AOZ3017 Datasheet, PDF (1/14 Pages) Alpha & Omega Semiconductors – EZBuck™ 4 A Synchronous Buck Regulator

AOZ3017
EZBuck™ 4 A Synchronous Buck Regulator
General Description
The AOZ3017 is a high efficiency, simple to use, 4 A
synchronous buck regulator. The AOZ3017 operates
from a 4.5 V to 18 V input voltage range, and provides up
to 4 A of continuous output current with an output voltage
adjustable down to 0.8 V.
The AOZ3017 comes in an exposed pad SO-8 package
and is rated over a -40 °C to +85 °C operating ambient
temperature range.
Features
 4.5 V to 18 V operating input voltage range
 55 mΩ internal high-side switch and 20 mΩ internal
low-side switch (at 12 V)
 Up to 95 % efficiency
 External soft start
 Output voltage adjustable to 0.8 V
 4 A continuous output current
 500 kHz PWM operation
 Cycle-by-cycle current limit
 Pre-bias start-up
 Short-circuit protection
 Thermal shutdown
 Exposed pad SO-8 package
Applications
 Point of load DC/DC converters
 LCD TV
 Set top boxes
 DVD and Blu-ray players/recorders
 Cable modems
Typical Application
VIN
C1
10µF
R_C
C_C
C_SS
VIN
SS
EN
AOZ3017 ^LX
COMP
FB
AGND
PGND
L1 4.7µH
R1
R2
VOUT
C2, C3
22µF
Rev. 0.4 August 2012
Figure 1. 3.3 V, 4 A Synchronous Buck Regulator, Fs = 500 kHz
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