AOZ1019-EVA
EZBuck™ 2A Simple Buck Regulator
Evaluation Board Note
General Description
The AOZ1019 evaluation board is a fully assembled and
tested circuit board built with the AOZ1019 buck regulator
IC. It outputs a preset or adjustable voltage and up to 2A
of continuous current. The evaluation board requires an
input voltage from 4.5V to 16V. The output voltage is
preset and can be adjusted from 0.8V to V
IN
–0.4V
The AOZ1019-EVA circuit features include; current limit,
short circuit protection, input under voltage lock out,
internal soft start and thermal shut down. It operates at a
fixed 500kHz switching frequency. The current mode
control and integrated internal MOSFET minimize
component count, board area and total cost.
The AOZ1019 comes in an SO-8 package and is rated
over a -40°C to +85°C ambient temperature range.
Features
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4.5V to 16V operating input voltage range
Output voltage was preset to 3.3V, adjustable down to
0.8V
2A continuous output current
Fixed 500kHz PWM operation
Internal soft start
Cycle-by-cycle current limit
Short-circuit protection
Thermal shutdown
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Applications
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Point of load DC/DC conversion
PCIe graphics cards
Set top boxes
DVD drives and HDD
LCD panels
Cable modems
Telecom/networking/datacom equipment
Evaluation Board Schematic
VIN
C1
22µF
Ceramic
C6
1µF
VIN
From µPC
C5
L1 4.7µH
EN
COMP
AOZ1019
LX
C4
R1
VOUT
+3.3V Output
@2A
C2, C3
22µF
Ceramic
R
C
C
C
FB
AGND
PGND
D1
R2
Figure 1.
Rev. 1.0 October 2007
www.aosmd.com
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