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Alpha & Omega Semiconductors

AOZ1092D Datasheet Preview

AOZ1092D Datasheet

3A Simple Buck Regulator

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AOZ1092D
EZBuck™ 3A Simple Buck Regulator
General Description
The AOZ1092D is a high efficiency, simple to use, 3A
buck regulator. The AOZ1092D works from a 4.5V to 16V
input voltage range, and provides up to 3A of
continuous output current with an output voltage
adjustable down to 0.8V.
The AOZ1092D comes in 4x5 DFN-8 packages and is
rated over a -40°C to +85°C ambient temperature range.
Features
4.5V to 16V operating input voltage range
50minternal PFET switch for high efficiency:
up to 95%
Schottky diode is included
Internal soft start
Output voltage adjustable to 0.8V
3A continuous output current
Fixed 500kHz PWM operation
Cycle-by-cycle current limit
Short-circuit protection
Output over voltage protection
Thermal shutdown
Small size 4x5 DFN-8 packages
Applications
Point of load DC/DC conversion
PCIe graphics cards
Set top boxes
DVD drives and HDD
LCD panels
Cable modems
Telecom/networking/datacom equipment
Typical Application
VIN
C1
22µF
Ceramic
VIN
EN U1 LX
AOZ1092D
COMP
FB
RC C5
AGND
GND
CC
L1
4.7µH
VOUT
3.3V
R1
C2, C3
22µF
Ceramic
R2
Rev. 1.3 February 2009
Figure 1. 3.3V/3A Non-Synchronous Buck Regulator
www.aosmd.com
Page 1 of 16




Alpha & Omega Semiconductors

AOZ1092D Datasheet Preview

AOZ1092D Datasheet

3A Simple Buck Regulator

No Preview Available !

AOZ1092D
Ordering Information
Part Number
Ambient Temperature Range
AOZ1092DI
-40°C to +85°C
Package
DFN-8 4x5
Environmental
RoHS
All AOS Products are offering in packaging with Pb-free plating and compliant to RoHS standards.
Please visit www.aosmd.com/web/quality/rohs_compliant.jsp for additional information.
Pin Configuration
VIN 1
PGND 2
AGND 3
FB 4
LX
GND
8 LX
7 LX
6 EN
5 COMP
4x5 DFN
(Top View)
Pin Description
Pin Number Pin Name
Pin Function
1 VIN Supply voltage input. When VIN rises above the UVLO threshold the device starts up.
2 PGND Power ground. Electrically needs to be connected to AGND.
3 AGND Reference connection for controller section. Also used as thermal connection for controller section.
Electrically needs to be connected to PGND.
4 FB The FB pin is used to determine the output voltage via a resistor divider between the output and
GND.
5 COMP External loop compensation pin.
6 EN The enable pin is active HIGH. Connect EN pin to VIN if not used. Do not leave the EN pin floating.
7, 8 LX PWM output connection to inductor. Thermal connection for output stage.
Rev. 1.3 February 2009
www.aosmd.com
Page 2 of 16


Part Number AOZ1092D
Description 3A Simple Buck Regulator
Maker Alpha & Omega Semiconductors
Total Page 16 Pages
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