LG KT520 Service Manual page 51

3. TECHNICAL BRIEF
3.2.4 Camera Regulator
APP_GP15_CAM_LDO_CTRL enables 1.8V & 2.8V Camera Regulator for both 3M and VGA Camera.
Charge Pump includes two voltage regulators.
(3M : 2.8V for analog, 1.8V for I/O, 1.8V for digital), (VGA : 2.8V for analog, 1.8V for I/O, digital)
APP_GP10_BL_CTRL
APP_GP15_CAM_LDO_CTRL
Figure 3-2-6. 1.8V and 2.8V Camera Regulator in Charge Pump
1.5V LDO is used for only 2M digital core. It's derived from AB3000 and controlled by camera driver
file.
C601 C602 C603
1u 1u 2.2u
C12
VDD_A
B11
EXTLDO
F12
VDD_D
D12
VDD_E
A11
VDD_C
B12
VDD_H
A9
VDD_F
A7
VDD_G
M12
VDD_K
J11
VDDLP
C606 C607 C608 C609
1u 1u 1u 1u
B2
VBUCK
A2
VDDBUCK
A1
SWBUCK
LGE Internal Use Only
VBAT
C101
10u
ESD9X5.0ST5G
INSTPAR
ZD101
C103
0.01u
BACKLIGHT CHARGE PUMP
R639 0
0
R603
R636 0
R637 0
R605 4.7K
C610 C611
1u 1u
VBAT_C VBAT
1608 120ohm(@100MHz)
FB600
BLM18PG121SN1J
3*3*1.2 0.85A 155mohm 30%
Figure 3-2-7. 1.5V Camera LDO in AB3000
- 52 -
U100 MAX8631XETI
1 23
PIN C1P
2
IN C100
1u
22
C1N
3 26
GND C2P
24
PGND C102
29
BGND 1u
27
C2N
25
OUT
20
ENM1
19
ENM2
21 16
ENF M1
18 15
ENLDO M2
28 14
P1 M3
17 13
P2 M4
12
F1
11
F2
8 10
SETM F3
9
F4
7
SETF
4
LDO1
6 5
REFBP LDO2
C104 C105
1u 1u
VDDC_2V65
VDDH_CAM_CORE
VDDF_2V5
VDDG_2V75
VDDK_2V75
Parallel with VCORE
L600 4.7uH
Copyright © 2008 LG Electronics. Inc. All right reserved.
VDD_BACKLIGHT
LCD_BL1
LCD_BL3
LCD_BL5
LCD_BL2
LCD_BL4
VDD_CAM_2V8
VDD_CAM_1V8
C106
10u
VDDD_1V5 to AB3000 CODECs/ADC/PLL
VDDE_1V8 to All I/O Supplies and Memory
VDIGRAD_1V8 to RF3000 and RF3100 digital
VDDC_2V65 to Hall Switch, AB3000 BEAR
SS 1.2V
VDDH_CAM_CORE
VDDF_2V5 to DB3100 analog
to SD Card and LCD and OJ
VDDG_2V75
VDDK_2V75 to Bluetooth
VBACKUP to AB3000 RTC module
VCORE
VBUCK_FB
VCORE to DB3100 CORE
Only for training and service purposes