Datasheet

LTC3521
18
3521fb
For more information www.linear.com/LTC3521
applicaTions inForMaTion
Figure 5. LTC3521 Recommended PCB Layout
PGND2
(18)
SW3
(17)
V
OUT1
(16)
SW1A
(15)
SW1B
(14)
NC
(13)
SHDN2
(1)
PGOOD3
(2)
PGOOD2
(3)
PGOOD1
(4)
V
IN
(5)
GND
(6)
BUCK
V
OUT
BUCK
V
OUT
VIA TO
GROUND PLANE
3521 F05
KELVIN TO
V
OUT
PAD
KELVIN TO
V
OUT
PAD
BUCK-BOOST
V
OUT
KELVIN TO
V
OUT
PAD
MINIMIZE
TRACE
LENGTH
MINIMIZE
TRACE
LENGTH
MINIMIZE
TRACE
LENGTH
DIRECT TIE
BACK TO
GND PIN
UNINTERRUPTED GROUND PLANE MUST EXIST UNDER ALL COMPONENTS
SHOWN IN BOLD, AND UNDER TRACES CONNECTING TO THOSE COMPONENTS
FB2
(24)
FB3
(23)
PV
IN2
(22)
PGND1A
(9)
SW2
(20)
NC
(19)
PWM
(7)
FB1
(8)
SHDN3
(9)
SHDN1
(10)
PV
IN
(11)
PGND1B
(12)