3. TECHNICAL BRIEF
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LGE Internal Use Only
Copyright © 011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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LGE Internal Use Only
Copyright © 011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure. 3.5.5 POWER SUPPLY BLOCK DIAGRAM
3.5.2.4 Power Supply
To increase power efficiency most parts of the RF subsystem are supplied by the DCDC converter situated in
the PMU subsystem. Conversion of the 1.8 V output voltage of the DCDC to the 1.3 V/1,4 V circuit supply
voltages is achieved by several Low-DropOut regulators (LDO).
One embedded direct-to-battery LDO provides the 2.5 V supply voltage for the remaining circuits.