AOZ1039DI Datasheet, PDF (1/13 Pages) Alpha & Omega Semiconductors – EZBuck™ 8 A Synchronous Buck Regulator

AOZ1039DI
EZBuck™ 8 A Synchronous Buck Regulator
General Description
The AOZ1039DI is a high efficiency, easy to use, 8 A
synchronous buck regulator. The AOZ1039DI provides
up to 8 A of continuous output current with an output
voltage adjustable from 1.2 V to 0.8 V when the input
power rail is 12 V. For higher output voltage and/or lower
input voltage, the output current should be derated
according to thermal performance.
The AOZ1039DI comes in a DFN5x6 is rated over a
-40 °C to +85 °C operating ambient temperature range.
Features
z 4.5 V to 18 V operating input voltage range
z Synchronous Buck: 70 mΩ internal high-side switch
and 11 mΩ internal low-side switch (at 12 V)
z Up to 95% efficiency
z Internal soft start
z Output voltage adjustable to 0.8 V
z 8 A continuous output current
z Cycle-by-cycle current limit
z Pre-bias start-up
z Short-circuit protection
z Thermal shutdown
Applications
z Point of load DC/DC converters
z LCD TV
z Set top boxes
z DVD and Blu-ray players/recorders
z Cable modems
Typical Application
VIN = 12V
C1
22µF
VIN
L1
1µH
EN _{AOZ1039 LX}
COMP
R_C
FB
C_C
AGND
PGND
VOUT
R1
C2, C3, C4
22µF
R2
Figure 1. 1.05 V 8 A Synchronous Buck Regulator, Fs = 450 kHz
Rev. 1.2 September 2011
www.aosmd.com
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