LG GD580 - Voltage Regulation

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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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).
LDO
NtN
Ot t
Vlt
Ot t
Ct
U
LDO
N
e
tN
ame
O
u
t
pu
t
V
o
lt
age
O
u
t
pu
t
C
urren
t
U
sage
ABB_LDO A(VBAT_A) VRADA_2V8 2.75V 150mA
RF3000, RF3100 Analog
WCDMA Power Detector
ABB_LDO C(VBAT_E) VDDC_2V65 2.75V 200mA AB3000 BEAR, PCB Version
ABB_LDO D(VBAT_B) VDDD_1V5 1.5V 200mA AB3000 CODECs/ADC/PLL
VDDE 1V8
All
I/O Supplies Memory
ABB_LDO E(VBAT_B)
VDDE
_
1V8
VDIGRAD_1V8
1.8V 200mA
All
I/O Supplies
,
Memory
RF3000, RF3100 Digital
ABB_LDO F(VBAT_F) VDDF_2V5 2.5V 30mA DB3150 Analog
ABB_LDO G(VBAT_F) VDDG_2V85 2.85V 100mA SD Card
ABB_LDO H(VBAT_E) VDDH_2V75 2.75V 100mA 3AXIS Sensor
ABB_LDO K(VBAT_G) VDDK_2V75 2.75V 200mA Bluetooth
ABB LDO
LP(VBAT G)
VBACKUP
1.5V
6.5mA
Backup Battery
Table 3-6-1. LDO and Buck
ABB
_
LDO
LP(VBAT
_
G)
VBACKUP
1.5V
6.5mA
Backup Battery
ABB_BUCK(VBAT_C) VCORE 1.2V 600mA DB3150 Core
ABB_SI
M LDO(VBAT_D) SIMVCC 2.85V 50mA SIM Card