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Alpha & Omega Semiconductors
Alpha & Omega Semiconductors

AOZ1053PI Datasheet Preview

AOZ1053PI Datasheet

5A Synchronous Buck Regulator

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AOZ1053PI pdf
AOZ1053PI
EZBuck™ 5A Synchronous Buck Regulator
General Description
The AOZ1053PI is a high efficiency, easy to use, 5A
synchronous buck regulator. The AOZ1053PI works from
4.5V to 18V input voltage range, and provides up to 5A of
continuous output current with an output voltage
adjustable down to 0.8V.
The AOZ1053PI comes in an exposed pad SO-8
package and is rated over a -40°C to +85°C operating
ambient temperature range.
Features
4.5V to 18V operating input voltage range
Synchronous Buck: 55minternal high-side switch
and 19minternal low-side switch (at 12V)
Up to 95% efficiency
External soft start
Output voltage adjustable to 0.8V
5A continuous output current
450kHz PWM operation
Cycle-by-cycle current limit
Pre-bias start-up
Short-circuit protection
Thermal shutdown
Exposed pad SO-8 package
Applications
Point of load DC/DC converters
LCD TV
Set top boxes
DVD and Blu-ray players/recorders
Cable modems
Typical Application
VIN
C1
10µF
RC
CC
CSS
VIN SS
EN
AOZ1053PI LX
COMP
FB
AGND
PGND
L1 4.7µH
R1
R2
VOUT
C2, C3
22µF
Rev. 0.4 September 2012
Figure 1. 3.3V, 5A Synchronous Buck Regulator, Fs = 450kHz
www.aosmd.com
Page 1 of 14
Free Datasheet http://www.datasheet4u.com/



Alpha & Omega Semiconductors
Alpha & Omega Semiconductors

AOZ1053PI Datasheet Preview

AOZ1053PI Datasheet

5A Synchronous Buck Regulator

No Preview Available !

AOZ1053PI pdf
Ordering Information
Part Number
AOZ1053PI
Ambient Temperature Range
-40 °C to +85 °C
Package
EPAD SO-8
AOS Green Products use reduced levels of Halogens, and are also RoHS compliant.
Please visit www.aosmd.com/media/AOSGreenPolicy.pdf for additional information.
Pin Configuration
PGND 1
VIN 2
AGND 3
FB 4
PAD
(LX)
8 NC
7 SS
6 EN
5 COMP
Exposed Pad SO-8
(Top View)
AOZ1053PI
Environmental
Green Product
Pin Description
Pin Number
1
2
Pin Name
PGND
VIN
3 AGND
4 FB
5 COMP
6 EN
7 SS
8 NC
Exposed pad
LX
Pin Function
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. 5µA 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.
Rev. 0.4 September 2012
www.aosmd.com
Page 2 of 14
Free Datasheet http://www.datasheet4u.com/


Part Number AOZ1053PI
Description 5A Synchronous Buck Regulator
Maker Alpha & Omega Semiconductors
Total Page 14 Pages
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