Nokia c2-00 Service Manual page 147

RM-704
System Module
The above figure shows the VPMU, VMMC, VSIM, VRTC, VUSB and VAUX LDO outputs of X-Gold213 together with
the output decoupling capacitors. VANA is implemented with a cap-less LDO, hence this supply is not available
on any X-Gold213 balls. Main part of the system is powered from a 1.8V supply rail. This voltage is generated
by the integrated step down converter (SD1) which needs only an inductor L2204 plus input and output
decoupling capacitors C2207 and C2206.
Figure 55 Power supply distribution
The above figure shows the power supply distribution of Quantum for the supplies which are used outside
the X-Gold213. Regulators in the X-GOLD213 convert the battery voltage VBAT to regulated supplies for the
various peripherals. The SD-card features dedicated regulator. A shared supply concept is used for other
peripherals. This means in general that there is no power on/off control implemented for the shared supplies,
these regulators will be enabled always when the system is on.
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