IC Data Sheets
8.
8.4
Diagram
B12, G5312QN1U (IC U703)
Figure 8-4 Internal block diagram and pin configuration
19980_303.eps
Block diagram
Pinning information
1
AGND
LX
V+
2
3
4
5
6
7
8
9
10
11
12
1
3
14
15
16
17
18
19
20
21
22
2
3
24
25
26
27
2
8
ILIM
AGND
V5V
PGND
LX
LX
LX
LX
PG
ND
PGN
D
LX
LX
PGN
D
PGN
D
PGN
D
PGN
D
V+
V+
V+
V+
OUT
TON
FB
VCC
EN
B
S
T
PGOOD
NC
1
AGND
LX
V+
2
3
4
5
6
7
8
9
10
11
12
1
3
14
15
16
17
18
19
20
21
22
2
3
24
25
26
27
2
8
ILIM
AGND
V5V
PGND
LX
LX
LX
LX
PG
ND
PGN
D
LX
LX
PGN
D
PGN
D
PGN
D
PGN
D
V+
V+
V+
V+
OUT
TON
FB
VCC
EN
B
S
T
PGOOD
NC
G5312QN1U
G5312QN1U
PWM
controller
0.75V
Reference
PGOOD
BST
LX
PGND
TON
OUT
FB
EN
ILIM
AGND
OCP
POR
On-Time
Off-Time
DISCHG
VCC
OT
OVP
UVP
KV+
5V
LDO
V5V
V+
V5V
V+
DH
DL
Q1
Q2
PWM
controller
0.75V
Reference
PGOOD
BST
LX
PGND
TON
OUT
FB
EN
ILIM
AGND
OCP
POR
On-Time
Off-Time
DISCHG
VCC
OT
OVP
UVP
KV+
5V
LDO
V5V
V+
V5V
V+
DH
DL
Q1
Q2