Power Management Unit; Only For Training And Service Purposes - LG KC780 Service Manual

3. TECHNICAL BRIEF
SU_ISENSE
VBAT_SU
VSS_SU
#Control Logic
LPBCL_ECHO
WDOG / SCAN_IN2
ON_OFF / SCAN_RESET
ON_OFF2 / SCAN_CLK
VSS_DIG
ON_OFF_OUT
RESET2_N / VSENSE2
PO_RESET_N / SCAN_OUT2
SLEEP_N / SCAN_ENABLE
SCANMODE
I2C_INT / SCAN_OUT1
I2C_CLK
I2C_DAT
#Audio Loudspeaker Amplifier
VBAT_MONO
VSS_MONO
MONO_OUTP
MONO_OUTN
MONO_INP
MONO_INN

3.4. Power Management Unit

3.4.1. General Description
S-GOLDradio integrates a Power Management Unit for Lithium-Ion battery driven applications that require
different power rails. The S-GOLDradio PMU provides two fully integrated, highly efficient, step-down
converters for the main loads such as cores and memories. Both step-down converters support low power
modes (PFM) for maximum efficiency at all times, the output voltages are stable under all load conditions.
For supply voltages higher than the battery voltage, the S-GOLDradio PMU provides a step-up converter.
This step-up converter provides the supply voltage to, for example, serial connected LED's used in display
backlight. A number of LDOs are available to provide different supply rails for different needs.
In addition, the S-GOLDradio PMU supports charging of the battery and generates the
power-on reset. It also provides stand-by voltages and supports different low power
modes. See Figure
LGE Internal Use Only
NA
NA
GND
NA
NONE
PWRON
NONE
NONE
NONE
NA
PO_RESET
NONE
NONE
NONE
NONE
NONE
NA
NA
NA
NA
NA
NA
4.
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Only for training and service purposes