AOZ1020-EVA Datasheet, PDF (1/4 Pages) Alpha & Omega Semiconductors – EZBuck™ 2A Simple Buck Regulator Evaluation Board Note

AOZ1020-EVA
EZBuck™ 2A Simple Buck Regulator
Evaluation Board Note
General Description
The AOZ1020 evaluation board is a fully assembled and
tested circuit board built with the AOZ1020 buck regulator
IC. It outputs a preset or adjustable voltage at 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 AOZ1020-EVA circuit has features like 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 AOZ1020 comes in 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
● Output voltage is preset to 3.3V and 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
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
Evaluation Board Schematic
VIN
C5
R_C
C_C
C1
22µF Ceramic
VIN
PG
EN
C6
AOZ1020
COMP
LX
AGND
PGND ^FB
5V
R3
L1
4.7µH
VOUT
C4 R1
C2, C3
22µF Ceramic
R2
10kΩ
Figure 1.
Rev. 1.0 December 2007
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