AOZ1057AI Datasheet, PDF (1/15 Pages) Alpha & Omega Semiconductors – EZBuck™ 3A Simple Buck Regulator

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
VIN
C1
22µF Ceramic
Css
82nF
SS
VIN
EN
U1
AOZ1057 ^LX
COMP
R_C
C5
FB
L1
6.8µH
VOUT
3.3V
R1
C2, C3
22µF Ceramic
C_C
D1
AGND
PGND
R2
Rev. 1.3 November 2009
Figure 1. 3.3V/3A Buck Regulator
www.aosmd.com
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