IC Data Sheets
8.
8.5
Diagram
, TPS65251 (IC U19)
Figure 8-5 Internal block diagram and pin configuration
19421_
3
0
3
_1
3
0516.ep
s
1
3
0516
Block diagram
Pinning information
TP
S
65251
(power p
a
d connected to gro
u
nd)
3
MI
L
R
VIN
3
LX
3
LX
3
VIN
LX2
LX1
LX1
3
S
S
3
P
M
C
C
N
Y
S
1
2
3
4
5
6
11
12
1
3
14
15
16
17
1
8
19
20
7
8
9
10
1
P
M
C
C
S
O
R
1
B
F
LX2
VIN2
D
N
G
A
V
3
V
V
7
V
29
2
8
27
26
25
24
D
N
G
2
3
22
21
3
0
2
P
M
O
C
P
_
W
O
L
2
B
F
40
3
9
38
3
7
3
6
3
5
3
4
33
3
2
3
1
GND
VIN
VIN
D
O
O
G
P
B
S
T
3
EN
3
VIN1
B
S
T1
1
MI
L
R
2
S
S
2
MI
L
R
EN2
B
S
T2
1
S
S
EN1
3
B
F
GND
O
S
C
EN
3
12V DC
Su
pply
from en
ab
le logic
INTERNAL
VOLTAGE RAIL
S
V
3
V
V7V
Vo
u
t BUCK1
LX1
LX1
FB1
COMP1
B
S
T1
BUCK1
Vo
u
t BUCK2
LX2
LX2
FB2
COMP2
B
S
T2
BUCK2
Vo
u
t BUCK
3
LX
3
LX
3
FB
3
COMP
3
B
S
T
3
BUCK
3
EN2
from en
ab
le logic
EN1
from en
ab
le logic
SS
2
SS
1
SS3
VIN1
VIN2
VIN
3
Rlim1
RO
S
C
AGND
PG
Gener
a
tor
PGOOD
S
YNC
Rlim2
Rlim
3
PFM mode
LOW_P
VIN
GND
TPS65251