AOZ1021 Datasheet, PDF (1/15 Pages) Alpha & Omega Semiconductors – EZBuck™ 3A Synchronous Buck Regulator

AOZ1021
EZBuck™ 3A Synchronous Buck Regulator
General Description
The AOZ1021 is a synchronous high efficiency, simple
to use, 3A buck regulator. The AOZ1021 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 AOZ1021 comes in an SO-8 packages and is rated
over a -40°C to +85°C ambient temperature range.
Features
● 4.5V to 16V operating input voltage range
● Synchronous rectification: 100mΩ internal high-side
switch and 20mΩ Internal low-side switch
● High efficiency: up to 95%
● Internal soft start
● 1.5% initial output accuracy
● Output voltage adjustable to 0.8V
● 3A continuous output current
● Fixed 500kHz PWM operation
● Cycle-by-cycle current limit
● Pre-bias start-up
● Short-circuit 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
R_C
C_C
VIN
EN
AOZ1021 ^LX
COMP
FB
AGND
PGND
L1 4.7µH
R1
R2
VOUT
C2, C3
22µF Ceramic
Rev. 1.1 November 2007
Figure 1. 3.3V/3A Buck Regulator
www.aosmd.com
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