AOZ1031AI Datasheet, PDF (1/15 Pages) Alpha & Omega Semiconductors – EZBuck™ 3A Synchronous Buck Regulator

AOZ1031AI
EZBuck™ 3A Synchronous Buck Regulator
General Description
The AOZ1031A is a high efficiency, easy to use, 3A
synchronous buck regulator. The AOZ1031A works from
4.5V to 18V input voltage range, and provides up to 3A of
continuous output current with an output voltage adjust-
able down to 0.8V.
The AOZ1031A comes in a SO-8 package and is rated
over a -40°C to +85°C operating ambient temperature
range.
Features
z 4.5V to 18V operating input voltage range
z Synchronous Buck: 80mΩ internal high-side switch
and 30mΩ internal low-side switch with integrated
schottky diode
z High efficiency: up to 95%
z Internal soft start
z Output voltage adjustable to 0.8V
z 3A continuous output current
z Fixed 600kHz PWM operation
z Pulse skipping at light load for high efficiency over
entire load range
z Cycle-by-cycle current limit
z Pre-bias start-up
z Short-circuit protection
z Thermal shutdown
z SO-8 package
Applications
z Point of load DC/DC converters
z LCD TV
z Set top boxes
z DVD/Blu-ray players/recorders
z Cable modems
z PCIe graphics cards
z Telecom/Networking/Datacom equipment
Typical Application
VIN
C1
22µF
R_C
C_C
VIN
EN
AOZ1031 ^LX
COMP
FB
AGND
PGND
L1 4.7µH
R1
R2
VOUT
C2, C3
22µF
Rev. 1.6 March 2010
Figure 1. 3.3V 3A Synchronous Buck Regulator
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