Rev. 1.0 June 2011 www.aosmd.com Page 1 of 14
AOZ1051PI
EZBuck™ 3 A Synchronous Buck Regulator
General Description
The AOZ1051PI is a high efficiency, easy to use, 3 A
synchronous buck regulator. The AOZ1051PI works from
4.5 V to 18 V input voltage range, and provides up to 3 A
of continuous output current with an output voltage
adjustable down to 0.8 V.
The AOZ1051PI comes in an exposed pad SO-8
package and 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 m internal high-side switch
and 40 m internal low-side switch (at 12 V)
z Up to 95 % efficiency
z External soft start
z Output voltage adjustable to 0.8 V
z 3 A continuous output current
z 500 kHz PWM operation
z Cycle-by-cycle current limit
z Pre-bias start-up
z Short-circuit protection
z Thermal shutdown
z Exposed pad SO-8 package
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
Figure 1. 3.3 V 3 A Synchronous Buck Regulator, Fs = 500 kHz
LX
VIN
VIN
VOUT
FB
PGND
EN
COMP
AGND
C2, C3
22μF
R1
R2
C
C
C
SS
R
C
C1
10μF
L1 4.7μH
AOZ1051PI
SS
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