Texas Instruments LM3248, User Manual, Page: 10 / 17

0306
1µF
C2
10µF
0402
C8
2.2µF
C11
DNI
1.6x2mm
1.5µH L3
3.2x1.0x2.5mm
1µH L1
PGND
PGND
GND
GND
PGND
4 amp m ax
PGND
S
W
_
B
O
O
S
T
B
3
V
D
D
2
_
B
U
C
K
F
2
FB_BUCK
E2
ACB
F4
P
V
IN
_
B
U
C
K
E
4
O
U
T
_
B
O
O
S
T
A
4
V
D
D
1
_
B
U
C
K
C
2
S
W
_
B
O
O
S
T
B
4
S
W
_
B
O
O
S
T
B
5
O
U
T
_
B
O
O
S
T
A
5
P
V
IN
_
B
U
C
K
E
5
ACB
F5
SW_BUCK
D4
SW_BUCK
D5
BOOST_GATE
B1
M ODE
C1
P
G
N
D
C
4
P
G
N
D
C
5
S
G
N
D
_
B
U
C
K
C
3
A
T
B
1
E
1
E
N
A
B
L
E
D
1
D
G
N
D
E
3
S
G
N
D
_
B
O
O
S
T
B
2
PVIN_BOOST
A2
PVIN_BOOST
A3
VDD_BOOST
A1
V
C
O
N
D
2
N/C
D3
A
T
B
2
F
1
P
G
N
D
F
3
U1
LM3248
VBATT
GND
GND_BUCK
BOOST_OUT GND_BST
GND
GND
GND
ATB0
ENABLE
ATB1
ATB2
ATB2
470µF
C6
4.7µF
0402
C10
GND
GND
SW_BUCK
FB_BUCK
VOUT
VBATT
SW_BOOST
BG
M ODE
ENABLE
ATB0
ATB1
GND
GND
0201
0.22µF
C14
PGND
GND
0603
0
R5
1
2 3 4 5
VOUT
0603
0
R1
100pF
0201
C3
1000pF
0201
C9
0402
10µF
C1
10µF
0402
C7
1 2
DNI
FB1
DNI
1000pF
0201
C34
GND
0201
0.01µF
C20
GND
GND
GND
GND GND
GND GND
GND
GND
GND
GND
GND
GND GND
GND
BG
MODE
499
0201
R6
499
0201
R7
499
0201
R3
01005
3300pF
C16
GND
1µF
0201
C18
01005
3300pF
C19
2.2µF
0402
C21
DNI
4.7µF
0402
C17
DNI
0
DNI
0402
R2
1
2
OUT_BST
1 2
LBST
1 2
ACB
1
2
VCON_S
1 2
L BUCK
470µF
C5
BUCK_OUT
1 2
BST_OUT
1
2
SW BST
1
2
PVIN BST
1
2
ATB0
1
2
SW BUCK
1
2
BK OUT
1
2
BG
1
2
M ODE
1
2
VCON
1
2
EN
1
2
ATB2
1
2
ATB1
(Default:
Cuttable
short circuit)
(De fa u l t: Cutta bl e s h ort c i rc ui t)
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15
17
19 16
18
20
P1
5103309-5
1 2
FB2
DNI
499
0201
R4
LM3248 Evaluation Module Schematic
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12 LM3248 Evaluation Module Schematic
10 LM3248 2.7MHz, 2.5A Boost-Buck DC/DC Converter Evaluation Module SNAA196 – September 2013
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