Datasheet

OSC
Logic
Control and
registers
GND_SW1
GND_SW2
C
VDD
4.7 µF
VIN1
VIN2
BUCK1
BUCK2
LDO2
RESET
LDO2
GND_C
BIAS
Thermal
Shutdown
L
SW
1 2.2 µH
VINLDO1
1
24
6
VINLDO1
1319
5
8
23
4 9
18
AVDD
LDO1
LDO1
20
C
LDO
1
0.47 µF
VINLDO12
C
LDO
2
0.47 µF
LM26480 PMIC
15
SYNC
2
10
ENLDO1
17
ENLDO2
16
GND_L
VINLDO2
VINLDO12
ENSW1
ENSW2
12
7
1.8V
1.2V
3.3V
3.3V
VINLDO2
AVDD
AVDD
10 µF
10 µF
1 µF
1 µF
1 µF
1 µF
Power On
Reset
nPOR
VDD
FB1
FB2
3
C
SW
1
10 µF
R1
R2
C1
C2
SW1
FB1
VBUCK1
L
SW
2 2.2 µH
14
11
C
SW
2
10 µF
R1
R2
C1
C2
SW2
FB2
VBUCK2
R1
R2
R1
R2
21
22
FBL1
FBL2
100k
Power
ON-
OFF
Logic
Input
Voltage
LM26480
www.ti.com SNVS543I –JANUARY 2008–REVISED MAY 2013
Figure 1. Application Circuit
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