AOZ1281DI Datasheet, PDF (1/12 Pages) Alpha & Omega Semiconductors – EZBuck™ 1.8 A Simple Buck Regulator

AOZ1281
EZBuck™ 1.8 A Simple Buck Regulator
General Description
The AOZ1281 is a high efficiency, simple to use, 1.8 A
buck regulator flexible enough to be optimized for a
variety of applications. The AOZ1281 works from a 3 V to
26 V input voltage range, and provides up to 1.8 A of
continuous output current. The output voltage is
adjustable down to 0.8 V. The fixed switching frequency
of 1.5 MHz PWM operation reduces inductor size.
Features
z 3 V to 26 V operating input voltage range
z 240 mΩ internal NMOS
z High efficiency: up to 95 %
z Internal compensation
z 1.8 A continuous output current
z Fixed 1.5 MHz PWM operation
z Internal soft start
z Output voltage adjustable down to 0.8 V
z Cycle-by-cycle current limit
z Short-circuit protection
z Thermal shutdown
z Small size: DFN 2x2, 8L
Applications
z Point of load DC/DC conversion
z Set top boxes
z DVD drives and HDD
z LCD Monitors & TVs
z Cable modems
z Telecom/Networking/Datacom equipment
Typical Application
VIN
C1
4.7µF
C3
BST
EN
LX
AOZ1281
FB
GND
L1 2.2µH
VOUT
R1
C2
10µF
R2
Rev. 1.0 June 2011
Figure 1. 1.8 A Buck Regulator
www.aosmd.com
Page 1 of 12