AOZ1015-EVA Datasheet, PDF (1/4 Pages) Alpha & Omega Semiconductors – EZBuck™ 1.5A Simple Buck Regulator Evaluation Board Note

AOZ1015-EVA
EZBuck™ 1.5A Simple Buck Regulator
Evaluation Board Note
General Description
The AOZ1015 evaluation board is a fully assembled and
tested circuit board built with the AOZ1015 buck regulator
IC. It outputs a preset or adjustable voltage at 3.3V and
up to 1.5A 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 AOZ1015-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 integrated
internal MOSFET minimize component count, board area
and total cost.
The AOZ1015-EVA demonstrates the simple buck con-
verter design. Only one resistor value change is required
for different output voltages while inductor, capacitor and
compensation resistor values are unchanged. The
AOZ1015-EVA also supports the simple-layer board
design with all ceramics output capacitor.
Features
● 4.5V to 16V operating input voltage range
● Output voltage is preset to 3.3V and adjustable down
to 0.8V
● 1.5A continuous output current
● Fixed 500kHz PWM operation
● Internal soft start
● Cycle-by-cycle current limit
● Short-circuit protection
● Thermal shutdown
● Enables single layer board with all ceramic output
capacitors design
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
C1
22µF Ceramic
C6
R_C
VIN
L1
4.7µH
EN
AOZ1015 ^LX
COMP
FB
C_C
AGND PGND
VOUT
C4 R1
C2, C3
22µF Ceramic
R2
10kΩ
Rev. 1.0 October 2007
Figure 1.
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