Power Management Ic - LG Prada KE850 Service Manual

F32K
OSC32K
RESET_n
CC1CC1IO
RTC_OUT
VCXO_EN
CLKOUT0
GPIO_62
GPIO_63

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-Gold2. Although optimized for usage with the Infineon S-
GOLD baseband device it is suitable for the S-GOLDlite 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-GOLD2 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
• Charge Control for charging Li-Ion/Polymer batteries under software control
• Pre-charge current generator with selectable current level
• RTC regulator with ultra-low quiescent current
• USB interface support for peripheral and mini-host mode
• Backlight LEDs driver with current selection and PWM dimming function
RESETn
TRIG_OUT
RTC_OUT
XO_ENE
26M_DAC
BT_RST
SIM_EN_n
- 31 -
3. TECHNICAL BRIEF
to 32k crystal
to 32k crystal
For JTAG & ETM Interface
For Audio AMP
For Bluetooth