Nokia 8208 Service Manual page 138

Power distribution
In normal operation, the baseband is powered by the mobile terminal's battery pack. The battery pack consists
of one lithium-ion cell with a capacity of 860 mAh and safety and protection circuits.
The PMIC controls the power distribution to the whole mobile terminal, which includes the baseband and the
RF regulators, but excludes the RF power amplifier (RF PA) RF power amplifier drains power from the battery
directly. The battery provides power directly to the following parts of the system:
PMic

RF PA

Flash LED driver IC

Power Key

Camera driver IC

Audio amplifier

The heart of the power distribution is the power control block inside the PMIC. It includes all the voltage
regulators and feeds the power to the entire system.
The baseband is powered by the following PM regulators:
Regulator Rating Current
MSMC 800 mA
MSMA 300 mA
MSMP 300 mA
RUIM 150 mA
TCXO 80 mA
Note: All output regulators voltage accuracy +/-2%
Below table includes the PM regulators for the RF.
Regulator Rating Current
Note: All output regulators voltage accuracy +/-2%
Page 5-22
Voltage Notes
1.27 V Always enabled except during power-off mode
Enabled only when the system is powered on (Off during
2.60 V
sleep and power-off modes)
2.60 V Always enabled except during power-off mode
3.0 V Enabled only when RUIM card is used
Enabled only when the system is powered on (Off during
2.85 V
sleep and power-off modes)
Table 30 Baseband Regulators
Voltage Notes
Table 31 RF Regulators
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System Module and User Interface
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