purpose of dc-dc converter in nokia new models?

[zone3]

purpose of dc-dc converter in nokia new models?

in x6 ic n2201 output 1.8v-this output for which ic?

help me

thank u

[neilthirumuttam]

JUST POST DETAILS OF THE present problem you face in this phone
wiki says like this

DC to DC converters are important in portable electronic devices such as cellular phones and laptop computers, which are supplied with power from batteries primarily. Such electronic devices often contain several sub-circuits, each with its own voltage level requirement different from that supplied by the battery or an external supply (sometimes higher or lower than the supply voltage). Additionally, the battery voltage declines as its stored power is drained. Switched DC to DC converters offer a method to increase voltage from a partially lowered battery voltage thereby saving space instead of using multiple batteries to accomplish the same thing.

Most DC to DC converters also regulate the output. Some exceptions include high-efficiency LED power sources, which are a kind of DC to DC converter that regulates the current through the LEDs, and simple charge pumps which double or triple the input voltage.

smps you seen nokia phones ?
what they do ?
generates core voltage from batter for driving system ic in N 70 right ?
schematic will answer yourself .

good luck
regards,
NEIL