AOZ1110QI Datasheet, PDF (1/16 Pages) Alpha & Omega Semiconductors – Efficiency up to 95%

AOZ1110
4A Synchronous EZBuck Regulator
Not Recommended For New Designs
General Description
Features
The AOZ1110QI is a high efficiency, easy to use, 4A
z 2.7V to 5.5V input voltage range
synchronous buck regulator optimized for portable
z 30mΩ high-side and 20mΩ low-side MOSFET
electronic devices. The AOZ1110QI works from a 2.7V to
5.5V input voltage range, and provides up to 4A of
continuous output current with an output voltage
adjustable down to 0.8V. With a 1% output accuracy
rating, the AOZ1110 is designed for low tolerance
applications, such as DSPs and FPGAs.
The AOZ1110QI is available in a 24-pin 4X4 QFN
package and is rated over a -40°C to +85°C ambient
z Efficiency up to 95%
s ^{z Adjustable soft start}
n z Output voltage adjustable down to 0.8V
ig ^{z 4A continuous output current}
s ^{z Selectable 500kHz & 1MHz PWM operation}
e ^{z Cycle-by-cycle current limit}
D ^{z Over-voltage protection}
temperature range.
mended ^{For New Typical Application}
m _VIN
co _C1
e 22µF
Not ^{R Ceramic}
z Short-circuit protection
z Thermal shutdown
z Power good indicator
z Small size 4x4 QFN-24 package
Applications
z Point of load DC/DC conversion for DSPs, FPGAs,
ASICs and microprocessors
z DVD and HDD
z Notebook PCs
z Telecom/Networking/Datacom equipment
5V
R3
MCU
VDD VIN PGOOD
EN
FSEL
L1 1.0uH
VOUT
AOZ1110QI ^LX
COMP
R1
R_C
C_C
SS
FB
AGND PGND
Css = NC
C2, C3
22µF
Ceramic
R2
Rev. 1.0 October 2010
Figure 1. Typical Application
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