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Rev.A Hardware Specifications 5-11
Developer's Guide SR-600
Confidential
Power Supply Unit
5-7 The power generated on the motherboard
The power that is provided from the power supply unit on the motherboard generates the
various power as shown above in the table 5-8. See “Power Supply Unit” on page 5-25 for more
details.
VCORE
This is a core power supply unit for CPU, and is generated by DC/DC converter from +5V.
According to the current Celeron ( up to 500MHz), VCORE is 2.00V. The jumper setting is not
necessary, since it is automatically set when attaching the CPU.
It starts its operation after PS - OK signal from the power supply unit is confirmed.
Output capacity range: 1.80V to 2.05V 0.05V step
Ouput voltage error: +/-2%
Electric current output: Approximately 14A (maximum)
ControlIC: Linear Technology LTC1753CG 20pin SSOP
VCC2.5
2.5V power supply for the CMOS signal of the CPU. It is generated by the series regulator from
+5V.
Electric current output: 500mA (maximum)
Regulator: Linear Technology LT1086CM
DC/DC
Converter
+5V
VCORE
+5VSB
Series
Regulator
+3.3VSB
+3.3V
Series
Regulator
VTT
Series
Regulator
VCC2.5