aoz1051pi Alpha & Omega Semiconductor, aoz1051pi Datasheet - Page 2

• Manufacturer Part Number: aoz1051pi
• Description: Ezbucktm 3 A Synchronous Buck Regulator
• Manufacturer: Alpha & Omega Semiconductor

Ordering Information
Pin Configuration
Pin Description
Rev. 1.0 June 2011
Pin Number
Part Number
Exposed pad
AOZ1051PI
AOS Green Products use reduced levels of Halogens, and are also RoHS compliant.
Please visit
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www.aosmd.com/web/quality/rohs_compliant.jsp
Pin Name
Ambient Temperature Range
COMP
PGND
AGND
VIN
NC
FB
EN
SS
LX
-40 °C to +85 °C
Power ground. PGND needs to be electrically connected to AGND.
Supply voltage input. When VIN rises above the UVLO threshold and EN is logic high,
the device starts up.
Analog ground. AGND is the reference point for controller section. AGND needs to be
electrically connected to PGND.
Feedback input. The FB pin is used to set the output voltage via a resistive voltage divider
between the output and AGND.
External loop compensation pin. Connect a RC network between COMP and AGND to
compensate the control loop.
Enable pin. Pull EN to logic high to enable the device. Pull EN to logic low to disable the
device. If on/off control in not needed, connect EN to VIN and do not leave it open.
Soft-start pin. 5 µA current charging current.
No Connect Pin. Pin 8 is not internally connected. Connect this pin externally to LX and
use it for better thermal performance.
Switching node. LX is the drain of the internal PFET. LX is used as the thermal pad of the
power stage.
PGND
AGND
VIN
FB
Exposed Pad SO-8
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www.aosmd.com
(Top View)
(LX)
PAD
for additional information.
EPAD SO-8
Package
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NC
SS
EN
COMP
Pin Function
Environmental
Green Product
AOZ1051PI
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