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3. TECHNICAL BRIEF
ͽͶ͑ͺΟΥΖΣΟΒΝ͑ΆΤΖ͑ΟΝΪ
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Figure. 3.5.5 POWER SUPPLY BLOCK DIAGRAM
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.