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Alpha & Omega Semiconductors

AOZ1046 Datasheet Preview

AOZ1046 Datasheet

2A Simple Buck Regulator

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AOZ1046
EZBuck™ 2A Simple Buck Regulator
General Description
The AOZ1046 is a high efficiency, simple to use, 2A buck
regulator. The AOZ1046 works from a 4.75V to 16V input
voltage range, and provides up to 2A of continuous
output current with an output voltage adjustable down
to 0.8V.
The AOZ1046 comes in an SO-8 package and is rated
over a -40°C to +85°C ambient temperature range.
Features
4.75V to 16V operating input voltage range
130minternal PFET switch for high efficiency:
up to 95%
Internal Schottky diode
Internal soft start
Output voltage adjustable to 0.8V
2A continuous output current
Fixed 500kHz PWM operation
Cycle-by-cycle current limit
Short-circuit protection
Under voltage lockout
Output over voltage protection
Thermal shutdown
Small size SO-8 package
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
From μPC
20kΩ
VIN
EN
AOZ1046
COMP
LX
FB
C5
1nF
C2
AGND PGND
L1
4.7μH
VOUT
R2
C4, C6
22μF Ceramic
R3
Rev. 1.0 December 2008
Figure 1. 3.3V/2A Buck Regulator
www.aosmd.com
Page 1 of 15




Alpha & Omega Semiconductors

AOZ1046 Datasheet Preview

AOZ1046 Datasheet

2A Simple Buck Regulator

No Preview Available !

AOZ1046
Ordering Information
Part Number
Ambient Temperature Range
AOZ1046AI
-40°C to +85°C
Package
SO-8
Environmental
RoHS
All AOS products are offered in packages with Pb-free plating and compliant to RoHS standards.
Parts marked as Green Products (with “L” suffix) use reduced levels of Halogens, and are also RoHS compliant.
Please visit www.aosmd.com/web/quality/rohs_compliant.jsp for additional information.
Pin Configuration
PGND 1
VIN 2
AGND 3
FB 4
SO-8
(Top View)
8 LX
7 LX
6 EN
5 COMP
Pin Description
Pin Number Pin Name
1 PGND
2 VIN
3 AGND
4 FB
5 COMP
6 EN
7, 8 LX
Pin Function
Power ground. Electrically needs to be connected to AGND.
Supply voltage input. When VIN rises above the UVLO threshold the device starts up.
Reference connection for controller section. Also used as thermal connection for controller
section. Electrically needs to be connected to PGND.
The FB pin is used to determine the output voltage via a resistor divider between the output
and GND.
External loop compensation pin.
The enable pin is active HIGH. Connect EN pin to VIN if not used. Do not leave the EN pin
floating.
PWM output connection to inductor. Thermal connection for output stage.
Rev. 1.0 December 2008
www.aosmd.com
Page 2 of 15


Part Number AOZ1046
Description 2A Simple Buck Regulator
Maker Alpha & Omega Semiconductors
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AOZ1046 Datasheet PDF






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