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AOZ1081AI Datasheet(PDF) 1 Page - Alpha & Omega Semiconductors

Part # AOZ1081AI
Description  EZBuck??1.8A High Efficiency
PDF  16 Pages
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Manufacturer  AOSMD [Alpha & Omega Semiconductors]
Direct Link  http://www.aosmd.com
Logo AOSMD - Alpha & Omega Semiconductors

AOZ1081AI Datasheet(HTML) 1 Page - Alpha & Omega Semiconductors

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Rev. 1.1 April 2009
www.aosmd.com
Page 1 of 16
AOZ1081
EZBuck™ 1.8A High Efficiency
Constant Current Regulator for LEDs
General Description
The AOZ1081 is a high efficiency, simple to use, 1.8A
buck regulator for White LED. The AOZ1081 works from
a 4.5V to 16V input voltage range, and provides up to
1.8A of continuous output current with an output voltage
adjustable down to 0.25V.
The AOZ1081 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
● 100 mΩ internal PFET switch for high efficiency:
up to 95%
● Internal Schottky Diode
● Internal soft start
● 0.25V internal reference with ±5% accuracy over
temperature
● 1.8A continuous output current
● Fixed 1MHz 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
● Buck regulator for white LEDs
● Landscape lighting
● Flashlights
● Battery powered backlight applications
Typical Application
Figure 1.
LX
VIN
VOUT
FB
PGND
EN
COMP
AGND
C1
22µF
C3
22µF
RFB
HB
LED
R1
C2
4.7µH
VIN
AOZ1081


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