Voltage Regulation - LG AT&T GR500 Service Manual

3. TECHNICAL BRIEF

3.6. Voltage Regulation

The LDO regulators and the BUCK converter generate a range of programmable voltages, each optimized
for its load. When the analog baseband controller boots up or down, internal signals activate or
deactivate the LDO regulators and the BUCK converter. In active mode, the LDO regulators and the BUCK
converter are activated and deactivated through I2C. The low power regulator is on all the time and has
extremely low power consumption with limited output current. It provides power for the 32 kHz oscillator
and the real-time clock (RTC).
LGE Internal Use Only
Table. 3-6-1. LDO and Buck
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