AOZ1110 Datasheet, PDF (1/16 Pages) Alpha & Omega Semiconductors – 4A Synchronous EZBuck Regulator

AOZ1110
4A Synchronous EZBuck Regulator
General Description
The AOZ1110QI is a high efficiency, easy to use, 4A
synchronous buck regulator optimized for portable
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
temperature range.
Features
z 2.7V to 5.5V input voltage range
z 30mΩ high-side and 20mΩ low-side MOSFET
z Efficiency up to 95%
z Adjustable soft start
z Output voltage adjustable down to 0.8V
z 4A continuous output current
z Selectable 500kHz & 1MHz PWM operation
z Cycle-by-cycle current limit
z Over-voltage protection
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
Typical Application
VIN
C1
22µF
Ceramic
R_C
C_C
Rev. 1.0 October 2010
5V
R3
MCU
VDD VIN PGOOD
EN
FSEL
AOZ1110QI ^LX
COMP
SS
FB
AGND PGND
Css = NC
L1 1.0uH
R1
R2
Figure 1. Typical Application
www.aosmd.com
VOUT
C2, C3
22µF
Ceramic
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