GX500 Operational Description Revision A
LG Electronics 38/143 LGE Property
3.3 Power management IC
GX500 is composed of dual Power Management Part. (S-Gold3 & S-Gold Radio)
3.3.1 S-Gold3 Part
3.3.1.1 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 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-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
• 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
• Two single LED driver outputs for signaling
• Vibrator driver with adjustable voltage
• Fully controlable by software via I2C – Bus
• Temperature and battery voltage sensors
• Interrupt channels for peripherals
• System debug mode
• VQFN 48 package with heat sink and non-protruding leads
• Compatible with the Infineon E-GOLD+ V2 and V3
SM-POWER is a further step on the successful E-Power product line with enhanced and optimized
functionality.
SM-POWER features a baseband supply concept with a DC/DC step-down converter cascaded by two linear
regulators
–SM-POWER’s DC/DC converter makes up to 40 % reduction of battery current for smart phone functions (e.g.
organizer functions, games, MP3 decoding) possible.
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