Only For Training And Service Purposes - LG GB220 Service Manual

3. TECHNICAL BRIEF
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.
LGE Internal Use Only
LGE Internal Use Only
Figure. 3.5.5 POWER SUPPLY BLOCK DIAGRAM
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Copyright © 2007 LG Electronics. Inc. All right reserved.

Only for training and service purposes

Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes