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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 213
▪ DC/DC Step Down Converter for 1.8V (SD1)
The DC/DC converter generates a 1.8V supply rail. This voltage rail is used to supply main parts of the
system, like the digital core of the chip (via LDO LCORE), some parts of the mixed signal macro, parts of
the RF macro and the external memory if a 1.8V memory is used. The efficiency of the DC/DC converter is
optimized for an average load current of 100mA. That is the load current estimated for the GSM talk
mode.
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
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