Personal Computer User Manual

Intel® PXA27x Processor Family Power Requirements
8 Application Note
2.1 Power Domains and System Voltage/Current Requirements
The following sections document the power requirements for the PXA27x processor, but do not
include external support, memory, or other peripheral components.
The power consumption values shown in Table 5 are all worst-case numbers. These numbers give
the worst-case system power-supply requirements and do not reflect typical system power
consumption.
2.1.1 Intel® PXA27x Processor Power Supplies
Viewed externally, the processor can require up to nine independent voltages provided by regulated
supplies. In some cases, multiple voltage domains might be strapped together, reducing the number
of separate regulators to as few as four. Internally, there are more domains, but these are powered
from the externally supplied domains by on-chip regulators. The internal domains are documented
for informational purposes only; the external power controller does not have to consider them in its
design.
Table 2 shows the PXA27x processor voltage domains.