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AOZ1057AI Datasheet(PDF) 1 Page - Alpha & Omega Semiconductors

Part # AOZ1057AI
Description  EZBuck??3A Simple Buck Regulator
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Manufacturer  AOSMD [Alpha & Omega Semiconductors]
Direct Link  http://www.aosmd.com
Logo AOSMD - Alpha & Omega Semiconductors

AOZ1057AI Datasheet(HTML) 1 Page - Alpha & Omega Semiconductors

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Rev. 1.3 November 2009
www.aosmd.com
Page 1 of 15
AOZ1057
EZBuck™ 3A Simple Buck Regulator
General Description
The AOZ1057 is a high efficiency, simple to use, 3A buck
regulator. The AOZ1057 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 AOZ1057 comes in an SO-8 package and is rated
over a -40°C to +85°C ambient temperature range.
Features
● 4.5V to 16V operating input voltage range
● 40mΩ internal PFET switch for high efficiency:
up to 95%
● Externally soft start
● Output voltage adjustable to 0.8V
● 3A continuous output current
● Fixed 340kHz PWM operation
● Cycle-by-cycle current limit
● Short-circuit protection
● 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
Figure 1. 3.3V/3A Buck Regulator
LX
VIN
Css
82nF
SS
VOUT
3.3V
FB
PGND
EN
U1
COMP
AGND
C1
22µF Ceramic
C2, C3
22µF Ceramic
C5
R1
R2
D1
RC
CC
L1
6.8µH
VIN
AOZ1057


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