10.
Circuit Diagrams and PWB Layouts
DC-DC BUCK & LDO Regulator
19170_514_110627.eps
110627
DC-DC BUCK & LDO Regulator
B02
B02
2011-03-12
4
715G4611
DC-DC BUCK &
LDO Regulator
OPWRSB
OPWRSB
LVDS_PWR_EN
LVDS_PWR_EN
5V_BUCK
+12V
AVDD3V3
DVDD3V3
3V3_BUCK
3V3_BUCK
5VSB
5V_SW
DDRV
5V_USB
3V3SB
5VSB
5VESD
ADAC_PWR
5V_SW
3V3SB
5VSB
V3.3
V1.2
V3.3
5V_SW
AVDD3V3
5V_SW
AVDD1V2
+12V
5VSB
5V_BUCK
LVDSVDD
VCCK
5VSB
5V_SW
3V3_BUCK
5V_SW
VCCK
+24V_USB
OPWRSB
12
GND
4,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22
LVDS_PWR_EN
12
SoC_AVDD3V3 = 740 mA
HDMI_SW = 120 mA
15K
5V2
12V5
82K
220K
R736
15K
R737
V1 = 0.8 * (1+ 220/15) = 12.5
V2 = 0.8 * (1+ 82/15) = 5.17
= 0.925*(1+2.43/10) = 1.15
Vo = 0.925*(1+R743/R742)
SoC_1V2 = 2250mA
Soc Core Power : 1.15V (3A)
R743 = 2.7K --> 2.43K
12V5 or 5V2 Main Power (3A)
3V3 Main Power :
1V8 or 1V5 DDR Power : DDRV
Vo = 1+ (R732/R733)
DDR2 = 650mA
V1 = 1+ (8.2/10) = 1.82
V2 = 1+ (5.2/10) = 1.52
R732 = 2.7K --> 8.2K
R732 = 2.7K --> 5.2K
USB2.0 = 1000mA
R736 = 220K
R736 = 82K
DDR3 = 900mA
Vo = 0.8 * (1+ R736/R737)
Demod_1V2 = 210mA
Vout=Fixed 1.2V
G903T63UF
G912T63U
Demod 3V3 Power : V3.3
Demod_3V3 = 85mA.
Vout=Fixed 3.3V
NC/G903T63UF
Reserved for ADAC_PWR
Vout=Fixed 3.3V
Analog Power : AVDD1V2
SoC_AVDD1V2 = 400 mA
Demod 1V2 Power : V1.2
SoC_3V3_STBC = 30 mA;
SoC_X'TAL = 80 mA;
G903T63UF
STBY Power : 3V3SB
Total = 110 mA.
Vout=Fixed 3.3V
Vo = 1+ (R749/R748)
V1 = 1+ (2/10) = 1.2
System Power Control
NC
1V2: ON
0V: STANDBY
NC
NC
NC
YES
YES
5V panel
12V panel
FB713
FB712
FB711
L: Off
Panel Logic Power Control
LDO Regulator
Power MOSFET Switch
Vout=0.827x (1+100.3K/33K) = 3.34V for DVDD3V3 & AVDD3V3
R727
10K 1/10W
R766
33K 1%
Q704
PMBS3904
1
2
FB728
120R/3000mA
C710
100N 50V
C753
10U 16V
C724
10U 16V
C750
1UF 10V
1
2
FB732
NC\120R/3000mA
C746
NC\10N 50V
C721
22uF 10V
C762
1UF16V
L702
2.2uH
L702
2.2uH
C760
NC\10U 16V
C757
NC\10U 16V
C732
180pF 50V
C739
1UF 10V
C728
10uF 16V
S
1
S
2
S
3
G
4
D
8
D
7
D
6
D
5
Q709
AO4449 -7A/-30V
C709
NC\470nF 16V
R731
1K 1/16W 5%
C748
10U 16V
C742
10uF 16V
1
2
FB735
NC\120R/3000mA
R734
47K 1/16W 5%
C731
1uF 50V
1
2
FB716
120R/3000mA
1
2
FB725
120R/3000mA
C734
1uF 25V
1
2
FB711
NC\120R/6000mA
1
2
FB712
NC/120R/6000mA
C758
NC\10U 16V
VI
3
VO
2
GND
1
4
4
U708
