points (TP1 to TP4, GND) are used with jumpers (JP1.1 to JP7) to
AT91SAM9G45-EKES User Guide
permit probing of these voltages.
1
are distributed as necessary to each part of the circuit
Board Description
4-7
6481B–ATARM–27-Nov-09