3. TECHNICAL BRIEF
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3.2 Power Management
A mobile platform requires power supplies for different functions. These power supplies are generated in the
integrated power management Unit (PMU). The PMU is designed to deliver the power for a typical standard
phone.
Figure. 3-2-1 Block Figure of the PMU Modules X-Gold tm 110
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DC/DC Step Down Converter for 1.8V (SD1)
The DC/DC converter generates a 1.8 V supply rail. This voltage rail is used to supply main parts of the
system, like the digital core of the chip (via LDO LCORE), parts of the mixed signal macro, parts of the RF
macro and the external memory if a 1.8V memory is used.