U708
R728
C745
2.2nF 50V
R737
15K 1%
R743
2.7K 1/16W 1%
C7003
22UF
1
2
FB729
120R/3000mA
S
1
S
2
S
3
G
4
D
8
D
7
D
6
D
5
Q707
AO4449 -7A/-30V
C737
10U 16V
C761
NC\10U 16V
C763
NC\10U 16V
L701
1.5UH
R715
10K 1/16W 5%
C715
NC\220NF 25V
1
2
FB717
120R/3000mA
FB717
1
2
FB727
120R/3000mA
R725
56KOHM 1/16W
LX
1
BST
2
GND
3
FB
4
COMP
5
EN
6
VIN
7
VBIAS
8
U703
AOZ1212AI
VIN
1
VIN
2
GND
3
GND
4
AGND
5
VSNS
6
COMP
7
RT/CLK
8
SS
9
PH
10
PH
11
PH
12
BOOT
13
PWRGD
14
EN
15
VIN
16
PwPd
17
U701
TPS54319RTE
U701
TPS54319RTE
1
2
FB746
120R/3000mA
C765
10U 16V
L703
10uH
C733
1N 50V
C718
100N 16V
R767
100K 1%
R740
4K7 1/16W 5%
R749
2K 1%
VIN
3
VOUT
2
GND
1
4
4
U709
U709
1
2
FB707
NC\120R/6000mA
LX
3
FB
5
SS
8
IN
2
EN
7
COMP
6
NC
1
GND
4
Th
e
rm
a
l P
a
d
9
U704
G5657F12U
R747
1K 1/16W 5%
C741
10uF 16V
C799
0.1UF 16V
R730
300R 1/16W 1%
C755
10nF50V
+
C729
100UF 25V
+
1
2
FB734
NC\120R/3000mA
1
2
FB723
120R/3000mA
1
2
FB713
120R/6000mA
C754
10nF50V
R735
20K 1/16W
R745
1K 1/16W 5%
C759
NC\1UF 10V
C736
10uF 16V
R772
100K 1/16W 5%
1
2
D702
SX34
C719
NC/22uF 10V
1
2
FB737
120R/3000mA
R729
1
8
0K
1
%
R713
1K 1/16W 5%
R713
1K 1/16W 5%
C727
10U 16V
1
2
FB715
120R/6000mA
C725
10nF50V
C756
NC\1UF 10V
1
2
FB733
NC\120R/3000mA
1
2
D704
SX34
R717
10K 1/16W 5%
L704
47uH
C751
10U 16V
TP708
TP708
R723
10K 1/16W 5%
1
2
FB719
120R/3000mA
C726
10nF50V
C747
100N 16V
56KOHM 1/16W
R726
56KOHM 1/16W
1
2
D703
NC\RB160M-60TE25
R732
8.2K 1%
C767
NC\10U 16V
Q706
PMBS3904
VOUT
4
VIN
1
EN
3
LX
5
GND
2
U702
SC189ASKTRT
R741
-5% 1/16W
R768
NC\0.68 OHM +-5% 2WS
C723
1UF 10V
C735
100N 50V
C714
220NF 25V
R742
10K +-1% 1/16W
VIN
3
VOUT
2
GND
1
4
4
U705
U705
1
2
FB714
NC/120R/6000mA
FB714
1
2
FB726
120R/6000mA
1
2
FB731
NC\120R/3000mA
C764
NC\1UF 10V
C738
0.1UF 16V
C716
100N 50V
C722
1UF 10V
C749
10U 16V
1
2
FB736
NC\120R/3000mA
C766
10U 16V
C720
22uF 10V
1
2
FB721
120R/3000mA
R716
22K 1/16W 5%
C730
1uF 50V
1
2
FB718
120R/3000mA
1K 1/16W 5%
R724
C743
100N 16V
R733
10K +-1% 1/16W
C7002
NC\100N 16V
R748
10K +-1% 1/16W
VIN
3
VOUT
2
GND
1
4
4
U707
U707
C744
180pF 50V
C752
10U 16V
C7001
100N 16V
1
2
FB730
120R/3000mA
R714
10K 1/16W 5%
R714
10K 1/16W 5%
L705
2.2uH
R753
10K +-1% 1/16W
R736
82K 1/16W
C717
10uF 10V
C713
3.3nF 50V
VOUT
4
VIN
1
EN
3
LX
5
GND
2
U706
SC189ASKTRT