aoz1232-01 Alpha & Omega Semiconductor, aoz1232-01 Datasheet - Page 13

• Manufacturer Part Number: aoz1232-01
• Description: 28v/6a Synchronous Ezbucktm Regulator
• Manufacturer: Alpha & Omega Semiconductor

Several layout tips are listed below for the best electric
and thermal performance.
1. The LX pins and pad are connected to internal low
2. The IN pins and pad are connected to internal high
3. Do not use thermal relief connection on the PGND
4. Input capacitors should be connected to the IN pin
5. Decoupling capacitor C
Rev. 1.0 October 2011
side switch drain. They are low resistance thermal
conduction path and most noisy switching node.
Connect a large copper plane to LX pin to help ther-
mal dissipation.
side switch drain. They are also low resistance ther-
mal conduction path. Connect a large copper plane
to IN pins to help thermal dissipation.
pin. Pour a maximized copper area on the PGND pin
to help thermal dissipation.
and the PGND pin as close as possible to reduce the
switching spikes.
VCC and AGND as close as possible.
C in
C o u t
VCC
should be connected to
PGND 12
PGND 12
PGND 13
PGND 13
PGND 14
PGND 14
Rton
IN
IN
IN
IN
IN
IN
IN
IN
V o
Vo
10
10
11
11
8
8
9
9
R 2
V o
www.aosmd.com
R1
6. Voltage divider R1 and R2 should be placed as close
7. R
8. A ground plane is preferred; Pin 26 (PGND) is con-
9. Keep sensitive signal traces such as feedback trace
10. Pour copper plane on all unused board area and
as possible to FB and AGND.
Pin 6 (TON pin).
nected to the ground plane through via.
far away from the LX pins.
connect it to stable DC nodes, like VIN, GND or
VOUT.
TON
30
29
29
28
27
26
25
25
24
24
23
23
should be connected as close as possible to
AGND
AGND D
LX
LX
LX
LX
LX
LX
SS
VCC
BST
PGND
L X
Cvc c
G N D
C b
Vc c
AOZ1232-01
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