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Only for training and service purposes
LGE Internal Use Only
3. BB Circuit Technical brief
3.3 Power management IC
3.3.1 General Description
SM-POWER is a highly integrated Power and Battery Management IC for mobile handsets. It has
been specially designed for usage with S-Gold3. Although optimized for usage with the Infineon
SGOLD
baseband device it is suitable for the S-GOLD lite and the E-GOLD+ baseband devices as well.
It also supports the cellular RF devices like SMARTi-DC, SMARTi-DC+, SMARTi-SD and the
Bluemoon Single, Infineon’s single chip solution for Bluetooth. If used with S-GOLD3 it provides all
power supply functions (except for the RF PA) for a complete advanced GSM Edge smart phone
minimizing external device count.
Block Description
• Highly efficient step-down converter for main digital baseband supply including Core, DSP and
memory interface (External Bus Unit).
• Support of S-GOLD standby power-down concept
• Low-drop-out (LDO) regulators for Flash and mobile RAM memory devices
• Voltage independent switching of two SIM cards
• LDO regulators for baseband I/O supply
• LDO regulator for analog mixed-signal section of S-GOLD
• Low-noise LDO regulators for RF devices
• Supply for Bluemoon Single, Infineon’s single chip solution for Bluetooth
• Audio amplifier 8 Ohms for handsfree operation and ringing
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